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Found out something new by accident going through old “ask a member”. The arms of the cheap Chinese piece of crap coils are not macined well at all. If you put them in a coil setting ring, you can see daylight between the center laminations and the ring. I measured about a dozen coils and found seven of them off by as much as 0.01. I ground the arms with my bench grinder to get them to fit properly. Also lapped the flywheel to the crank to reduce any chance of wobble. Put my “turtle” in the tank and it now runs. Need to wait until spring to see how it goes on the lake. Hope I am not too political when I say it tells you something about the values of a culture that will let such junk out the door. I keep looking for western made anything.