Morris Minor Owners Club

I've previously had a fantastic starter in the 1098 but it died. The new one (as in exchange B90 factory job) is nowhere near as fast. Is there any 'magic' involved in getting them to work or is there a secret method to ensure speed, other than good cleaning of the comm and the gaps between? Could it be down to meshing of the teeth? Good wiring from battery to terminal.

They've always seemed to vary. On the other hand, 12v though a 6v Austin Seven starter certainly peps it up a bit.

Rob
All you have suggested help the starter efficiency.

Even better with 24 volt.

Phil

I have come across two different numbers of teeth on the pinion, and although both engage OK with the flywheel, the chnage in gearing does produce a different rate of turn in the engine. I can't recall the teeth count that works best, but perhaps someone else will have it to hand...

simmitc wrote: ↑Thu Apr 09, 2020 10:50 am I have come across two different numbers of teeth on the pinion, and although both engage OK with the flywheel, the chnage in gearing does produce a different rate of turn in the engine. I can't recall the teeth count that works best, but perhaps someone else will have it to hand...

Assuming the motor is powerful enough, the type of pinion with more teeth will turn the engine over faster than the type with fewer teeth ;-)

simmitc wrote: ↑Thu Apr 09, 2020 10:50 am I have come across two different numbers of teeth on the pinion, and although both engage OK with the flywheel, the chnage in gearing does produce a different rate of turn in the engine. I can't recall the teeth count that works best, but perhaps someone else will have it to hand...

The Lucas starters came in many different Part Numbers for the same 'Model Number'. So an MG35G could be the Model Number, but the Pt No difference could indicate 9 or 10 teeth to the Pinion, amongst other differences.

Just look at the vast array of Pt Nos available for a M35G, and this chart doesn't even mention the teeth variations!
http://www.classicvehicledata.com/wp-co ... motors.pdf

Yes, they can have either 9 or 10 teeth, and both mesh with the flywheel, which seems odd.

I had an exchange 10T starter some years ago, and it turned the engine over noticeably quicker than the previous 9T. I think to get the full benefit, you do need a good size battery as well.

IslipMinor wrote: ↑Thu Apr 09, 2020 12:11 pm Yes, they can have either 9 or 10 teeth, and both mesh with the flywheel, which seems odd.

I had an exchange 10T starter some years ago, and it turned the engine over noticeably quicker than the previous 9T. I think to get the full benefit, you do need a good size battery as well.

I think it's because the Starters aren't pre-engaged; so the teeth are a fairly loose mesh together when the Bendix gear throws towards the flywheel. The 9 tooth probably engages a little easier, but the 10 will give a faster turnover.