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The flywheel can be cracked or the teeth on the flywheel can be broken or worn. Either of these conditions require the flywheel be replaced. I would also replace the starter when replacing the flywheel. This will prevent damage to the new flywheel from the worn teeth on the old starter.
the bendix gear on the starter is stuck on the flywheel remove starter check bendix gear for wear if worn to bad replace starter
yes. a starter made for the 168 tooth flywheel would not engage a 153 tooth flywheel.
The part of the starter called the starter drive is shot and hopefully the flywheel ring gear is not damaged also. I would recomend removing the starter and inspecting the flywheel ring gear and if it looks okay replace the starter with a rebuilt or new one.
2 things that come to mind: # The teeth on the gear are worn down - that would prevent them from engaging with the teeth on the flywheel and turning the engine over # The starter gear is not being pushed out far enough to completely engage the flywheel Either way, it's likely the starter is coming out for repair or replacement
I would suspect you it was installed incorrectly, it is a bad starter, or the flywheel is broken or has a missing tooth.
the teeth on the flywheel will be missing or damaged when you rotate it around.
The starter is probably not aligned with the flywheel. The clearance between the starter and the ring gear needs to be checked.
Defective starter drive? Broken tooth on flywheel/converter? My guess would be either the flywheel, or if the starter has been changed recently, maybe there was a starter shim that was not put back in.
if it is in fact the starter, it is probably engaging the flywheel. starter may be faulty.
Starter spins but doesn't turn engine? Probably the starter drive. The starter drive is part of the starter and can be replaced if the rest of the starter is still healthy. If your not to handy with wrenches you may want to replace the whole starter with a rebuilt one. Worst case, the flywheel ring gear is bad in which case the transmission would have to come out for replacement of ring gear.
You should be able to use the same starter and wiring from the original engine if the flywheel has the same diameter. Changing to a different diameter flywheel would require you to change the nosepiece on the starter.