OLLIE 26 Report post Posted July 1, 2007 so i need to replace my starter motor on my M20 and the replacement unit i got is the small unit and the one i'm replacing is the big unit. the problem is that they have a different pinion size so i am swapping the pinions over, all was going fine until i got both pinion assemblies out only to realize that they are slightly different (the assemblies) and swapping them over probably won't work, unless there is a way of removing just the pinions.... has anyone done this before ... can offer me some advice ? Quote Share this post Link to post Share on other sites
hotwire 352 Report post Posted July 1, 2007 so i need to replace my starter motor on my M20 and the replacement unit i got is the small unit and the one i'm replacing is the big unit. the problem is that they have a different pinion size so i am swapping the pinions over, all was going fine until i got both pinion assemblies out only to realize that they are slightly different (the assemblies) and swapping them over probably won't work, unless there is a way of removing just the pinions.... has anyone done this before ... can offer me some advice ? Ollie Early (big) & later (small) m20 starters both interchange freely without any mods at all. The set-up is the same for both. I have done this before both ways. Cant say I can remember pinion size relationship between them but they are totally different style starters (later is planitary gear redution type) which if pinion is different size - this will be compensated by its offset in relation to the front bracket mounting. As long as both are for an M20 then is a straight forward swap, the later doesnt use the third mounting into the side of the block though. Finally no - pinions cant be interchanged Cheers Grant Quote Share this post Link to post Share on other sites
OLLIE 26 Report post Posted July 1, 2007 Awesome! cheers grant, at least now I know what the inside of a starter motor looks like Quote Share this post Link to post Share on other sites
