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9 or 10 tooth starter drive?


New Englander

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When I cross the starter drive P/N it comes up with 10 teeth. When I cross the starter P/N it comes up with a 9 tooth unit. It has a 9 tooth now but it's been clashing. I turned the ring gear around and of course will try it with the 10 once the engine's back in. 3616 with a C221, becoming a C301.

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File one off 0_o.... Ha ha sorry bad joke...

I kinda got to keep an eye on the same thing with the old road grader w/ TD9. IH has two different size starter drive teeth and the Adams Road Grader has a little larger ring gear.

Ye old ring gear has two flat spots so I have to pull out the hand crank and turn the engine over to a good place on the ring gear and the starter locks in and it starts right up.

Good luck

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Doesn't work. The slightly larger diameter of the 10 makes it bind on the ring.

Funny thing is that advertisers show both 9 and 10 tooth starters though the majority show 9.

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The starter drive gear may be 9 or 10 but the nose cone is different also so you need the proper starter to match the drive. Take for instance a 706 Farmall tractor. You can have either the 9 or 10 drive but it has to match the rest of the starter due to the nose cone. Have seen that happen a few times with rebuilt units. On the farmall 656 they changed the number of teeth on ring gear and then match the starter drive to that. Confusing I know.

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