Bristol 400 Starter Motor

[mlh420]

Good afternoon,

Please excuse me for jumping on this thread. I have recently replaced a faulty Powerlite starter motor with a replacement from Powerlite. However, every now and then, I press the button and hear a horrible grating noise - which I assume is the teeth not being correctly lined up with the ring wheel. Press it again and it's fine.

I am wondering if the new starter motor cog is correctly matched to the ring gear. I have been trying to find out the number of teeth on the 400 ring gear, but cannot seem to find the info. Would anyone have this info please?

Thanks,

Mark

[Geoff Dowdle]

Mark mhl420 ,

All 6 cylinder ring gears have 108 teeth
The starter pinion has 9 teeth and it's diameter is approx 29mm

Your starter motor is possibly jamming because the ring gear is worn.

I have seen a few Lucas starters with broken nose cones due to the pinion jamming on the flywheel ring gear , especially the alloy nose cones of the later models.

Best to inspect the ring gear and if it's badly worn replace it .

GeoffD

[mlh420]

Hi Geoff,

Thanks very much for the info - most helpful. I understand your point about the ring gear, but the grating has only started since the new starter was fitted. The old one was fine - until the motor packed up!

I will have a look and try to find out the problem.

Mark