4
1) Before attempting to start your engine make sure that the ignition is switched off, the choke valve is
closed and the throttle valve is about half opened. Then turn the engine 3–4 revolutions, assuming
the engine has not been flooded.
2) When you are ready to start the engine switch the ignition on, open the choke valve and set the throttle at a
slightly high idle speed. Be sure to have a helper hold the model securely. Using an electric starter begin cranking
the engine. It should fire within seconds of applying the starter. Allow the engine to idle for 30–45 seconds.
3) If the engine does not start even after using the starter to crank the engine a second time, open the
throttle to maximum, turn off the ignition and turn the engine about 4 revolutions. Switch the ignition on
again, then restart the engine with throttle at a fast idle position and the choke valve set open.
4) At this point if the engine still will not start, unscrew the spark plug and check its contacts. Clean any
possible excess fuel (i.e. an indication of engine flooding) and screw it in again. Further starting should only
be done with the throttle at idle position. If the plug is dry then probably not enough fuel has been drawn into
the carburetor. If that is the case, check the fuel feed and then return to the instructions given in paragraph 1.
After starting and warming the engine for 30–45 seconds adjust as follows:
Step I-
Move the throttle to 2/3 high throttle position quickly (fast acceleration). Then repeat three times
— if the engine accelerates smoothly go to Step III. If acceleration is not smooth go on to Step II.
Step II-
Faulty acceleration and a tendency to quit is usually attributable to a poor fuel mixture in the
medium rpm range. Stop the engine and recheck the fuel feed (the fuel line must not be pinched or broken).
Restart the engine and test acceleration again. If the problem persists adjust the carburetor. Open the low
speed needle by 5 minutes and retest. If acceleration is smooth, open the needle by another 3–5 minutes
— this should be done because the needle was previously set too lean; if atmospheric conditions changed
recently you may have to re-adjust the needle.
If the engine continues to not accelerate properly open the low speed needle by 10 minutes. If the engine’s
operation does not improve, shut it off and check the basic setting, restart the engine and test the
acceleration. If the engine runs correctly go to Step III. If it continues to not accelerate properly, open the low
speed needle by another 10 minutes. If acceleration is faulty, the defect is likely to lie somewhere other than an
adjustment.
Starting the Engine
Evolution Engines™ new carburetor comes
adjusted to a basic setting. This setting should be
maintained during the initial break-in runs.
Before you first start the engine, make sure
that the spark plug is screwed in and tightened
and that the plug socket is fitted in place and
fastened down properly. Fix the ignition sensor
in the proper position above the magnet with the
screws enclosed.
Important:
Never turn the engine over with the
ignition turned on unless the spark plug is inserted
in the plug socket. This could lead to ignition
damage.
Carburetor Adjustments 26GT
Adjust needle (L) for low rpm range 1 turn and 50 minutes
Adjust needle (H) for high rpm 1 turn and 35 minutes
Basic setting: (minutes refer to the hands of a clock)
Carburetor Adjustments 35GT
Adjust needle (L) for low rpm range 1 turn and 45 minutes
Adjust needle (H) for high rpm 1 turn and 45 minutes
Air Pressure Inlet
Adjusting Needle L
Adjusting Needle H
Choke Lever
Pressure Inlet