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Old 07-06-2002 | 07:28 PM
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wtb3886
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Joined: Jul 2002
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From: Easley, SC
Default Carb adjustment

Turn in your high end needle all the way closed and take the fuel line off and put a new piece of tubing on this line. Blow into this fuel line and back out your low end needle just until you hear air coming from the opening of the carb. Then set your high end needle out 2 or 2 & 1/2 turns. Crank your engine with the carb barrel just slightly open. Always make sure that the radio setting for starting your engine for idle on the slide tab only allows the engine carb open just slightly.
To properly set your high end adjustment after you get the engine running, have someone hold the transmitter and you hold the plane, turn the throttle setting all the way up if it will take and with the plane on the ground. Take and pinch your fuel line and listen to the engine. If the engine starts to rev up then leave the high end setting alone. If the engine sputters then you are too lean, back the high end out a quarter turn or so. After doing this run the engine back to full throttle again and this time hold the plane up so that the nose is pointed to the air and listen to the engine.
Now we need to set the low end needle setting, make sure your throttle stick is set to idle. Take and pinch the fuel line to the carb and listen. If the engine starts to rev up then you are alright, if it stumbles then you are too lean.
Reverify high and low adjustment prior to putting her airborne.