Stator coil on a 25hp evinrude

[Basseyes]

Bought a project boat and motor this past winter. The Motor is a 1978 evinrude 25hp. Kid said the stator was bad and the shop wanted $400 to fix it. Took it apart and stator was cracked a bit but nothing with to much wear. Found a used strator off of hsolist for $50 that matched it what seemed to be perfectly. Was a bit jittery about spending the money on a used one but it looked good plus a new one runs close to $300. Put it in and started right up. Just had the boat in the water for the first time and the motor started right up. Runs great. Up and down the lake we go. Ran it for about 45 minutes. Was letting my oldest kid drive and started to seem slugish. Told him to go full throttle. Said he was? Then saw smoke. Told him to shut it down. Pulled the hood off and smoke was coming from under the fly wheel. Took it home and pulled the fly wheel and the stator is cooked and worn? Impeller was pumping water and everything else on the motor was warm but not hot.

Anybody have any experience with stators?

[boatfixer]

Electric start model?

[Basseyes]

Electric start model?

Yes.

Can't figure out why it would have worn down. Have checked for slop in the plate and shaft. There is more than enough clearance between the flywheel and strator. Am wondering if the stator got hot and expanded enough to make contact with the flywheel? Or if there is something off just enough on the shaft or plate to have caused it to rub on the flywheel and then heat up?

[boatfixer]

Are the windings and pocking burned? Sounds like it may have shorted. But the question would be, could the rectifier cause it? Since the guy told you the stator was bad to begin with, and you smoked another one, the rectifier could be causing the problems.

[Basseyes]

Not sure what the rectifier is but am wondering the same thing if there is a problem causing the strator to go? Do not want to put $300 into a new strator and have it do the same thing.

The stator that was in it when I got it wasn't burned at all but the black casing was cracked in several spots. Wouldn't spark. Put the used one I bought off hsolist in and had great spark. After running it and burning it up took the flywheel off and it looks like it got shaved by the flywheel because there's a dust like particle from the strator all under the flywheel. Checked both the flywheel and the strator with a micrometer and there doesn't seem to be any wear spots on either? The wires in the strator and going to it are all fine but there is a burnt electrical smell to it?

[Basseyes]

Just did a bit of reading and from what I understand the rectifier can cause the stator to go bad. Man that stinks. A $30 part that can make a $300 part go bad. Sounds like it's a good idea to replace the rectifier when replacing a stator even if the rectifier is good. Seems like part throwing but what do you do risk a $300 part for the sake of a $30 part.