[klharper124]

Im just learning that they are available new : BOSCH STARTER MOTOR, 8 TEETH

Careful using that starter. It is a 3 bolt high torque starter and from talking to Alfaholics and Alfa stop it will break the bell housing on the 2 bolt 750/101 cars.
Both Myalfagroup and Classicalfaparts in Netherlands offer a exchange rebuild service for the the correct Bosch starters. These things are hard to get and I went through a tough time to procure one a few years back, so good luck.

 

[Chas H]

Torque to start the engine is determined by the engine, not the starter. And there is the rather thick steel plate between engine and bell housing, so something else was going on if the bell housing broke.

 

[waller]

If the magnet inside the solenoid is intact, it should work. Report back to HQ. BTW, the adjustment on the throw of the plunger is preset. no need to touch it... .

Ok, for anyone combing the archives for the solution, I think I have it.

That adjuster you mentioned, while it may adjust the throw, also adjusts the timing of the engagement of current-to-the-starter-switch to the engagement of the pinion. As the contacts in the solenoid wear (or erode) away from use, the internal mechanism that closes the circuit to the starter motor can cease making contact.

In my case, a slight adjustment of the fulcrum allowed the internal contacts work every time.

I'm going to take it to the local starter/alternator repair shop to confirm.

 

[waller]

I'm going to take it to the local starter/alternator repair shop to confirm.

When adjusted per the manual I referenced in another post, the solenoid and starter work fine. When significanlty out of adjustment, the solenoid advances the pinion, but doesn't pass high apmperage current on to the starter motor. I did not try to figure out why, its working great, and its 65 degrees out, the top is down and I am going for a celebratory drive.

 

[waller]

this document describes the proper way to adjust the eccentric fulcrum for several lucas starters:

https://www.lrsoc.com/forum/forum_files/Lucas Manual C.pdf