Took my starter off the 8n I have been working on a couple months and it looked good and worked good. The tractor has been turning over fine since I got it a couple months back. I got it running good last week and used it a couple hours. The next day the started would spin but not the engine. I rolled it off and used it an hour and turned it off and did the same thing. The flywheel looks and feels worn is it normal for it to start fine and then all at once not catch at all. What would bee the chance it stopped on a good spot for 100 plus cranks and now stopping on a bad spot. I never split a tractor and really don't have a good spot to do it but I thinks I got to many new parts installed to stop now. New alternator,gas bowl and cut off,new manifold and pipe,new spring under gear shifter,points and condensor,switch,wiring harness plugs