Starting Problems

[Ronart boy]

Hello everyone

I am driving a Teal type 35, which has a problem.

When the ignition key is turned the starter motor whirrs but doesnt engage. turn the key agan and the same thing happens, the next time the starter may engange and the engine fires up. This does not happen all the time and sometimes after being run it will fire up straight away. the engine is a 1800cc type B from a 1974 Morris Marina

Despite having a new starter motor and a new flywheel ring gear the problem still occurs. I was wondering if the ring gear and the starter motor (pre-engaged type) are not compatiable, so i counted the teeth on both. The starter motor has 9 and the ring gear has 110. I understand that there were two type of ring gear for the marina engine one for the inertia starter motor and a different one for the pre engaged, by the way the teeth on both don't seem damaged.

Does anyone know how many teeth should be on the ring gear for the pre engaged starter motor,

or

Have any idea what the fix needs to be to get the starter motor engaging every turn of the key.

Thanking you all
Howard

Edited by Ronart boy on Wednesday 25th May 10:32

[Flying Phil]

Puzzling! I thought that, with a pre engaged starter, the pinion gear was moved to engage with the ring gear by the solenoid, and that movement switched the current to the starter motor itself. So the ring gear/flywheel always moved once the pinion engaged. (Mind you I did have a lot of trouble with starter motor engagement on a 3.4 Jaguar in a Ronart that I built).

[Ronart boy]

Thanks Phil, yes it is puzzling, I thought that the gear had to be fully out before it started spinning I think I will try and get a video posted so that it can be heard. I haven't bench tested the starter yet, assuming that it was tested before it left the manufactures

I followed your posts on the Ronart build it was very interesting as I have a mk1 Ronart that I am supposed to be building but things like this keep distracting me