Replacement engine for Stihl MS180

[heimannm]

It looks to me like that key has been sheared off, and the tapered bore of the flywheel looks as though the saw was running with the flywheel loose and the taper bore has had some damage done to it.

Do your best to thoroughly clean up that bore and make sure the stub of the key is aligned with the keyway on the crankshaft when you reassemble the saw. Also be sure to torque the flywheel nut properly. You should have been able to get the workshop manual from the links in earlier posts.

Mark

 

[Koper]

It looks to me like that key has been sheared off, and the tapered bore of the flywheel looks as though the saw was running with the flywheel loose and the taper bore has had some damage done to it.

Do your best to thoroughly clean up that bore and make sure the stub of the key is aligned with the keyway on the crankshaft when you reassemble the saw. Also be sure to torque the flywheel nut properly. You should have been able to get the workshop manual from the links in earlier posts.

Mark

I'll try to do that, I'm also considering and I would like your opinion about it - to cut a key way in the flywheel and to use a woodruff key, if I measured right, it should be 3x8mm, at least that what I measured on the shaft's key way. as per the workshop manual, unfortunately I didn't found it, even though I've got a message to check my inbox. I'm ashamed to admit that I couldn't find my inbox. if you or any other member is willing to Email it to me, I'll highly appreciate it.

 

[heimannm]

Certainly it is possible to cut a keyway in the flywheel and use a more conventional key in the crankshaft. I have not found it necessary so far to do that as I have been able to rely on the taper to fix the flywheel in position.

Mark