Starter motor question

[Cuppa]

You'll find motor stops in same spot everytime, With a large screw driver or Socket rotate motor
1/4 of a turn and try, ring gear will be new in this area. Might sound dumb but its true, EF falcon
were famous for it

So are you saying that with the starter motor removed, that rotating the motor 90 degrees that the motor will always then stop in this 'new' position? If so that sounds a better option than having to drop the motor to get a new ring gear fitted. Please confirm.

Follow on question: if I were doing this on a petrol motor I would remove the spark plugs to reduce compression & make turning the motor easier. On a diesel would I remove the glow plugs to achieve the same thing?

Cuppa