SPE 40CC Gasoline Engine
Contents
1. A dirty plug will make it difficult to adjust the idle RPM Follow the recommended procedures if any of the following happens Problem 1 The engine hesitates when accelerated rapidly 2 The RPM increases at idling 3 The engine stops when the throttle is moved from high to low Solution Your low speed needle L is too lean Open it up about 1 8 of a turn and try again Problem The idle is not steady Solution Your low speed needle L valve is too rich Close it 1 8 of a turn and try again C High speed Adjustment The high speed RPM and transition performance is adjusted with the high speed H needle When adjusting turn the screw about 1 8 of a turn each time The position of the H needle a according to air temperature and field elevation If your engine is running smoothly then po adjust this needle valve Follow the recommended procedures if any of the following appens Problem 1 Engine stops at full throttle 2 Engine hesitates when accelerated rapidly 3 The engine will not come up to full RPM at full throttle Solution Your high speed needle valve H is too lean Open it up 1 8 of a turn and try again Problem 1 Your engine does not reach full RPM 2 Carbon build ups appear consistently on your spark plug Solution Your high speed needle valve H is too rich Close it up 1 8 turn and try again Trouble Shooting Engine won t start Engine could be flooded2. the engine If you attempt to disassemble or repair this engine yourself it may void the warranty This limited warranty only covers customers in United States
3. Modelpower 26 40CC Gasoline Engine Operator s Manual Specifications Displacement 40cc Horsepower 3 2 HP 2 35KW Ignition Style Auto Advanced Electronic Ignition RPM 1 400 9 000 RPM Fuel Mixed Gasoline 1 45 Break in 1 30 Weight Approximately 51 oz with all accessories Thrust 20 lbs at 7 400 RPM Recommended Props 18 8 22 6 recommend 20 10 Recommended Planes Minimum Aerobatic Plans 13 20 lbs 3D Aerobatic Planes less than 13 lbs SAFETY TIPS AND WARNINGS This engine is designed for experienced radio control model airplane pilots only and could cause serious harm if used incorrectly Always take care when running large gas engines This engine is specifically designed for use on a radio controlled model plane Do NOT use this engine for any other purpose Read user manual in its entirety before commencing use of this engine Always mix fuel in a well ventilated space Never operate this motor alone Any adjustments to carburetor must be done with engine and ignition turned off Any one in the immediate area should wear safety glasses while motor is running Never stand in front of or to the side of propeller while motor is running Always install ignition kill switch which is easily accessible from outside the aircraft for emergency use Do NOT attempt to stop the engine by throwing anything into the path of the propeller Check propeller is secure before each start Ensure idle stop screw is ad
4. firewall must be securely glued to the airplane Use triangle stock and pin the firewall with hardwood dowels to reinforce the firewall glue joints Never install the Modellpower 40cc engine onto a firewall thinner than specified because it may fail due to the power of the engine 7 Cut all necessary clearance and cooling holes in the cowl 8 Make sure the cowl is secured to the airplane and that the spinner to cowl clearance is at least 3mm 1 8 Breaking in the engine The fuel mix ratio is 1 30 for break in Break in your engine for at least 2 hours at RPM 2 000 3 000 Do not adjust the high speed needle on the carburetor to break in the engine If you do so carbon will accumulate in the spark plug and that will make ignition difficult Do nat run at full power for extended periods of time while breaking in your engine Make sure that the engine has adequate cooling While breaking in the engine may run at slightly higher temperatures If you wish to do so you can break in your engine while flying your airplane Just make sure you observe all recommendations above Starting Procedures If this is your first gas engine make sure you have an experienced gas engine pilot stand by to help you Manual Starting Note Use a thick glove to protect your hand while hand starting the Engine 1 The propeller should be installed on the prop spacer so that it is comfortable for you to flip it through compressio
5. justed to allow engine to stop when carburetor is fully closed Ensure spinner cone does not touch the propeller Never operate engine indoors or in a confined space Gasoline is extremely flammable Always allow engine to cool before refueling and keep fuel away from other ignition sources Always perform Radio range check before flying with engine running If glitches are noticed do not fly Check spark plug lead for holes or nicks and check there is no vibrating metal to metal connections Always use a balanced spinner and a balanced prop An unbalanced spinner and prop combination will cause high levels of vibration and may cause the propeller shaft to break Always use a lightweight spinner on your engine Lightweight spinners are considered to be those with a cone wall of 1mm or less Heavy spinners could cause the propeller shaft to break Securely tighten the spinner and prop on the engine to prevent it from being thrown off the engine while running Check the propeller prior to each use and replace if damaged Never use a prop that has hit the ground Even though it may look good from the outside it may be cracked on the inside which may cause it to disintegrate while in use Do not use a nicked cracked or split propeller Keep clear of the prop while motor is running Keep foreign objects away from the propeller Make sure that nothing can be sucked in by the propeller Never start the engine on lo
6. n You also need to position it in a way that when you flip the propeller the magnets are 20 clockwise from the magnet pick up 2 Have someone help you hold the airplane while you start the engine 3 Make sure the ignition is OFF close the choke on the carburetor and open the throttle slightly from the idle position 4 Rotate the propeller slowly about 10 to 20 times more in winter until fuel begins to be drawn into the carburetor Another way to prime the engine is to rotate the prop clockwise from bottom dead center to top dead center compression and then counterclockwise back to bottom dead center repeatedly 5 Switch the ignition to ON 6 Flip the propeller clockwise several times briskly 7 After you hear some initial firing sounds move the choke lever to the OPEN position 8 Set the throttle to a high idle Set the prop so that the magnets are 20 clockwise from the magnet pick up when viewed from the front 9 Flip the prop through compression rapidly If this is done properly the engine will start between the first and the eighth flip of the prop During our testing starting took an average of 3 4 flips 10 After starting let the engine idle for two to three minutes Open and close the throttle slowly until the engine runs smoothly at idle and at full throttle Acceleration should also be smooth 11 If your engine does not start repeat the procedure Engine Adjustments Always make high and low
7. ose gravel or sand Keep onlookers away from the running engine especially small children Make sure the fuel line is well secured to the engine and to the fuel tank so that it won t come off in flight Do not use silicone fuel line because it will be attacked by the fuel Use vinyl or neoprene rubber fuel line Always secure the fuel line away from the cylinder head The engine s heat can damage the fuel line Never touch the engine after a run The engine will be hot and it may burn you Before transporting your model remove all the fuel from the fuel tank and fuel lines Always use high quality oil intended for 2 stroke engines Use only low octane alcohol free gasoline The carburetor diaphragm will gradually deteriorate if you use gasoline with alcohol ethanol gasohol etc You will need to replace the diaphragm in about 80 hours of operation if you use gasoline with alcohol Muffler pressure to the fuel tank is not required Do not install your throttle servo or kill switch servo inside the engine compartment Doing so could cause radio interference Install all electronic radio devices at least 305mm 12 away from the engine The throttle pushrod should be non metallic If the engine is not to be used for more than a month drain the fuel tank and remove any fuel from inside the carburetor Do this by running the engine at idle until it quits by running out of fuel To keep gasoline in
8. rent or future liability for personal injury property damage or wrongful death caused by negligence PARTS LIST Modelpower 40cc Engine w Muffler Ignition Module Propeller Flange with Propeller Washer Propeller Bolt 4 pcs 6mm x 10mm socket head cap screws with Lock Washers and Flat Washers 4 pcs 6mm x 12mm socket head cap screws with Lock Washers and Flat Washers Spark Plug Wrench 4mm Allen Wrench 4 pcs Stand Off Features Automatic Ignition Timing The Modelpower 40cc features an electronic ignition system that advances the ignition timing as the engine RPM increases This insures retarded ignition timing at low RPM for easy starts and good low end engine performance and advanced timing at high RPM for good high end power The ignition module is waterproof and vibration proof The ignition module runs on any 4 8 6V battery recommend 6V for better performance The current consumption is approximately 188 mAh Spark Plug The recommended spark plug is a Champion RDJ 8J To avoid improper operation or possible engine damage do not use any other type of spark plugs The plug gap should be 0 4mm to 0 6 mm 0 016 to 0 024 If the plug gap is incorrect adjust it with a spark plug gapping tool wash it with gasoline and allow it to dry completely before you reinstall the plug in the engine Note If you want to check if the spark plug works remove the spark plug from the engine to the col and make sure
9. side the carburetor over an extended period of time will damage the diaphragm valve and clog passages inside the carburetor Because the carburetor is more complicated than those used in glow engines keep the fuel clean by using a fuel filter Use a filter intended to be used with gasoline engines Metal filters intended for glow engines are too coarse and will not screen out finer particles Always filter your fuel by using an appropriate filter before putting it into the airplane s fuel tank If you intend to run this engine on an engine stand or on any other rigid mount use rubber mounts The crankcase and other parts of the engine may crack if you do not provide some kind of vibration absorption mechanism A rubber mount is not necessary if the engine is mounted on a model airplane Gasoline is extremely flammable Keep it away from an open flame excessive heat or sources of sparks Do not smoke near the engine or the fuel tank An important notice to our customer This engine is NOT a toy Any test flight and later flight by this engine are done at your own risk Please enjoy your hobby and fly safely Waiver This waiver means that if I the buyer of this engine am involved in any claim or suit will not sue Maxford USA or any of its representatives am aware that modeling may present hazards to participants and spectators When purchasing this engine exempt waive and relieve Maxford USA from all cur
10. speed needle adjustments with the engine shut off Also make sure the ignition is OFF Adjust the needle marked H for high speed RPM Adjust the needle marked u for low speed RPM A Normal high and low speed needle settings It is not necessary to change the needle settings if the engine runs smoothly Normally only the H needle will need adjustment from time to time and only by a small amount H Open the needle 2 turns from the closed position 1 4 of a turn in winter L Open the needle 1 3 8 turns from the closed position 1 4 of a turn in winter Only adjust the high and low speed needle within the above range WALBRO CARBURETOR INSIDE VIEW WALBRO CARBURETOR OUTSIDE VIEW Choke ontrol ARM Hight speed mixer i Low speed mixer Thruttle s g control ARM A k N Sealed pipe line _ Mixed air outlet Choke Presh air inlet B Idie adjustment Note Do not confuse the idle screw with the low speed needle L The idle screw physically adjusts how much the carburetor valve can close The low speed needle L adjusts the gasoline to air mixture when the engine is running at low RPM If your engine appears to work correctly except that the low RPM are not as low as you want them to be and then adjust the idle screw If your engine behaves erratically at low RPM then adjust the low speed needle L When adjusting turn the screw about 1 8 of a turn each time
11. the engine only needs choking for the first start of the day Low battery voltage Check tank venting clunk position fuel flow Check fuel lines for kinks holes or damage Check fuel flow while flipping Check throttle is open Ensure prop is flipped over with authority Motor runs poorly Engine could be too rich Ensure both needles are adjusted correctly Ensure carburetor has not become loose causing air leakage Check all ignition connections and switches Ensure fuel is freshly mixed and is free of humidity and water Warranty Your Modelpower engine and ignition system are covered with a two 2 years warranty from the a purchase for defects in workmanship or materials During that period Modelpower Engines repair or replace without service charge any product deemed defective due to Ss You will be required to provide proof of purchase date and product serial number ae not covered under warranty you will be notified of the charges This warranty does not cover Any damage caused by crash abuse misuse alteration or accident Damage caused by customer disassembly tampering use of substandard fuel use of incorrect accessories spark plug prop etc Damage caused by improper handling operation maintenance modifications fuel or crash Any modifications to disassembly of engine or ignition or any use of the engine for which it is not specifically intended will automatically void the warranty of
12. the metallic threaded end of the spark plug touches the engine Pe aro rapidly through top dead center and check for a spark This procedure only ER as there is too much light outside to see the spark The various spark plug manufacturers have much information on their web sites regarding spark plug performance health For more information check http Awww championsparkplugs com sparkplug41 1 asp Propeller Always use a well balanced high quality propeller Recommended Props 18 8 22 6 recommend 20 10 Check the Engine before you Install Check to see that all screws and bolts are tight Check carefully for any cracks broken or missing parts Tighten or replace before proceeding Install the engine mounting stand offs on the engine using four 6mm x 12mm 3 16 x 15 32 socket head cap screws Secure the ignition control module ground wire to the engine using one of the 6mm x 12mm 3 16 x 7 8 socket head cap screws Connect the ignition control module to the pick up sensor The connector is polarized and will only plug in one way Connect a kill switch to the ignition control module It is recommended to install a manual switch and a servo operated switch Connect the ignition module battery Any 4 8 6V 500mAh and above battery will work well for this recommend 6V for better performance The approximate current consumption of the ignition switch module is 188mAh Always check the battery voltage before yo
13. u try to start the engine If the battery voltage is lower than 3V the ignition will not work properly Install the engine on your airplane Note The length of the engine from the back on the engine mount to the propeller washer is 154mm 6 0625 1 Use the supplied mounting template on the back cover of this manual to drill the engine mounting bolt holes and the necessary clearance hole on the firewall 2 Install the engine on the firewall using four 6 mm x 12mm or 10 24 x 3 4 socket head cap screws four 10 flat or lock washers and four 10 blind nuts Use thread locking compound for security 3 Install a manual and radio operated kill switch GPMG2150 Install a kill switch servo at least 305mm 12 away from the engine 4 Install the throttle servo at least 305mm 12 away from the engine Make sure that you get the carburetor s full range of rotation with your servo travel 5 Install the ignition module securely in the airplane forward area lt is recommended that a thin piece of foam rubber be placed between the module and the mounting surface and that rubber bands are used to hold the module in place 4mm 5 32 screws and washers can also be used to secure it in place but soft mounting the module is always the best choice 6 Secure all connections with shrink tubing Note The Modelpower 40cc engine must be installed on a 9mm 3 8 lite ply firewall or on a 6 4mm 1 4 birch ply firewall The
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