Starter motor

[Welder]

Does anyone know if the old type pre engaged starter motor can be directly replaced with the more modern type with the solenoid on it ?

[molly the mini]

Did this not so longoing ago and the teath on the fly wheel were different

[mgb1978]

Also different number of teeth on the two starters.
It will fit in fine but will bind on the flywheel when you turn over the engine.

[Welder]

There are 8 teeth on each starter and when turned over the engine does turn over but sounds rough

[mgb1978]

I have 2 here....pretty sure one has an extra tooth, can't remember which one.
Either way the flywheels have a different number of teeth.

[woody]

The pre engaged will fit the old flywheel but like you said it makes a lot of noise and will do damage.
The inertia starter will lock the engine if fitted to a later flywheel.
Some early verto flywheels (early metro) have the ring gear for the inertia type starter.