Bobs
07-04-2006, 01:23 PM
How much play should there be in the crankshaft when pulling it back and forth? The motor was new last November and probably only has a couple gallons of fuel through it. The shaft moves back and forth more than a milimeter and actually makes noise when moving it in and out. It is impossible to get the motor tuned - RPMs will suddenly increase on their own while in stunt mode to 2000-2100 and it's set up to hover at 1800. Had a Hyper 50 recently that did the same thing. I sent it in to Hobby Services and they replaced the rear bearing and put a new carburetor on it. That motor was also new this past winter.