Snapper 210 User's Manual
Contents
1. Scavenging port Intake port Pulse hole TH0 930 Ju T140 932 Ate T180 936 5 Fig 10 4 Cylinder bore mm T110P T140P Standard dimension 030 0 07 032 0 02 Allowable limit Until plating E exfoliates 4 4 Piston and piston rings The special light alminium alloy piston which reduces its weight and mass of reciprocating motion can lessen the bearing loads during the operation of the engine In a two cycle engine the piston with its original function also plays an important role in the function of valves actuating at the suction scavenging and exhaust strokes of the engine Therefore a hemispherical shape is adopted for the piston crown to facilitate the flow of the exhaust gas and scavenging air The piston rings are positioned with knock pins so that their open ends will not be caught by the ports in cylinder The slip out of the pin from the piston is protected by the stop rings or snap rings which installled both sides of the piston pin hole The piston rings are made of special cast iron and their surface are treated with parkerizing for improving wear resistance The O mark or t mark is stamped on the top of the piston These marks indicate the di rection of the piston insertion into the cylinder Insert the piston into the cylinder aligning the convex portion of the piston with intake port side without fail If the piston is reversely inserted by mistake2. TC 12 22 7 pa Clutch case bearing 6201Z Note 1 The sealing type of bearing is indicated by Z Tapped hole 4 2 Case tightening torque 0 4 0 5 kg m in both single and both sided seal 2 One piece type clutch case is prepared for both T1 10PD and T140PD engines spare parts Involute spline de 80 5 E Zen re Involute spline 7 8X 10X08 al a i z d 3 a Gi pe D D 3 i gt gt 8 Y Al E Mexa Tapped Section A A Crankshaft and connecting rod The crankshaft is a precision forging made of carburizing steel and is quenched and tempered normally The crankpin and journal are case hardened and finished by grinding for wear resistance The connecting rod and the crankshaft are assembled in pairs and the needle bearings are fitted in the big and small end of the rod Therefore if either the crankshaft or the connecting rod requires replacement due to abnormality the whole crankshaft assembly including connecting rod should be replaced However as for the needle bearing at the small end replacement of the needle bearing only is possible Since high precision of each part is required to assemble the crankshaft and connecting rod these parts are not replaceable separately 1 Runout of crankshaft end Fig 3 Fig 4 The runout of the crankshaft end b b should be within the values shown in the table The value is measured by a dial gauge by rotating the cranksh
3. 10 socket Ratchet screwdriver Puller Muffler 1 Dismount muffler cover then plate muffer 2 Dismount muffler body gaskets are come off at the same time One is heat insulator 3 Dismount muffler bracket 8 spanner 10 socket Ratchet Cylinder Dismount cylinder T110 T140 M6 T180 M5 Case 1 Disassembly cases 2 Dismount crankshaft Piston 1 Remove piston pin crip 2 Dismount piston pin 3 Remove piston rings from piston 4 T allen wrench 4 screwdriver Long nose plier Pin bar 8 2 2 Disassembly and reassembly procedures for recoil starter Step for disassembly Illustration Pull out starter rope 1 about 40 cm and grasp reel with hand so as not to return former position See Fig 62 Pull out starter rope fully to the inside of the recoil starter with a screwdriver See Fig 63 Rewind starter rope slowly until rotation stops applying the brake on reel by hand 4 Remove binding screw and gently take out reel Remove reel Note 1 Take care not to remove reel quickly Otherwise spiral spring may jump out from starter case However in case of replacing the spriral spring above disasembly procedures are need not to be followed in that order 2 Reassembling procedure Step for Reassembling Hook the spiral spring end to the h
4. PS rpm 0 85 7000 1 0 6100 1 3 6000 Max output PS 1 1 8000 1 4 8000 1 8 7000 Max torque kg m rpm 0 108 6500 0 15 6000 0 20 5500 Mixture of gasoline and lubricating oi Mixture ratio 20 25 1 Lubricating oil 2 cycle motor oil Carburetor Diaphragm type si Breakerless ignition type Ignition system flywheel magneto MTI S S lt Starting system Recoil starter Mixture oil with fuel petroil lubrication Lubrication Dry weight kg 152 X 202 X 238 152 X 209 x 242 159 x 224 x 264 Q11 x 202 x 238 211 X 209 x 242 Note 1 The above specifications are subject to change without prior notice by the manufacturer for the purpose of improvements 2 The speed rpm indicates a mesured value at each output shaft 3 The figures in the parenthesis indicate the values of the clutchcase one piece type engine respectively Explanation of indication T 140 P F D O0l Dimensions Length X With X Height mm Rotating direction P Counter clockwise direct connection M Clockwise direct connection LL special specifications Customer code No 001 999 Specification Fuel system D Diaphragm type carburetor F Float type carburetor O Type F Flange type D with clutch drum S Shoulder type trimmer Output Maximum output multiplied by a hundred Major classification 2 cycle engines initials TWO cycle engine Shaft output PS Sha
5. dimension Allowable limit 4 Clearance between piston ring and ring groove Piston ring side clearance Fig 17 Measure the clearances between piston tings and ring grooves with a feeler gauge Replace the piston and piston rings if clearance exceeds the allowable limit mm Model TLLOP Standard dimension Allowable limit 0 02 0 06 0 15 Fig 17 4 5 Centrifugal clutch Fig 18 19 The centrifugal clutch is equipped with two weights shoes and one spring When the engine revolution reaches the specified level it causes the weights to fly outward by centrifugal force make the shoes come closely into contact with the drum on the clutch case and thus transmits the power to the working machine powered equipment The centrifugal clutch is directly mounted on the boss of the flywheel 1 Clutch drum diameter clutch IN and clutch OFF revolution Clutch IN revolution means the engine speed at which the clutch begins to transmit the rotation to the driven side in the state where a load of 0 01 kg m is applied The clutch OFF revolution means the engine speed at which the driven shaft is stopped on the same condi tions T110P T140P T180P Clutch drum inside diameter mm 54 or 656 76 or 78 Clutch IN standard revolution rpm 3600 4200 3200 3800 0 3 Drum size FR64231 656 0 FR64231A 54 93 Clutch shoe When assembied at shop FR64231 54 and less
6. FR64231A 52 and less Washer Weight FR66871 76 Boss Application of adhesive which prevents a screw from loosing is required Bolt TLLOP T140p 1M6 When assembied at shop FR66843 76 5 and less FR66871 74 5 and less T180P M8 Detailed mounting portion of clutch weight Fig 19 Fig 20 Note Be careful not to apply adhesive on the sliding parts of clutch weight mounting bolts and washers 2 The P and M marks which indicate the direction of rotation and installation are shown on the clutch Be careful of these marks when installing the clutch 3 Do not operate the clutch under an overload for a long time otherwise the clutch will slip and peeling of shoes will occur due to the heat generated by friction Weight tightening torque 0 6 to 0 8 kg m 4 6 a 2 4 7 4 8 Recoil starter The recoil starter is mounted as a standard on the engine for increasing efficiency and safety of the operation When the starter rope which is wound on the reel by the spring tension is pulled by hand the fly wheel will rotate to start the engine result ing from meshing of the ratchet gear linked to the flywheel with the reel s rack After starting the engine the ratchet opens freely by centrifugal force When the binding screw tightened apply the adhesive on it which prevents it from loosing Thightening torque 35 kg cm Apply high quality grease a
7. the spark plug respectively Stop switch Unit Ground wire Iron core Primary wire Fig 52 2 To check the ignition coil Check the contact condition between MTI unit mounted on iron 6 3 core of the coil and terminal points of the primary wire and also of the stop switch For the interior inspection check to see if the sparking performance satisfies the standards with a coil tester and replace it if the performance is not exceeds the standard Take care that even when the tester indicates normality of the ignition coils if the phenol resin case had been cracked the current might cause a leak through the crank case Three needle sparking performance at normal temperature 1361 Adjustment of ignition coil air gap The clearance air gap between the ignition coil and the circumference of the flywheel affects the starting per formance greatly Therefore adjust the air gap carefully Adjusting procedure Sue 637 w Air gap 0 3 mm to 0 4 mm Insert 0 3 mm thick paper between the flywheel and the iron core of the ignition coil and depress the ignition coil onto the flywheel and then tighten the mounting screw for the igntion coil firmly Mounting slot Becareful of the gap if it is less than 0 3 mm there is a danger of interference between the iron core and the flywheel 6 4 63 1 a OI MTI unit MTI Mitsubishi Transistor Ignitor is a contactless or breakerless ignition unit it
8. 10 Gland part part airtightness Fig 57 Powder sealing will not cause leakage under high pressure and its mechanical strngth is high il Filler powder A TII0P Ti40P M6 T180P M8 A copper core is inserted in the center electrode to d 12 Copper core Ka e A improve thermal conductivity of the ignition portion B TIIOP TI40P 33 mm d 13 Gas circulation space Gas which circulates in this space has major influence on T180P Smm temperature of spark plug Insulator leg High alumina insulator same as 9 14 8 Overhaul 8 1 Tools Dial gauge Micrometer Cylinder gauge Feeler gauge Torque wrench Coil tester Phong nse pier Ratchet wrench 8 10 13 17 Socket Spanner Spark plug wrench Extension Bar Screwdriver Small THREE BOND Hammer L type allen wrench General Tools Order A Thee ist Usdwe hows lt Af e Prosper ivin Wellman 3121 R279 7273 15 8 2 OVERHAUL 8 2 1 Disassembly procedure Carburetor 3 Fan case 4 Process Top cover 1 Dismount spark plug cover and spark plug 2 Dismount top cover Phillips type screwdriver hereafter called screwdriver 19 socket wrench CH screwdriver CH screwdriver 3 Dismount spark plug Dismount air cleaner Disconnect fuel
9. 5 Reassembling procedure Step f ep Se Reassembly procedure receasembling 1 Piston 1 Install piston ring in ring grooves Be careful of Long nose direction of knock pin pliers 2 Install piston to connecting rod Pin inserting bar O Replace snap rings if deformed O Apply oil on the needle bearing Insert snap ring while it is turned with a long nose pliers Long nose plier Fig 73 2 Crankcase 1 Insert crankshaft into fan side case screwdriver Position piston s convex portion so as to oil locate at intake side Mark b cerb side Fluid seal O Apply a small amount of oil on oil seal lip O Apply Three Bond No 1215 fluid seal on surfaces of case uniformly with fingers o Don t apply fluid seal or sealant excessively or trouble may occur since the excess of it will be extruded to the inside of cases and be skewed into moving parts O 2 Assemble starter case O Screw MS x 25 3 pieces 23 Step for receasembling Reassembly procedure Tools 3 Cylinder 1 Mount cylinder gasket Hex wrench O Place gasket on case correctly 2 Install cylinder on cases O Apply a small amount of oil to piston rings O Place piston ring ends at knock pin position Install cylinder fange surface of both ports paralleing with crankshaft O Check to see if crankshaft rotate smoothly by hand after tightening Crankshaft O oe Re Fig 74 O Screw T110 T140 M6 he
10. cap s curely by the follow ing procedures The above mentioned expertise is summarized as follows MTI unit functions in the same way as the conventional contact points by means of combining various characteris Tetminal tics of the semiconductors Therefore when a signal enteres into the thyrister SCR the primary circuit is shut off In point ignition system at this moment the point is opened then high voltage is generated in the secondary coil resulting occurance of spark at the spark plug Cap ads d 6 5 Spark plug Condition only pressed by han The spark plug is used for igniting the airfuel mixture sucked into the cylin der with a spark generated between its center electrode and ground electrode If electrodes are burnt or carbon of excessive amount is deposited on the electrodes surfaces starting failure and reduced output will result Therefore the spark gap should be adjusted to the suitable value Correct Incorrect E Fig 56 1 Spark gap 078 mm allowable limit 0 8 mm 2 Tightening torque 1 2 kg m Intervals of spark gap check every 50 hours of operation 3 Spark plug to be used NGK BM 6A 4 Names of each position 7 Fan The cooling fan has 16 blades and its total weight is designed to keep the center of gravity of the engine at a optimal position for reducing vibration when the engine is coupled with powered equipment Therefore if cooling fan is damaged by
11. capacitor C is reversely charged thus the potential at point a becomes possitive As the flywheel continues to rotate no capacitor discharge occurs even at the peak point of the wave form B causing high positive potential at point a and therefore the voltage across Tr2 base is lowered resulting in switch Off of Tr2 1 3 4 Thus current I1 ceases flowing then potential at point b becomes high thereby the SCR conducts current turns on by entering the gate of a signal current from point d 5 The potential at point C is lowered by this turning on of SCR and consequently current IB which has been flowing into Trl changes its path and flows to the SCR because its resistance in this state is less than that of Tri Accordingly Trl is turned off and current IC is interrupted rapidly when the point is opened thus high voltage is generated in the secondary coil of the ignition coil due to mutual indiction and spark occurs at the spark plug When inserting the cap it should not only be pressed but be inserted with screwing it clockwise And screwing it unticlockwise when dismounting 5 Mounting and dismounting spark plug The plug is connected to the secondary winding of the ignition coil If the spring is inserted incompletely into the plug terminal heat is generated at the contact points between them and this will cause pin holes on the rubber surface and they might induce the accident of electrical shock Therefore install the plug
12. carburetor with gasoline overhaul and check the abnormalities of each part At assembling rinse inner parts with clean gasoline and blow with compressed air Do not use waste cloth See Adjusting procedure 3 Do not rinse the electric parts Just wipe the dirt out with dry cloth and dry them See Adjusting procedure f 4 As for other parts clean sufficiently with cleaning oil d 5 Decarbonising inspection and main tenance 1 Cylinder Fig 68 Remove carbon deposited in the combustion chamber and exhaust port using a screwdriver with care not to damage the surface of aluminium or chrome plated por tion until all the aluminium sur face will appear 2 Piston j Pigs Repair the damage such as seizure or scratch with fine sandpaper 400 In case the seizure or scratch is extraordinary replace the piston with a new one Remove carbon deposited on the head and ring grooves with a screw driver 20 Fig 69 3 Muffler Fig 70 Dismount muffler lid and remove carbon which is pilling at exhaust passage or inner part of the cylin der Do not disassemble the muffler body except for replacement of it 6 Spark plug 7 8 Remove carbon pilling on the elec trode and insulator with a fine driver Especially clean the insulator until the plate surface is revealed and adjust the clearance between the electrodes after cleaning 1 Standard clearance 0 6 to 0 7 mm
13. center groove Readjustment is not usually required because matching is made with the engine so that the optimum air fuel mixture is obtained at this position When the clip is set in an upper groove The clearance between the jet needle and needle jet becomes small and the air fuel mixture becomes lean When the clip is set in a lower groove The clearance between jet needle and needle jet becomes large and the air fuel mixture becomes rich Throttle valve Three grooves C Diameter of straight portion A Straight portion functions at show speed B Tapered portion functions at mediam speed Bar clip Clearance Jet needle JN pa jet Fig 39 mm Model T180P 2 010 TILOP 92 020 Straight 5 3 2 Main adjusting screw 1 Characteristics The main adjusting screw is used for controlling the fuel flow rate to meet the optimum quantity required for the engine 2 Adjustment Adjust the engine with the main ad justing screw so that the highest out put is developed when a large load is applied at a high speed Standard back off turns 2 1 2 1 2 turns Throttle adjusting screw low revolution adjusting screw Main adjusting screw high speed fuel control screw Identification T110 171 symbol T140 161 Fig 41 1 Move the throttle lever to the full open position 2 Set the main adjusting screw in the position wh
14. equipment during operation park plug Spark occurs at spark plug Check fuel filter for clogging Check and clean Abnormal noise is produced in the interior Failure of internal parts of engine Disassemble engine and check each portion a SNAPPER POWER EQUIPMENT McDonough Georgia 30253 ADivision of Fuqua Industries MANUAL 07315 9 86 Printed in U S A 28
15. flow rate becomes excessive when the float lever height is too high Fuel flow rate becomes insufficient when the float lever height is too low Shortage of output power and faulty acceleration will result 5 3 5 Diaphragm pump 1 Characteristics The diaphragm pump is used for feed ing the fuel under pressure to the float valve If the function of this part drops troubles such as failure in starting faulty acceleration and engine stall will occur What perform the pumping action by variation of pressure in the crankcase are check valves 2 Adjustment servicing procedure Es Check valve Fig 50 The portion of check valves of the pump diaphragm should be flat without damage and deformation Therefore mounting should be correctly made at assembly with the correct direction of the diaphragm and correct assembly order of the gaskets UU 5 3 6 Carburetor troubleshooting Trouble phenomenon Probable cause Remedy Fuel is not sucked into the cylinder Fully close choke valve Faulty operation of float valve Disassemble and clean Pesto closing of choke valve Clogged fuel passage with dust or gummy matter Produced by deterioration of gasoline Disassemble and clean Excessively tightened main adjust screw Adjust Low float arm height Adjust Faulty assembly of inlet valve spring Carry out assembly once again Faulty assembly of float arm pi
16. it will cause the rings to stick Piston pin SS C gt Mounting direction ess 0 or t mark carburetor side Fig 12 1 Clearance between piston and cylinder Piston clearance Fig 13 hi D 2 4o mm T110P Tam T180P Piston outside 0 025 432 0 025 936 70 025 diameter 030 0 040 0 040 0 040 Standard dimension 0 025 0 06 0 035 0 07 Allowable limit 0 10 lt Measure the maximum diameter of the piston with a micrometer and calculate the difference called piston clearance between it and the maximum cylinder bore Replace the piston assembly if this clearance exceeds the allowable limit 2 Clearance between piston pin hole and piston pin Fig 14 Fig 15 Measure the piston pin hole inside diameter with a cylinder gauge and measure the piston pin outside diameter with a micro meter Replace the piston and piston pin in a set if the fitting clearance exceeds the allowable limit mm Model T110P Standard 0 006T dimension 0 010L Altowable limit 0 06 3 Clearance of open ends of piston ring Ring gap Fig 16 Insert the piston ring into the cylinder skirt horizontally so that the ring will be square with cylinder wall by using the piston See Fig 16 and measure the gap dimension A as shown in Fig 16 with a feeler gauge Replace piston rings if this gap exceeds the allowable limit Measuring apparatus Feeler gauge mm Model Standard
17. smali the atomization of fuel is made satisfactorily Throttle valve and jet needle Throttle valve _ Air inflow side Air outflow side Various cut aways CA and recesses R of the throttle valves have been adopted to meet each model for stabilizing the fuel flow rate during idling revolution mm The air fuel mixture supply rate to the combustion chamber is controlled by changing the open _ing of the throttle valve That is suction airflow is controlled by it and at the same time the fuel flow rate injected out of the needle jet is metered by the jet needle which moves in the needle Air jet in accord with the opening of the throttle valve Fig 37 indicates the states of needle jet throttle valve and air fuel mixture Throttle valve Air fuel mixture Jet needie Needle jet ae z li Fig 37 2 Adjustment 1 Throttle valve and throttle adjusting screw Adjust the throttle valve opening during idling revolution with the throttle adjusting screw stop screw Engine revolution increases when the screw turned clockwise Engine revolution decreases when the screw turned counterclockwise Note The engine may stall if the revolution is excessively decreased Throttle vaive Throttle adjusting screw Main adjusting screw 2 Jet needle The head of the jet needle is provided with three grooves and the setting is made usually at the
18. 2 When replacing the ignition plug use NGK BM 6A Cleaning of air cleaner Muffler body Fig 70 Plug gap lt E ar 01 Fig 71 After washing the element with gasoline squeeze it tightly by hand and immerse it in engine oil and squeeze again tightly after that install it in the cleaner case Cleaning of fuel filter Take out the suction hose in the fuel tank clean the filter which is attached on the weight of the hose and the sponge installed the inside of the filter respectively Section AA Fig 72 21 8 2 4 List of tightening torques Item Crankcase Kinds of screws MS pan head screw Cylinder M6 hex Socket head washer faced screw MS hex socket head bolt Fan case MS pan head screw O Flywheel Insulator M6 nut M5 pan head screw Carburetor Y Air cleaner cover M4 pan head screw MS pan head screw Tightening torque kg m Recoil starter Spark plug Ingition coil O Centrifugal clutch MTI unit Muffler cover M5 pan head screw M14 MS hex bolt Special bolt M4 pan head screw MS hex bolt Fan M6 nut Other screw M4 pan head screw MS pan head screw D mark Be careful of tightening torque mark Make sure to use a torque wrench Becareful of nut size 6 for flywheel and fan since it has been adopted smaller sizes COX 22 Al bi 8 2
19. 4 3 Measuring equipment Micrometer main bearing Fig 7 Measure the outside diameter of each crankshaft journal with a micrometer Re place the crankshaft assembly and main ball bearings if the clearance exceeds the allowable limit mm 0 006T 0 017L Cylinder The cylinder and cylinder head are made of aluminium die casting and cast in one piece for increasing the heat conductivity and reducing the engine weight 1 The intake scavenging and exhaust ports are prepared on the cylinder and the inner surface of the cylinder is porous chrome plated channeled type to increase the wear resistance The radiation of heat was improved due to the lengthened cylinder 2 The cylinder head inner surface forms a part of spherical surface and the cooling fins on the outer surface are formed so that air may flow sufficiently between them to provide a large cooling effect And the spark plug is mounted on the right overhead of the cylinder head for the improvement of output The relations among intake exhaust and scavenging are shown in Fig 8 and Fig 9 Flow of scavenging gas Exhaust port Scavenging port Intake port Exhaust port Intake port s Scavenging port Fig 9 3 The carburetor mounting surface on the cylinder is provided with an air hole pulse hole for transmitting the pressure variations in the crankcase to the diaphragm pump in the carburetor through the insulator Cooling fin
20. A Mount two balls Mount valve cushion in valve seat B on the side of two holes Insert valve seat B Tighten the cap by hand securely EE ee Cleaner case Element holder Element Serew Steel net Fig 28 Air cleaner The air cleaner is equipped with polyurethane foam element having high filtering efficiency and the mufler mounted on the cleaner case reduces noise of air inlet The output of the engine drops when the air cleaner element is clogged and the starting performance drops as well Therefore clean it once every 25 hours or less of the operation 7 4 10 List of servicing standards Servicing item Standard dimension T180P Standard Allowable dimension limit Allowable limit Allowable limit Standard dimension Cylinder bore dimension Clearance between piston and cylinder difference between maximum cylinder bore and piston outside diameter Until plating exfoliates peel off Until plating 0 02 exfoliates peel off FER Until plating 036 aon exfoliates peel off 0 035 0 07 Clearance between piston pin hole and piston pin Clearance between open ends of piston rings Ring gap Clearance between piston ring and ring groove Ring side clearance Clearance between rod big end and crankpin Clearance between rod small end and piston pin Axial or end play of crankshaft Clearance between crank shaft and main bearing Clea
21. Service Manual for SNAPPER MODEL 210 amp 240 TRIMMER ENGINES 211cc T110 MODEL 240cc T140 MODEL This manual covers the recommended overhaul and repair procedures for the engine models used on Snapper Model 210 amp 240SS Trimmers The engines are identical in appearance but have internal differences The engine powering the 210SS is a Mitsubishi model T110 while the 240SS engine is a Mitsubishi model T140 This manual has been reproduced in part from the Mitsubishi manual cover ing these two models plus a model T180 which is not at present used on Snapper Trimmers An ex C planation of the Mitsubishi model designation is found on page 1 of the manual SNAPPER POWER EQUIPMENT McDonough GA 30253 FUGUA MANUAL 07315 9 86 Compeny TABLE OF CONTENTS TZ SPEGIRIGATIONS tence tis a ass oS eS a ead ob cat eh Cae N 1 2 PERFORMANCE lt a am Rei ce ees A e fae 2 3 OUTLINE DRAWING OF ENGINES 3 amp 4 4 STRUCTURE FUNCTION AND SERVICING STANDARDS ccceeeeeee 5 4 1 Crankcase and fan case clutch case 0 c cece eee cece enuan 5 4 2 Crankshaft and conneciingrod 0c e cee eeues ENER 5 AS Cylinder sci sere A EE ed eres RA a E eG a ak EEGEN 5 4 4 Piston and piston gings 6 4 5 Centrifugal clutch EEN 6 BG ROCON Startar ee Ee A aye aa a a ea cist eg 7 TARAP ES AAA E EEA TE ae wale be teeta ees 7 AA a Sacro EES 7 BO PAU EE 7 4 10 List of servicing standards 0 ccc ccc cece e
22. aft supported the points a a on the V block The whole crankshaft assembly should be replaced if the allowable limit is exceeded Crankshaft Connecting rod 4 pe 1 Within Dim gy Needle bearing 22 4 bo T180 Fig 3 mm Within 0 05 Standard dimension Within 0 05 0 06 H 0 06 Le Allowable limit 2 Clearance between crankshaft and con 3 Clearance between connecting rod big Measuring equipment or apparatus necting rod big end End play of big end Ee Fig 5 Push the connecting rod in one direction and insert a feeler gauge into the clearance on the opposite side and measure the clearance at four places Replace the whole crankshaft assembly if the clearance exceeds the allowable limit mm 0 16 0 35L Allowable limit 0 55 Standard clearance Fig 5 Measuring equipment Dial gauge or indicator end bearing and crankpin Fig 6 After fixing the crankshaft put a dial gauge on the connecting rod small end and read the gauge value while moving the connecting rod in the longitudinal direction Replace the whole crankshaft assembly if the dial gauge reading exceeds the allow able limit mm T110P T140P Standard clearance Fig 6 0 008 0 030L 0 004 0 026L Allowable limit 4 Clearance between crankshaft journal and Crankshaft journat dimension Standard clearance Allowable limit
23. ark plug Clutch Drum dia 654 Oy D Recoil starter p66H8 9 46 Primer pump 4 M6x 1 0 thru Exhaust pipe Choke lever Fuel tank cap Stop switch Fuel tank OUTLINE DRAWINGS OF T140P FLANGE TYPE Carburetor Air cleaner Spark plug Clutch Drum dia 54 Recoil starter p66H8 9 046 Primer pump 4 M6x 1 0 thru Choke lever Exhaust pipe eS Tickler button Stop switch 4 41 STRUCTURE FUNCTION AND SERVICING STANDARDS Crankcase and fan case clutch case The crankcase is made of aluminium by die casting The compression ratio in the crankcase is 1 3 1 5 in general Complete air tightness or seal should be provided for the crankcase because the air fuel mixture sucked through the intake port must be compressed before it is fed into the combustion chamber On the joint surfaces between the crankcase fancase and clutch case the knock pins are mounted to facilitate its assembly correctly when the engine is overhauled The fancase and clutchcase are off centered to send securely the cooling air to the cooling fins on the cylinder Since the three cases cases and rear case are machined separately the spare parts of the cases can be shipped separately Driving side Starter side case case Driving side Ball bearing Oil seal 6001 Fan case Starter side case
24. eassembly procedure Install certrifugal clutch assembly ee an mark surface facing upward o Be careful to avoid forgetting plain washers Apply adhesive on screw However never apply it on sliding portions such as clutch weight fitting bolt and washer etc Screw two M6 bolts into M6 tapped holes on flywheel and fit a screwdriver between the bolts to prevent flywheel from turning Using bolts FR66747 bolts 2 pieces Tightening torque 0 6 0 8 kg m Tightening torque 0 8 1 0 kg m T180P 7 26 Ignition coil Connect lead wire and stop switch Install stop switch together with bracket onto iron core Mount MTI unit using screw M4 x 6 1 pc 4 Insert 0 3 mm thickness paper between flywheel and iron core coil and press the coil and tighten it with bolts Tools Ratchet 13 socket Screwdriver Torque wrench M6 x 25 bolt THREE BOND 1405D 17 socket T180 screwdriver CH screwdriver 8 socket Ratchet small Step for receasembling Air gap 0 3 0 4 mm Reassembly procedure Air gap 0 3 mm 0 4 mm Don t remove this screw o Using screw M5 x 25 2 pc 5 Insert high voltage wire grommet into case Fan case Clutch case Recoil starter Insert fuel tank into starter side case and install fan case Clutch case o Be carefuel to avoid forgetting pad rubber o Using screw MS x 20 without washer screw 3 pcs Mo
25. ectronic switch Generally the current does not flow d A Anode from A to K because of high resistance OFF ERN O i condition However when the specific gate ES ES i A current flows from G to K the internal ig resistance between A and K becomes lower and the current flows ON condition from Ato K O K Cathode 2 Operational principle MTI U type TCI basic circuit diagram 2 gt Secondary ignition coil Primary coil r Lo D Primary voltage wave form a Fig 54 a 2 3 An AC electromotive force is induced in the primary coil of the ignition coil by the rota tion of the flywheel that is alternating voltage is generated between E and C points This primary voltage Refer to wave form A charges capacitor C and gives nagative electric potential to point a With the rotation of flywheel when the primary voltage is changed into negative wave form B the base current IB of Tr1 transister begins to flow through point C and this causes Trl to be ON resulting in flowing of current IC At this moment the capacitor begins to discharge and this causes the base current IB of Tr2 transistor to flow result ting in switch ON of Tri The switch ON of Tr2 also causes current I1 to flow and con sequently the main current IC and current I are increased together The electric potential at point b is too low to turn on SCR at point d Also at this mo ment
26. ee ee ene eeneunnas 8 5 STRUCTURE OF CARBURETOR INSPECTION AND ADJUSTING PROCEDURES coord da es Dane 9 5 1 Description of components 0 cc cece cece eee cee nananana eenen 9 5 2 Operation of carburetor A ak Cae Sees yea Be 10 5 3 Characteristics of main parts and adjusting procedures 10 12 6 STRUCTURE OF FLYWHEEL MAGNETO INSPECTION AND ADJUSTING PROCEDURES 0 ccceeeeccceeaaues 13 6 1 Flywheels A O 13 6 2 IOMON ON 13 6 3 Adjustment of ignition coil air gap 0 cece cece eee een o 13 6 4 MELO a a o cue od Seale AAA ave Wa E O AE we E E 13 6 5 Spark DIUG incl hoes apis os hie ee a a T a tela 14 TOR e WEE 14 8 OVERHAUL terest eee rail ese oe ena ae oe sb oe ahha ncaa ee ab Ober ek manne 15 8 1 Tools measuring apparatus consumable parts 15 8 2 Disassembly reassembly inspection cleaning 16 8 2 1 Disassembly 0 ccc cece een ene ntaceaveneeveeuuns 168 17 8 2 2 Disassembly and reassembly procedures of recoil starter 188219 8 2 3 Inspection and cleaning after disassembling 20821 8 2 4 List of tightening torques 0 cece cee ee cee cn eeeaeeeaes 22 3 2 0 RGASSEMDIY EE 23 27 9 TROUBLE SHOOTING GUIDE socio ca ERR nes tev eed a 28 O a E o 1 SPECIFICATIONS S No of cylinders 1 32x 30 1 36 X 32 Bore X Stroke mm Displacement cc 2 24 1 32 5 21 O Continuous rated output
27. ere the revolution is most stabilized by 5 3 3 1 2 5 3 4 turning it clockwise and counterclockwise within the range of the standard back off turns 2 1 2 1 2 turns The air fuel mixture becomes lean when the screw is turned clockwise The air fuel mixture becomes rich when the screw is turned counterclockwise 3 Check of rapid acceleration and deceleration Quickly rpove the throttle lever to the open position and close position and check if acceleration and deceleration are made smoothly ve If the engine stalls or acceleration is unsatisfactory it is assumed that the air fuel mixture is too lean Make adjustment once again with the main adjusting screw Main diaphragm Characteristics In the diaphragm the differential pressure between the engine intake pressure and the atmospheric pressure is converted into the force of a vertical motion by the application of this force operation of the float valve is controlled by the float arm and also the fuel flow rate entering the metering is controlled This function is equivalent to that of the float in a float type carburetor and what is equivalent to the oil level in a float type carburetor is the internal pressure of the metering chamber Adjustment servicing procedure The diaphragm should be free from Knock damage and the receive pan should Pin hole be free from deformation And be Thruster careful of the knock pin hole at Rubber A mounting of the carburetor to
28. f float arm Faulty mounting of inlet valve spring diaphragm piston L Replace parts Disassemble and clean Assembly Carry out assembly once again Deteriorated diaphragm Replace parts Excessive play of throttle wire Clogged fuel suction hose or fuel filter Carry out assembly once again Adjust Disassemble and clean or replace Faulty ventilation of fuel tank cap Clean Clogged pulse hole or faulty assembly of packing opposite direction Disassemble and clean Air fuel mixture is too rich at high speed even when main adjust screw is crew in Disorder at high speed Worn main adjust screw Replace parts Faulty acceleration Overtightened main adjusting screw Adjust screw Faulty height of float arm too low Adjust Loose diaphragm cap Retighten Leakage from diaphragm packing Retighten or replace packing Clogged needle jet Clean Low idling revolution Adjust Overflow occurs Faulty assembly of float arm and inlet valve spring Carry out assembly once again Worn float valve Replace parts Faulty operation of float valve Clean Dart in float valve seat Clean Faulty assembly of diaphragm Carry out assembly once again Improper float arm height too high Adjust STRUCTURE OF FLYWHEEL MAGNETO AND INSPECTION AND ADJUST ING PROCEDURES The
29. flywheel magneto is composed of the flywheel and the ignition unit which incorporates the ignition coil MTI Mitsubishi Transister Ignitor unit which breaks the primary current intermittently is used for this engine The inspection and maintenance for each part are as follows 6 1 Flywheel 1 Magnetic steel for generating current is caset on the flywheel And the flywheel has many parts and various functions such as ratchet for recoil starter tapped hole M6 for puller etc extremely care should be exercised not to drop it onto the ground in assembling and reassembling Starter ratchet Puller installing tapped hole for removing flywheel 2 M6 Key Built in Fig 51 2 Notice for servicing flywheel 1 When mounting the flywheel onto the crankshaft clean do not use woolen waste cloth the foreign matters on the taper part and align the buil in key on the flywheel with the key seat on the crankshaft correctly and then install it securely 2 The standard tightening torque for flywheel nut 0 8 to 1 0 kg m Use torque wrench without fail 6 2 Ignition coil 1 The ignition coil is water resistant completely because the coil is impregnated with epoxy resin and outside case in molded of phenol resin The primary winding coil low votage and secondary winding coil high voltage are installed inside of the coil case And the primary coil is connected to the MTI unit and stop switch and the secondary coil to
30. ft output PS PERFORMANCE 6 000 7 000 8 000 9 20 Crankshaft revolution rpm 3 000 4 000 5 000 T180P D Performance curves Max torque Recome 0 9 output range 0 8 0 7 0 6 0 5 3 000 4 000 5 000 6 000 7 000 8 000 9 000 Crankshaft revolution rpm 0 18 These performance curves are based on B8013 in JIS and Shaft output PS T140 Performance curves E Hp Max torque 1 Continuous rated output Sa E 0 9 poto 0 8 Recomended output range i 3 000 4 000 5 000 6000 7 000 Crankshaft revolution rpm 8 000 9 000 indicate the values of the engine equipped with the standard attachments 1 2 3 4 Max output means the output pro duced when the engine is completely run in and the throttle valve of the car buretor is fully opened Continuous rated output means the output level which can be obtained continuously and the manufacturer recommends the level because of the high efficiency and the durability of the engine Max torque means the driving torque produced when the engine is fully run These performance curves are based upon JISB8013 and indicate the mea sured values of the engines equipped with the standard attachments 3 OUTLINE DRAWINGS OF T110P FLANGE TYPE Carburetor Air cleaner Sp
31. little on the hook portion of the reel Throttle wire The throttle wire is the remote controller for controlling the engine revolution Its adjuster is of turnbuckle type to facili tates the adjustment Fig 22 Notes When the play of the throttle wire is too large the throttle valve opening about 40 at the time of starting of the car buretor is changed and it will adversely affect the starting performance Adjust the play within the standard value with adjusting nut Ratchet Starter rope Flywheel Starter case Fig 21 Adjusting nut Lock nut Rubber cap Fig 22 Standard play of the throttle wire 0 5 to 1 0 mm Adjusting procedure Adjust the play of the throttle wire by using the dajusting nut to the value of 0 5 1 0 mm while moving the armored cable and set with the lock nut firmly Fuel system The fuel system is composed of the following parts and all of these parts have been made to satisfy the intended functions Tank cap Priming pump Fig 23 1 Fuel tank Taking into account light weight gasoline resisting and heat resistance the fuel tank is made of the plastic resin Model TILOP Fuel tank T140P Tank capacity 0 52 2 Tank cap The tank cap is made to satisfy such functions that the good ventilation no abnormal increasing of the inner pressure due to the temperature rise and minimal leakage of fuel An umbrella valve is adopted for the
32. mistake at overhavling replace the entire fan assembly with a new one If damaged fan is used it will cause unsteadiness of the rotation and the main bearing might be worn out Part Name Structure Spark plug cap can be inserted in this nut This nut is tightened to male screw securely 1 Terminal nut Courrugation rib Corrugation is employed for preventing flashover Notice there is no interchangeability among the fans of these three models Clamping portion is hexagon head whose dimensions are tal sh S Metal shell specified by JIS Opposit side of BM 6A 19 mm Cooling fan Hole for clutch Gasket is tightened with standard mounting torque and this 4 Gasket e gasket is applied to make seal for combustion gas leakage This screw is used for cylinder head and its dimension is 5 Mounting screw M14 mm 6 Center electrode Thses electrodes in special alloy are applied to resist 7 Ground electrode against chemical corrosion and spark consumption This screw is built into insulator and is a fixing screw for 8 Male screw 3 terminal nut ae This is an insulator made of fine quality alumina and has uperior properties such as voltage resistance corrosion 9 Insulator head gt P Passa E E SE resistance mechanical strength thermal conductivity and thermal shock resistance This gland is used for tightening metal shell to maintain
33. n Carry out assembly once again Staring failure Fuel is sucked excessively Dust or dart in float valve seat Disassemble and clean Clogged air cleaner Disassemble and clean Faulty adjustment of main adjusting screw Adjust Excessive float arm height Adjust Faulty setting of jet needle groove Carry out assembly once again Faulty assembly of inlet valve spring Carry out assembly once again Idling is unstable o Revolution cannot be increased engine stalls o Revolution is unstable even when it can be increased s Ei a 2 A Engine stall or disorder in revolu tion occurs during the work but order is good only for a short period of time when the engine is restarted Come off of rubber cap Fix securely Dirty float valve Diassemble and clean Faulty adjustment of adjusting screw idle speed too low Adjust Faulty adjustment of float arm Carryout assembly once again Faulty positioning of jet needle Carry out assembly once again Faulty assembly of flat arm pin Faulty assembly of inlet valve spring Insufficient of opening of choke valve Worn float valve Carry out assembly once again Carry out assembly once again Open choke valve fully Clogged main adjusting screw system Faulty assembly of main adjusting screw Faulty assembly of float arm pin Faulty height o
34. ng is important Therefore the free length should not be changed by extending the spring Also be careful of the in clination of the spring at the time of mounting Check if the spring is securely seated on the guide protruded part of the float arm 2 Check if the hook at the end of the float arm is correctly fitted on the float valve 3 Fully bring the float pin to the float pin set screw side at the time of tightening of the float pin If the float pin is tightened in the state where it is located on the side of the mark in the right figure the pin will be lifted up the specified float lever height will not be obtained and the vlave opening pressure 0 9 0 2 kg cm will also be disordered Therefore parti cular care should be exercised in the setting of the float pin 4 The float arm height is a very important factor for the engine performance Correctly adjust its height using a height gauge Adjust it within 1 4 to 1 6 mm from the carburetor body surface as shown in the figures 1 4 1 6 mm from body surface Float arm Inlet valve spring Float arm height gauge FR15330 Material SK5 Thickness 2mm Float arm Guide protruded Inlet valve spring Float arm hook Float valve Fig 45 Overflow valve seat Float arm Inlet valve spring guide Float pin Float valve Float pin set screw Body surface Fig 46 Height gauge Fuel
35. ook portion in the reel and wind the spring Space 2 mm between spring and shaft Insert reel O Check to see if hook of spiral spring is hooked correctly to the notched portion of reel by rotating reel by hand Apply good quality grease on the hook portion Illustration a Y Step for Reassembling Tighten reel with binding screw Align washer slot with protrusion of shaft O Apply adhesive to screw for locking SCREWLOCK 1405D Pull out starter rope fully and hook the rope to the notched portion and let the rope be rewound by the force of spiral spring in the direction of arrow by seven turns after that with reel held with fingers pull out the rope to the outside and then rewind the reel slowly Illustration Fig 65 19 8 2 3 Inspection and cleaning after disassembling 1 Check all items for abnormality of parts such as moving parts sliding parts piston piston rings cylinder crankshaft oil seals etc O Check points Phenomenon Piston ring Crankshaft ass y Cylinder Oil seal Bearing Output short o Wear o Wear o Carbon pilling o Wear of tage Defective o Seizure o Stickings o Clogging pulse lip compression o Scratch hole Wrong o Protrusion scuffing main tenance Loose out Internal o Beating noise o Wear of pin Striking sound abnormal Wear and both wear noise bearings of connecting rod 2 Clean outside of the
36. pipe at carburetor side 1 2 3 Dismount carburetor with throttle wire together 4 Dismount insulator Dismount fan case clutch case 2 Dismount fuel tank 1 Dismount recoil starter assembly E 1 Dismount ignition coil with MTI unit and stop 8 socket switch Ratchet small screwdriver screwdriver Clutch case Recoil starter Ignition coil 2 Dismount stop switch from ignition coil plate is come off at same time 3 Dismount MTI unit from ignition coil Centrifugal 1 Dismount clutch clutch 13 socket Ratchet wrench screwdriver 17 socket T180 2 Screw in M6 pan screw to 6 tapped hole and fit screwdriver between protrusion of flywheel and the screw to prevent flywheel from turning 16 Process 7 Ply wheel and Unscrew tighten Caution ing nut until the nut flush with the screw of cra nkshaft when pulling out of flywheel and fan If fan or flywheel is pulled with out this nut the screw of crank shaft will dama ged due to the force of puller 1 Dismount fan tightening nut Procedure Perform in the same manner as dismounting clutch 2 Dismount flywheel tightening nut Fig 61 Fit screwdriver between mounting bosses of the clutch to prevent flywheel from turning 3 Draw flywheel and fan with puller Disassembly procedure Tool
37. rance between crankshaft and connecting rod big end End play of big end Runout of end of crankshaft Spark plug electrode gap Note Replace parts when the dimension exceeds the allowable limit except for spark plug gap which might be adjustable Y 5 STRUCTURE OF CARBURETOR AND INSPECTION AND ADJUSTING PROCEDURES 5 1 Description of components f lt Air qm Fuel Gz Air fuel mixture Venturi Venturi Part Name za Main adjusting screw Throttle valve 17 Overflow valve NA Main diaphragm Overflow valve seat RES Inlet valve spring 12 Needle jet Tickler button 6 Main diaphragm cover Pump cover GE Slow air jet 21 Throttle adjusting screw Choke lever Joint 5 2 Operation of carburetor The operating principle of the carburetor is an application of the Venturi effect The primary functions of a carburetor are to mix the liquid fuel with gas air where both of them are different essentially in their properties in the proper proportions and to supply the fuel air mixture to the engine in accordance with the operating conditions lt gt Air om Fuel Qun Air fuel mixture Adjust nut Venturi Lock nut Metering chamber O Fig 32 1 Pump diaphragm Ej is caused to ope rate by the variations of the pressure in the crankcase of the engine fuel is sucked through fuel pipe joint O and this fuel is fed
38. s function relys on the electronic control As the ignition timing is controlled by means of electronic circuit MTI unit is free from foulness or wear of the contact points and troubles due to the rust which are found in a conventional contact breaker and moreover the more stable sparking performance is obtained for long time Function of semiconductor Before the principle of MTI system is explained the functions of semiconductor elements used for MTI magneto is explained briefly in the following table N type semiconductor When arsentic or antimony element which belongs to V group is added infinitesimally small quantity to the pure crystal of silicon or germanium the created semiconductor is the N type P type semiconductor When gallium or indium element which belongs to I group is added infinitesimally small quantity to the pure crystal of silicon or germanium the created semiconductor is the P type Symbol Function Diode behaves like a so called rectifier Anodi 3 a Ga di Current flows in the direction from A to K o a L however it does not flow in the direction from K Cathode KtoA When the voltage is applied between B and E C Collector SE 3 ei to flow IB the large current IC which is in a B Base l Io proportion to IB flows from C to E A 2 la Y transistor functions as an amplifier to control E OSE Emitter the large current IC by very small current IB Thyrister behaves like a called el
39. stem Engine fires occasionally but does not run Check if oil mixture ratio is correct Change old mixed oil with fresh mixed oil if left for a long time 2 3 months Check air cleaner for clogging Disassembly for cleaning Check for gas leakage from oil seal Check and replace if lip is faulty Check piston rings for sticking or excessive wear Check and replace Open end gap should be 0 6 or less Poor compression Check for excessive fuel suction _ _ _____ Perform scavenging with spark plug removed Spark plug is SCH L Compression Check for gas leakage from cylinder mounting Retighten cylinder mounting bolts check packing system Check for gas leakage from spark plug mounting Check and retighten Check if oil mixture ratio is correct 25 1 change with fresh mixed oil if necessary Be careful of lower mixing ratio a Power output is insufficient Check for misfiring caused by fouled spark plug Check and clean gap 0 7 mm Nee Trouble during Explosion noise is occasionally interrupted Check exhaust port and muffler for clogging with _ Check and clean operation carbon Back fire occurs _ A Check exhaust port and muffler for clogging Check and clean e Fuel tank contains fuel Enaine oz No spark occurs occasionally at A Engine suns s A lu AAA Failure of electrical system See section Check electric
40. tank cap of the engine with diaphragm type carburetor T180P 0 62 g therefore the above mentioned functions are satisfied Symbol Name 1 Cap Valve holder 2 3 Packing 4 Valve umbrella valve 6 Figure shows the flow of air in the umbrella valve gt Exhausted air pressurized Sucked air Fig 25 Handling of cap with umbrella valve In summer when brush cutter engine is stopped temporarily at a break etc during operation place the engine in the position 2 Packing shown in right figure 26 so that the hole E su of the inner packing of the fuel cap is not dipped in the fuel otherwise the fuel may leak from the cap due to the increasing of the inner pressure of the tank Fuel level Priming pump Primer The priming pump is used for feeding fuel to the carburetor at the time of starting of the engine and it is of manual operation Because the inner parts are very small in size care should be exercised not to miss them and not to make a misassembly at the occasions of disassembly and reassembly Priming pump inner parts Packing B FR64285 Pump cap FR64248 Valve seat A FR64244 Rubber cap FR64247 Valve FR64246 Valve cushion FR64281 49 Packing A FR64245 Assembling order 1 Insert packing B into the pump body Insert valve seat A with the seating side facing upward Mount one valve cushion on the pipe joint side Insert packing
41. the carburetor body In addition pay particular attention of the handling of the diaphragm because it is an important part Receive pan Fig 42 Float valve needle valve 1 Characteristics In accordance with the vertical motion of the main diaphragm the float arm operates to flow the fuel from the float valve into the float chamber The fuel flow rate is controlled by the float valve which is linked together with the float arm Hook portion Seat portion rubber Fig 43 2 Adjustment servicing procedure The float valve should operate smoothly and should be airtight when the valve is fully closed If the seat of the float valve is damaged by foreign matters or the stepped wear occurs due to a long period of use can cause overflow and the engine goes malfunction Replace the float valve with a new one in such a case Assembling and adjusting procedures at the replacement of float valve 1 Servicing standard Float arm height from the body surface mm 1 4 to 1 6 Free length of inlet valve spring mm 8 0 9 0 2 Valve opening pressure kg cm Valve closing pressure kg cm 0 5 and over Carburator Pressure gauge Pressure gauge to mesure the valve opening and closing pressures Fig 44 2 Precautions for disassembly amp reassembly 1 On installation of the inlet valve spring the mounting load the for ce that holds the float valve at the time of mounti
42. under pressure to float valve 2 The engine intake pressure is applied to main diaphragm 4 by needle jet and the atmospheric pressure pushes the opposite side of the main diaphragm Float arm is pushed as a result and float valve is lowered Therefore the fuel makes inflow into the float chamber Fig 34 3 The fuel in metering chamber is sucked by the negative pressure in the venturi and jets out through needle jet O and is sucked into the engine in the form of air fuel mixture 4 When the engine stops the negative pressure in the venturi is released float arm O is pushed upward by inlet valve spring 5 and float valve 7 closes Inflow of fuel is stopped as a result and this prevents the overflow of the fuel w When tickler button 9 is pushed and primed with the priming pump the fuel for start ing the engine is fed by pressure to the metering chamber through diaphragm pump 3 and float valve O and mixed with the air of the metering chamber and is discharged from overflow pipe 9 5 3 Characteristics of main parts and adjusting procedures 5 3 1 1 Characteristics E The throttle valve is of piston type and it provides good response to the engine speed from low speed to high speed As the bottom profile of the throttle valve is such that the air inflow sectional area is larger than the air outflow sectional area so the velocity of flow of air fuel mixture is increases Therefore when the valve opening is
43. unt recoil starter O One screw is used for tightening together with top cover Using screw MS x 20 screw 3 pcs screwdriver screwdriver Carburetor Mount insulator o Be careful of direction of installing packing o Using screw M5 x 20 spring washer screw 2 pes Mount carburetor o Be careful of direction of installing packing o Using screws M4 x 25 screw 2 pcs Insert fuel pipe 4 Mount air cleaner o Using screw M4 x 25 screw 2 pcs screwdriver 21 210 amp 240 TRIMMER ENGINE SERVICE MANUAL TROUBLESHOOTING Trouble phenomenon Check point Check if fuel tank contains fuel Supply fuel if necessary Check if fuel oil mixture ratio _ __ Change old mixed oil with fresh mixed oil if left for a long time 2 3 months Check ventilating hole of fuel tank Check and clean Fuel system Check fuel filter for clogging __ Check and clean Check coil with a coil tester Check spark plug for fouling No spark occurs Check and clean or replace Check primary and secondary cords ______ Check if MTI unit is good __________ Check ignition coil for failure _ Check and correct or replace Check plug cap Compare the unit with a new MTI unit and replace it if Does not fire at all necessary Engine is hard to sun 4 Electrical sy
44. x socket head 2 pieces T180 MS hex socket head 4 pieces 4 Muffler 1 Mount muffler body with gasket 10 socket o Bending side of gasket should be located Ratchet toward inside screwdriver o Don t leave flange plate 8 spanner 2 Insert insulating plate gasket into 2 ribs of cooling suction port 3 Insert plate silencing device into muffler body and tighten the cover Screws M6 washer faced nut 2 pcs MS x 25 screw 1 pe 24 Step for Avoid use of woolen waste cloth O Install flywheel on crankshaft aligning flywheel key with crankshaft keyseat surely Fig 75 O Screw in M6 bolt into M6 taped hole on flywheel and fit a screwdriver between the bolt and flywheel s convex portion to prevent crankshaft from turning o Using nut M6 conical nut O Tightening torque 0 6 to 0 8 kg m 2 Install fan o Clean tapered portion of fan and crankshaft Avoid use of woolen waste cloth Fig 76 o Screw in two M6 bolts into M6 tapped holes on flywheel and fit a screwdriver between bolts to prevent crankshaft from turning O Using nut conical nut Tightening torque 0 6 0 8 kg m Reassembly procedure Tools receasembling Flywheel and 1 Install flywheel Ratchet Fan Clean tapered portion of flywheel and 10 socket crankshaft Screwdriver Torque wrench M6 x 25 bolt 25 6 Step for receasembling Centrifugal clutch O Place weight s cast R
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