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 10:30

[gtmdriver]

There seems to be some sort of mismatch there as the starter motor shouldn't spin over until it's fully engaged.

The solenoid, which also pushes the pinion into mesh, shouldn't be able to make electrical contact until the pinion moves over its full travel.

[mikeveal]

Agree.
Try firing up the starter whilst not on the engine and see what happens. You'll need to add a ~300A connection from starter body to engine. Seeing what the starter pinion is actually doing will help you diagnose.

Hmmn. Is the solenoid integral to the starter, or is it bolted on the side of the starter? Or more precisely, did you change the solenoid at the same time as the starter?

[LLantrisant]

pre-engaged flywheel has the chamfer on the ringgear teeth towards the starter
inertia flywheel has the chamfer on the ringear teeth towards the gearbox