My starter drive gear thrust forward and engages the flywheel but
fails to
turn over the engine. Any of you more mechanically inclined guys have a
guess as to what my problem may be? (It's a rebuilt starter)

Jay


Can you turn the engine over by hands on the ring gear?
One rotor could be one tooth off on the phasing gear.
Make sure the right spark plugs are in there.

Put a  voltmeter on the brush connections.
If the starter wire is too small too much voltage
will drop across the wire.

Send a sketch of the wire sizes and a schematic on how
it is wired.

Paul Lamar

Hi  Jay, Make sure that the starter Bendix drive is correct and not
running out of travel before the solenoid contacts meet. (remove
starter, clamp starter and put a piece of pine packing crate onto gear
and engage starter should smoke the wood on the gear), no matter how
hard you try to stop it, ie you will not stop the gear, all the above
assumes that the engine will turn over.
John Burey