Great Power Engine GP-88 EVO Owner's Manual - Page 7

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Trouble Shooting I ( The engine will not start)

1.! Check the battery voltage. It should be over 6.6+ when checked under load. Also check

all the ignition connections, wiring and switches.

2.! Examine the fuel system for clogs, jams or a bad fuel line. Make sure the propeller is

flipped over with authority. Check the carburetor mount is not loose, as air leaks may

cause the engine to not start.

3.! If too much fuel is dripping from the carburetor, the engine may be overflowed. If so,

you can:(a)Turn off the ignition system and ensure the choke and throttle are opened

completely. (b) Flip the propeller about 10 times at full throttle. (c) Close the throttle to

idle position and follow the starting procedure again.

For single cylinder engines (GP-38, GP61 and GP88) you can also unscrew the spark

plugs and check its contacts, and dry or replace the spark plug(s). Further starting should

only be done with the throttle is turned down. (If the plug(s) is/are dry, then it may be

that not enough fuel has been drawn into the carburetor. In that case).

4.! If the engine stops soon after starting even when the starting procedure has been

followed, it is probably because the low needle is too lean. Turn the low needle

counterclockwise for approximately 1/8of a turn.

5.! If the engine does not reach a normal RPM at full throttle, shift back the GP

muffler(s) to the original needle setting. If the problem remains, it may result from(a) a

low battery;(b) the wrong needle setting (in which case we suggest adjusting 1/8 of a turn

at a time until the RPM reaches a peak); (c)the diameter of the propeller is larger than

recommended, in which case the RPM will be lower

may not be correct

pipe, make sure the length of the header, and the needle setting suit the pipe and header

you are using. If you are not sure about the length of the header, contact your dealer. We

are happy to be at your service); (f) bad ignition timing and a malfunctioning spark plug,

which will cause a lower RPM as the crankshaft may be twisted.

Caution: If the engine is running roughly or vibrating strongly: (1) Make sure the

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Please refer to

Choosing a Suitable Propeller

Please refer to

Fuel and Oil Mixture

Trouble Shooting

; (e) the muffler/ pipe system affecting the RPM (if you are using a

; (d)the gasoline and oil mixture