Tecumseh 6.75 HPengine on Craftsman 143.046702

[KKent454]

The engine was kicking back and hard to pull. Investigation showed a bent flywheel key.
I replaced the flywheel and key with the same model number items.
With the new parts in place, the engine still kicks back and refuses to start.
I have checked the blade key, to make sure the blade is correctly attached to act as the additional load on the engine. It is attached and moves with the crankshaft.
.
What else could contribute to the kickback and not starting?
It still seems like an odd timing issue, but visible parts are where they should be.

 

[Rivets]

Did you retorque the flywheel nut properly, if not you may have sheared the new flywheel key you installed.

 

[tom3]

Does this motor have the magnets inside the flywheel? Possible that one of them came loose and is out of place?

 

[Scrubcadet10]

Jacks shows the craftsman number crossing to Tecumseh LV195EA-362011B,
Shows using a solid state ignition so probably no magnets under the flywheel.

 

[KKent454]

Checked the flywheel nut and key - nut is tight, key is still intact.
This motor looks like it has the magnets mounted in the flywheel itself - in a wide part of the flywheel and spinning past the coild, mounted by the flywheel.

I did notice when checking the nut that it felt like there was a tiny bit of "slop" between the turning of the flywheel and any tension from the engine.
This is not my own mower, so I don't know how many times it might have hit things in its life. Would it be possible the "slop" means something not quite right inside the engine itself?