by andernamen » Wed Mar 08, 2006 12:39 pm
Engine is running very erratically, tends to bog down (sometimes) when throttling up. Needle valve setting doesn't seem to affect problem. If staying at idle for a while, problem of bogging down at throttle up is worse. Tried to make another pass while landing my plane, so I gave it throttle. Bogging occurred and I had no power, so I crashed. Not too bad, but this problem is keeping me on the ground and I really want to get it solved. My carb doesn't have the small screw in the front as the diagrams show, does this affect it? Also, the new mixture disc for the remote needle valve has two holes instead of one. Not sure if any of this matters, but just want to make sure this won't affect anything. Could it be air leaking from needle valve? Thanks, Jim