Originally Posted by
Cruiser133
I feel your pain brother. I ran in to some similar issues on my M51. I ended up using some rubber spacers between the unit and the mounting posts to lower the rotation unit. I then mounted the turret rotation ring lower as well by making a sheet metal mount. It works, but it sounds like the motor is chewing marbles when it turns right. Left, no problem and quiet. I think the rotation unit is bad, at least one of the gears, the motor is fine...
I just saw a thread for a fix for rotation units that make noise one way but not the other. The guy said all he did was slide the worm gear on the motor shaft out a bit so the worm fully engaged the teeth all the way across the worm. So far everyone that's tried it has had success and they sing the praises of this quick, free fix. I'm going to try it in a couple of mine as well when I get the time.