Service-manual - SOLO Kleinmotoren GmbH
Contents
1. The ignition timing 22 BTDC can be checked with the strobe light while the engine is running in idle Therefore there are marks on the pick ups and the rotor which have to match Then the correct angle can be checked statically edition 2 dated 1 10 2009 Seite 7 Baureihe G Service Manual KLEINMOTOREN 2 625 02 GMBH 2 625 02 i 4 5 2 Troubleshooting ignition systems e No spark on one Ignition circuit o Wire defect on one wire from the pick ups or at a wire to the ignition coil o Wire from one pick up to the ignition coil has connection to ground o The shut off wire for one circuit has connection to ground o The relating ignition coil has a defect This can be checked if the wires to coil 1 are exchanged with the ones to coil 2 If the defect is moving to the other circuit the coil has to be replaced o If the defect is not moving then a coil in the stator or one of the pick ups have to be replaced e No spark on both ignition circuits o Wire defect at the wires to the ignition coils o Wires from the pick ups or from the generator coils to the ignition coils have connection to ground o Shut Off wires have connection to ground No charging current Wire defect at the wires from the coils to the stabilizer Wires to the stabilizer have connection to ground Plugs at the stabilizer have a defect Are all previous defects not present the stabilizer has to be replaced 0000 edition 2 dated 1 10 202. Loctite 574 Two stroke oil Torque wrench 12 Nm Loctite 274 Piston ring clamp bent out of spring steel Torque wrench 20 Nm Pressure tester Baureihe SOLO 2 ee Service Manual KLEINMOTOREN 2 625 02 GMBH 2 625 02i m should not exceed 0 1 bars per minute 10 Assemble stator of the ignition system Secure Torque wrench 12 Nm all bolts with Loctite Loctite 270 11 Assemble flywheel Clean cone and flywheel Torque wrench 80 Nm with thinner first Assemble exhaust manifold with gaskets Torque wrench 20 Nm Loctite 270 1 1 1 Es Assemble air filter on carburettor lial essen at EN pressure of 1 bar No pressure loss allowed edition 2 dated 1 10 2009 Seite 19 Baureihe 2 625 01 SOLO Service Manual KLEINMOTOREN 2 625 02 GMBH 2625021 6 Notes edition 2 dated 1 10 2009 Seite 20
3. 75 of the fuel at wide open throttle This jet cannot be changed Any fine adjustment can be conducted with the needle marked with H The normal setting of that needle is one turn open Typically the setting should be slightly leaner 7 8 turns open The low speed needle is marked with L The typical setting is 1 2 turn open and should not be changed edition 2 dated 1 10 2009 Seite 12 Baureihe 2 625 01 2 625 02 2 625 02 SOLO Service Manual KLEINMOTOREN GMBH 4 7 2 Specialties MIKUNI BN 38 34 55 The carburetor has an exchangeable main jet marked for 2 625 01 by 127 5 engine 2625 02 has 117 5 This jet controls 75 of the fuel at wide open throttle The carburetor is adjusted by the manufacturer in a way that the needle which is accessible from outside marked H the engine can be adjusted leaner up to 1 4 of a turn The needle top has a plastic part which allows an adjustment of 1 4 of a turn only The needle must be in the left counterclockwise end position The leaner adjustment is only necessary on airfields above 1 000 m above sea level The low speed needle is marked with L The typical setting is 1 2 turn open and should not be changed edition 2 dated 1 10 2009 Seite 13 Baureihe 2 625 01 SOLO Service Manual KLEINMOTOREN 2 625 02 GMBH 2625021 4 7 3 Adjustment of the carburettors The adjustment is almost identical with both types of carbure
4. be replaced To conduct this the inner rings must be grinded carefully on one spot until only 0 3 mm of wall thickness is left Then they can be cracked by using a chisel After that they can be slipped off the shaft e Check true running on a centering device The eccentricity at the bearings should not exceed 0 04 mm If the eccentricity is more the crankshaft can be adjusted by the manufacturer e Check axial play at the con rod bearings The play must be between 0 35 und 0 5 mm 4 5 Ignition system 4 5 1 Engines 2625 01 and 2625 02 Following ignition systems are used ISKRA Magneto Ignition with generator 12 V 70 W for the engine 2 625 01 up to serial No 12 e DUCATI Magneto Ignition with generator 12 V 150 W for the engine 2 625 02 from serial No 1 and for the engine 2 625 01 from serial No 13 Both ignition systems have two independent ignition circuits 4 5 1 1 Specialties of the Iskra ignition system This ignition system has a stator which can be adjusted on the crankcase The proper ignition timing is adjusted if the stator is turned as far as possible against the rotational direction of the engine anti clockwise The ignition timing can only be checked with a strobe light while the engine is running in idle 4 5 1 2 Specialties of the Ducati ignition system The ignition timing is fixed and cannot be adjusted The proper position of the external pick ups for the two circuits stand for the ignition timing
5. be conducted with this pump First remove the diaphragm cover and switch on the pump No fuel should flow out of the valve Adjust the carburetor as described above e Setting too rich Rich setting can be detected if power is low RPM shaking of the engine and loss of RPM below 3 000 m above sea level O O Check typical setting of the adjustment needles first Replace air filter or clean filter mesh wash with fuel and dry with compressed air Check the proper sealing of the inlet valve It is necessary to use the pressure tester see above Disconnect the fuel line and apply 0 4 bar of pressure to the carburetor The pressure loss should not accede 0 1 bars per minute If an electric fuel pump is installed the check can be conducted with this pump First remove the diaphragm cover and switch on the pump No fuel should flow out of the valve Adjust the carburetor as described above edition 2 dated 1 10 2009 Seite 15 Baureihe 2 625 01 SOLO Service Manual KLEINMOTOREN 2 625 02 GMBH 2625021 4 8 Trouble shooting at the fuel injection system only 2625 02 i 4 8 1 Engine does not start No fuel Check the fuel lines and the function of the fuel pump No spark at both spark Weak battery charge the battery plugs Broken wire No spark at one spark Spark plug defect Ignition coil defect Ignition wire broken plug 4 8 2 Failures during operation Not enough coolant Water pump defect Fuel press
6. speed screws should be adjusted so that the EGTs reach 230 20 In order to have a good start the air filters can be removed first and the two throttles can be so adjusted that the opening angle is identical at 1 mm open e At wide open throttle measure the EGT and wait until that temperature reaches a stable max value After approx 3 minutes The carburetor should be adjusted so that the EGT is between 630 and 640 Don t adjust too early because you then could set the carburetor too lean The difference between the two EGTs should not exceed 308 edition 2 dated 1 10 2009 Seite 14 Baureihe 2 625 01 2 625 02 2 625 02 i SOLO Service Manual KLEINMOTOREN GMBH 4 7 4 Troubleshooting at the carburettors e Setting too lean Lean setting can be detected if the engine does not accelerate properly or if the EGT is too high O O O Check typical setting of the adjustment needles first Clean the carburettor after removing the diaphragm cover The clean remove idle and high speed adjustment screws Clean all openings with pressurized air Clean also the fuel inlet with pressurized air After reassembly of the inlet needle the proper sealing of the valve has to be checked It is necessary to use the pressure tester see above Disconnect the fuel line and apply 0 4 bar of pressure to the carburetor The pressure loss should not accede 0 1 bars per minute If an electric fuel pump is installed the check can
7. the ring with flange then the spacer ring and then the ring without flange All three rings positioned next to each other Clean crankcase with thinner Remove possible rests of former gaskets completely Apply Loctite 574 on contact surfaces of the crankcase halves and put crankshaft into the lower half Before that apply two stroke oil on all bearings Assemble all rings and seals together with the crankshaft Mount other half of the crankcase plus the 4 bolts on both sides with Loctite and tighten with a torque wrench Attention On engines with double bearings mount the steel liner with the two lower bolts first Then tighten the four bolts on the sides of the crankcase Then tighten the 4 bolts on the front of the steel liner Apply Loctite 274 on all Assemble piston with rings to the connecting rod and secure with piston pin locks Push piston pin into piston by hand Apply two stroke oil on all parts Assemble intake manifold on engine 2 625 01 or exhaust manifold on engine 2 625 02 with gaskets in order to get cylinders in line Then tighten the 4 nuts on each cylinder Plug all openings Intake and exhaust ports with steel parts and rubber parts in the shape of the flanges Check if the engine block is sealed with 0 5 bar pressure Pressure loss edition 2 dated 1 10 2009 Seite 18 Before assembly apply two stroke oil on crankshaft bearings pistons and piston pins Tool aid Heating plate with temperature control
8. 09 Seite 8 Baureihe 2 625 01 2 625 02 2 625 02 Service Manual KLEINMOTOREN SOLO GMBH 4 5 3 Wire diagrams Iskra and ducati ignition systems e Iskra ignition system E red rot reol E Bo E Bo 15A n H 3 w S w 15 SIE ZI 2 olv le lt lt clo 2 2 2 2 ge lb yellow 7 G we je A ae G L L d E LO L L L 7 7 5 4 io N N A N ge lb schworz yellow klack No L Pe ie E U ao co U U U U 0 amp w a a D Se i R lt A ode Kr Be EnA Pose ee 30 oo OD 30 oo OO ee ar s a 55 55 a 55 30 oa DU K Y C ec cic Y C eg ce e gt Dus en DA 0 Sn SS Aa S G U DA 0 wv 3 Gh al m gt Dm gt a 7 a man won Tia SI No Wo me Vo NO Ducati ignition system Ve LSS E P white CDI 15A rot weiss N rot red white J red arun green a gt U ra a ge lkb weiss yellow N yhite CDI aw grau G v rot gre 4 4 red x L L arun k g
9. 6 4 8 2x HIE eT yie EST see ee ee a ee een een 16 48 3 Fare memory era iaei 16 48 4 gt Sollware eT Ne EGU ren einen een 16 5 Assembly OF INS enges ee en 18 6 NOTOS ee N DES 20 1 General hints and description of the engines This service manual shall give the engine specialist necessary hints for repairs and overhauls for the engine and help him solving specific problems General knowledge of two stroke engines should be present This Service manual is valid together with the engine manual and the spare parts list Attention Because this engine is used as a certified engine for motor gliders the national authorizations of the specific certifying staffs must be maintained edition 2 dated 1 10 2009 Seite 2 Baureihe G Service Manual KLEINMOTOREN 2 625 02 GMBH 2 625 02 i Description of the engines The aircraft engines 2625 01 2625 02 and 2625 021 are based on the same engine block and differ only by different carburetors or at the engine 2 625 021 by the use of an electronic fuel injection The engines 2625 02 and 2625 02i have a different cylinder with a different port timing of the intake port Allthree engines are water cooled two cylinder two stroke engines with piston ports They have a displacement of 625 cm with a stroke of 69 mm and a bore of 76 mm They are lubricated by a fuel oil mixture For all engines a breaker less double ignition is used Aircraft engine 2625 01 This engine has one d
10. iaphragm carburetor which feeds both cylinders and a take off power of 39 kW at a speed of 6 250 RPM Aircraft engine 2625 02 This engine has a different intake port timing compared to the engine 01 and two diaphragm carburetors The take off power is 47 kW at a speed of 6 500 RPM Aircraft engine 2625 02i This engine is based on the engine 2625 02 which is converted according to the Service bulletin TM 4603 3 to the version with electronic fuel injection The carburetors and the ignition system are replaced by this electronic fuel injection system into the manifolds and also by an electronic ignition system The former ignition system is replaced by an alternator which supplies sufficient electric energy to operate the fuel injection and the ignition The take off power is 50 kW by a speed of 6 500 RPM An ECU is controlling the injected amount of fuel and the ignition timing based on the engine speed the position of the throttle valve the engine temperature the ambient pressure and the outside air temperature This guaranties that the engine is running under optimal conditions In order to achieve maximum security in case of a breakdown of the ECU a simple redundancy system is installed which supplies the engine with two additional injection valves An ignition module which is driving the two coils of the engine is integrated in this system The system is controlled by an additional RPM sensor Other sensors are not necessary The engi
11. in the ECU which guarantee a limited operation of the engine Only if the speed sensor fails the engine stops The ECU supplies constantly values about speed temperatures and the condition of the sensors via a CAN bus which can be displayed to the pilot In addition to that there is a failure memory which can be read by the manufacturer With this memory it can be detected if one or more values have exceeded their limits Short above the maximum engine speed the ignition is cut off The starting of the engine must always be in idle position A choke or other fuel enrichment systems are not necessary The ECU has a serial interface which allows the detection of the status of the ECU in operation Special software is necessary for that The settings and the access to the failure memory are protected by a password 2 Necessary tools In order to conduct an expert repair or check it is necessary to use functional tools in good condition Except the usual tools present in each engine workshop the following special tools are necessary pee el 00 80 529 Puller for hub 2 00 80 530 Puller for Ignition flywheel Bet 00 80 314 ee Stroke Other oils with specification JASO FC or FD BT 274 DEE ZN TS S O 8 footie 574 edition 2 dated 1 10 2009 Seite 4 Baureihe 2 625 01 SOLO Service Manual KLEINMOTOREN 2 625 02 GMBH 2625021 3 Disassembly of the engine Pos Clean engine before disassembly Disassemble carbureto
12. ne management system is consisting of the following components e Pre filter fuel pump micro filter and fuel pressure regulator for the fuel supply The fuel pressure in the system is regulated by the pressure regulator at 3 bars The fuel line from the pressure regulator back to the fuel tank is pressure less e Engine Control Unit with ignition modules and a pressure sensor which measures the atmospheric pressure In the ECU the maps for fuel injection and ignition timing are stored Based on the air pressure and the air temperature the ECU calculates the correct amount of injected fuel e The engine has 5 sensors Facing the flywheel of the alternator there is an RPM sensor At the throttle valve there is a sensor which measures the opening of the shutter valve At the rear cylinder head there is a temperature sensor measuring the coolant temperature Near the air filters there is a edition 2 dated 1 10 2009 Seite 3 Baureihe SOLO G Service Manual KLEINMOTOREN 2 625 02 GMBH 2 625 02 i sensor measuring the intake air temperature In the ECU there is a pressure sensor measuring the atmospheric pressure e A double throttle valve assembly and one injection valve each which are controlled by the ECU e Two double ignition coils with ignition wires leading to the front and rear cylinder each The engine is running with minimal power loss fired by only one coil If a sensor fails or a wire breaks standard values are stored
13. r from manifold Open end spanner 13 mm and coal off flywheel with suitable puller Disassemble the stator of the ignition system completely If the engine has an ignition system from Ducati disassemble also the plate with the pick ups Loosen hub at the front end of the crankshaft and pull off with the suitable puller Puller SOLO No 00 80 529 10 Loosen nuts at the bottom of the cylinder and Open end spanner 12 mm lift cylinder carefully 11 Disassemble the piston pin lock carefully Push piston pin out of the piston by hand Loosen the 4 bolts on the side of the crankcase and move the two halves of the crankcase apart carefully so that they don t get out of line Clean both parts ATTENTION ON ENGINES WITH DOUBLE BEARING ON THE DRIVE SIDE LOOSEN THE FOUR BOLTS AT THE FRONT END FIRST 13 Take off seals locks and outer rings of the roller bearings by hand eT Ltt eyi GERNE Mark cylinder head cylinder and piston for matching edition 2 dated 1 10 2009 Seite 5 Baureihe 2 625 01 SOLO Service Manual KLEINMOTOREN 2 625 02 GMBH 2 625021 4 Check of the individual parts 4 1 Cylinder heads e Clean the inside part of the cylinder head from coal Fuel can dissolute rests of burnt oil Heavy oil carbon deposit can be removed with a steel brush e Check both threads for the spark plugs if damaged e Clean the sealing surface 4 2 Cylinders e Check the cylinder surface Coating visually if
14. reen Be kS 9 a L L gt x a u a rot we ss red white ks Z L 4 7 7 F F 4 x A Z La a fe lt co au au uU wm Ow S oF in a t Gog one ame gt Ic Oz Oz vv vu vw vu ce ie 5 u Ln TSO DS TS TO vu DU E a ec one ele Eure PP 2 MM B 08 Ous allen ed Soa vor m D D gt gt gt gt gt mm wow ie zy NO NO NO NO edition 2 dated 1 10 2009 Seite 9 Baureihe SOLO 2 625 01 i 2 625 02 Service Manual KLEINMOTOREN GMBH 2 625 02 i 4 6 Engine Control Unit ECU The following wire diagram shows the connection between the ECU and the various components of the engine The functions of the ECU where described in chapter 1 The wire diagram of the redundancy system is shown below 4 6 1 Wire diagram ECU 2625 02 i CANH CANL 31 Butterfly valve 25 7 Computer interface 4 2 3 2 3 5 Shielded S 36 37 21 3 52 R 53 54 55 E LAAJ OL Ad Pa Ignition switch 18 Ind Sensor T Air T Water 31 31 15 31 Ground Ground 15 Switched positive Fuel pump Battery 30 Continous positive 31 Ground 4 High voltage ignition wire 31 31 Plug connection ECU 1 Ground throttle valve transducer 41 Ignition coil 1 Alternator side 20 5 Volts throttle valve transducer 42 Ignition coil 2 Drive side 2 Signal throttle valve transducer 10 Relay fuel pump 7 CANL CAN bus 25 CAN H CAN b
15. ressure int 978 hPa 2 92 V consumption 20 3 air pressure ext 983 hPa 3 00V temperature int 28 4 C 4 49 V calc of injection time Js calc of ignition angle deg air mass ignition angle from table er correction alr temperature base time air pressure ext engine temperature engine temperature lambda control acceleration function input acceleration switch time injection time field changing ignition angle Check the following indications No Of rev errors If the number of rev Errors increases during starting or engine operation a failure of the speed sensor can be indicated Check sensor and wires Throttle potentiometer In idle position the value should be around 10 degrees and during full throttle 90 degrees With other readings the sensor is defect Engine temperature Check the engine temperature with a second gauge if it is plausible Air temperature Check the air temperature with a second gauge if it is plausible Air pressure int This value can be checked with an altimeter Other sensors are not connected edition 2 dated 1 10 2009 Seite 17 Baureihe 2 625 02 i 2 625 01 2 625 02 Service Manual SOLO KLEINMOTOREN GMBH 5 Assembly of the engine Operation Heat inner rings of roller bearings up to 180 And slip on free ends of the crankshaft The flange of these rings has to be next to the crank web Attention For engines with double bearing first slip on
16. solo service Service manual For the aircraft engines solo 2 625 01 solo 2 625 02 solo 2 625 02i LO T O oO T nn em O SE o or E O O a T O C 7 09 e P Bed ELD ED L aD S C O O OS5SN lt x Fe oO NnOFL Edition 2 dated October 1st 2010 Baureihe G Service Manual KLEINMOTOREN 2 625 02 GMBH 2 625 02 i Table of contents 1 General hints and description of the engines eee eee eee eee eee 2 2 NECESSARY Dos en 4 3 Disassembly Ol INe engine ass 5 4 Check of the individual pars sees eee eee eee 6 41 Gylinder headset 6 E e lee see ee u ig 6 4 32 Piston and S PSONN S nn renee ede eres 6 4 4 Grankshall una ennnennannn 7 4 3 Nonon SYSIEM TTT 7 4 5 1 Engines 2625 01 and a ee 7 4 5 2 Troubleshooting ignition Systems eee eee eee eee e 8 4 5 3 Wire diagrams Iskra and ducati ignition Systems esse eee ee eee ee 9 4 6 Engine Controlnit ECU near 10 4 6 1 Wire diagram ECU 2625 02 1 ana In 10 4 6 2 Wire diagram redundancy system of the engine 2625 02 l sese eee 11 47 EGAL DULE Or Ste ee Ra EEE 12 4 7 1 zSpeciallies MIRUNLBN DS nr rel 12 4 7 2 Specialties MIKUNI BN 2386 24 55 eee eee eee 13 4 7 3 Adjustment of the carburettors sese eee eee 14 4 7 4 Troubleshooting at the carburettors eee eee eee eee e e 15 4 8 Trouble shooting at the fuel injection system only 2625 02 I eee eee eee e 16 4 8 1 Engine does NOt Sta ansehen nenn 1
17. there are damages Scratches e Check the diameter of the cylinder in direction of the crankshaft and rectangular Dimension New Wear limit 10 mm below top 76 mm 0 005 76 01 mm 30 mm below top 76 mm 0 005 76 01 mm 25 mm above bottom 76 mm 0 01 76 02 mm e Check visually the grooves for the o rings at the top of the cylinder e Check the entire cylinder for cracks or damages of the sealing surfaces e Remove oil carbon deposit on the coating and in the exhaust port 4 3 Piston and piston rings e Remove oil carbon deposit on the piston top carefully e Check piston diameter Measure the diameter rectangular to the piston pin boss Dimension Wear limit Di DN 22 mm above 76 mm 0 06 75 9 mm bottom D2 59 5 mm above 76 mm 0 08 75 8 mm bottom D3 69 mm above 76 mm 0 093 75 7 mm bottom e Check vertical play of the piston rings New 0 05 mm 0 10 mm wear limit 0 20 mm e Check wear of the piston rings Distance between the two ends if the piston ring is mounted into the cylinder New 0 2 0 35 mm wear limit 0 8 mm No light has to be seen between cylinder wall and piston ring if the cylinder is hold against a lamp edition 2 dated 1 10 2009 Seite 6 Baureihe G Service Manual KLEINMOTOREN 2 625 02 GMBH 2 625 02 i 4 4 Crankshaft The Crankshaft can be disassembled only by the manufacturer The main bearings at the drive side or the ignition side roller bearings can
18. ttors Before you start the basic needle adjustment should be made see chapter 4 6 1 and 4 6 2 Engine 2 625 01 with one carburettor e The Exhaust gas temperature EGT can be measured through a hole in the exhaust manifold which is shaped like a Y 100 mm after the cylinder flange with a Ni CrNi thermo couple It is enough to measure in one of the two legs of the manifold e Start the engine and warm up the engine until the water reaches a temperature of 400 e Adjust the idle speed with the idle speed screw until the engine runs between 2 300 and 2 600 RPM e At wide open throttle measure the EGT and wait until that temperature reaches a stable max value After approx 3 minutes The carburetor should be adjusted so that the EGT is between 630 and 640 Don t adjust too early because you then could set the carburetor too lean Engine 2 625 02 with two carburettors e The carburetor adjustment is almost identical for both types e The typical setting should be made first see above specialties e The Exhaust gas temperature EGT can be measured through a hole in the exhaust manifold which is shaped like a Y 100 mm after the cylinder flange with a Ni CrNi thermo couple It is necessary to measure in both legs of the manifold e Start the engine and warm up the engine until the water reaches a temperature of 400 e Adjust the idle speed with the idle speed screw until the engine runs between 2 300 and 2 600 RPM Both idle
19. ure not Engine overheats sufficient Engine does not reach Fuel pressure not sufficient Fuel filter clogged Throttle full power valve does not open completely Spark plugs defect Fuel pump defect 4 8 3 Failure memory The ECU has a failure memory which detects failures at the system and stores them Only the manufacturer can read the memory For an analysis the ECU has to be sent to the manufacturer 4 8 4 Software for the ECU On the page http www trijekt de downloads 10 html software Win trijekt can be downloaded which allows to connect a computer to the serial interface of the ECU After installing the software the status of the ECU can be checked Connect the serial cable to the computer and the ECU and start the software Then switch the ignition ECU to ON If the software shows connected the status of the sensors and the ECU can be checked edition 2 dated 1 10 2009 Seite 16 Baureihe 2 625 01 SOLO Service Manual KLEINMOTOREN 2 625 02 GMBH 2625021 The status window shows the status of the sensors the injection time and the ignition angle during engine operation status rotation speed 3017 lambda 1 0 70 injection time 6578 throttle pot 9 deg 090V 33 0 air mass sensor 508 0 2 49 V ignition angle 22 battery voltage 12 24 Volt idle controller 2 engine temperature 88 C 0 76 VY pressure load 42 air temperature gt a 0 91 Y no of rey errors 3 0 air p
20. us 53 RPM transducer Induktive 54 Ground RPM transducer 8 Computer interface Rxd 26 Computer interface Txd 36 Ground 54 Ground 17 Injection valve 1 Alternator side 35 Injection valve 2 Drive side 37 Switched positive 55 Switched positive 21 Temperature transducer air Temperature transducer coolant 18 Continous positive edition 2 dated 1 10 2009 Seite 10 Baureihe 2 625 01 2 625 02 Service Manual 2 625 02 i SOLO KLEINMOTOREN GMBH 4 6 2 Wire diagram redundancy system of the engine 2625 02 i GND GND GND BAT BAT RPM ZS ZS EV Y Y en 8 Ind Sensor 15 Switched positive Fuel pump 30 Permanent positive 31 Ground 4 High voltage ignition wire 31 Steckerbelegung TBD BAT _ Switched positive BAT Switched positive GND Ground GND Ground EV Injection valve 1 and 2 ZS Ignition coil ZS Ignition coil RPM RPM sensor GND Ground RPM sensor edition 2 dated 1 10 2009 Seite 11 31 Battery 31 Baureihe SOLO 2 an Service Manual KLEINMOTOREN 2 625 02 GMBH 2 625 02i 4 7 Carburettor Two types of carburetors are used e MIKUNI BN 38 Diaphragm carburetor without fuel pump e MIKUNI BN 38 34 55 Diaphragm carburetor without fuel pump The engine 2 625 01 has one carburetor The engine 2 625 02 has two carburetors 4 7 1 Specialties MIKUNI BN 38 The carburetor has an integrated main jet which controls about
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