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Old 01-10-2005 | 11:22 AM
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From: Elizabethtown, PA
Default RE: What should I do

Some Evolution engines are not set as advertised. I have seen a few that have had the high speed needle valve set incorrectly and the limiters only allow about 1/2 turn either way.

To verify this. loosen the allen set screw on the blue collar (limiter) and turn the high speed needle all the way in (clockwise) but do not force it down tight. Now turn it counter-clockwise about 1 1/2 turns. If you want then retighten the allen set screw on the blue collar. You can leave it loose.

Do the same thing for the low speed needle valve. (It inside the blue collar on the carb) Loosen the allen set screw for the low speed needle valve and turn it clockwise until it seats. Now turn it counter clockwise 1 1/2 turns.

In my experience, the low speed needle is set too lean from the factory and the limiter on it only gives you 1/4 turn.

I know you are new and welcome to the hobby. Can you tell me approxiamtely where you have the throttle stick on the radio when it dies. What I mean is: is the stick around halfway up or all the way up or less than halfway.

For future reference, on most glow fuel engines, the low speed needle valve is in effect until approx. half throttle and the high speed needle valve comes into effect from half throttle up to full throttle. This will help with knowing what needle valve is causing you the problem.

Also, there is a small clear fuel line that goes from the high speed needle valve to the carb. Look for bubbles in that line. There is also a line (could be any color) coming from the tank to the high speed needle valve, look for bubble there.

Let us know what you find and just describe it as best you can.