I inherited a Troybuilt 3250.

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Engine is AFU.... exhaust valve broke, piston is trash and the cylinder wall is scored pretty good.
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Damn tapered shaft ...
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Went & got a predator... shaft is a wee bit shorter and no taper of course.
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didn't want to tear it apart to chuck the shaft up in the lath to cut the taper so I took the recoil off, pulled the plug and spun the engine with a socket & a drill and cut the taper with a grinder.. close enough.... Bolts too short because the shaft is shorter. Damn thing was only engaged by about 5 threads from what I can tell.... any way ordered a 1" longer grade 8
bolt from McMaster-Car.. 5/16-24x8". shipping was more than the bolt.... broke the damn brush/rectifier in the process too. found that on Amazon and after my rewards points got it for $3.50. hope it works after all this..

I know a lot about a lot of things BUT I still have a lot to learn.
Life is what you make of it. So, why not make a working machine to make it easier.