starter teeth

[les]

Hi, what's known about starter motor teeth? I have a couple of motors but the teeth are a different form on each. One has a flat on the peaks the other more pointed, I don't think this is due to wear.

[mike.perry]

Do they both have the same number of teeth?

[aupickup]

i think it was 9 and 11 teeth but not sure

[mike.perry]

Is there a date stamped on the starter bodies and are they both 12 volt?
Some Morris side valve engines have 80T ring gear such as the WD generator engine and presumably Morris 8 engines (6V?). The Series MM has 102T ring gear. The starter bolt spacing is 5 in on all the starters?
t

[les]

Mike, thanks for replies. Both motors are dated 73, both are 12v and 5'' centres. One has 10 teeth the other 9.

[bmcecosse]

There are 9, 10 and 11 tooth versions. The 9 is probably the most desirable for a large capacity engine.

[HOBBS126]

good day , you can use the 9 or 10 tooth stater on your car ,both will work fine

[mike.perry]

The teeth pitch must be the same. You cannot use a standard starter on an MM flywheel with 80T ring gear, only 102T.