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    John Deere D120 21hp Briggs OHV very hard cranking, breaking metal pinion starter gears.

    https://www.briggsandstratton.com/na/en_us/support/faqs/browse/valve-repair-maintenance.html I'm at work so I don't have the actual B&S technicians manual, but the procedure is the same. If you google for the B&S tech manual a pdf should pop up. The method they teach their service techs, to the...
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    John Deere D120 21hp Briggs OHV very hard cranking, breaking metal pinion starter gears.

    That's kind of my dilemma. Everyone saying the design is the flaw regardless, and you get lucky or unlucky, so its a hard to pill to swallow for the OEM cam being $110+ shipping and 2-4 week delivery versus $35 and two day delivery if its going to be a crap shoot anyway. If it's a thou or two...
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    John Deere D120 21hp Briggs OHV very hard cranking, breaking metal pinion starter gears.

    As a tool and die maker I could machine something to mount to the flywheel stud without tightening the existing bolt, and could create a simple clutch / safer mechanism to separate the drill from the flywheel once fired up, but I try not to spend all my free time machining if I can help it. Ive...
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    John Deere D120 21hp Briggs OHV very hard cranking, breaking metal pinion starter gears.

    Quick thought, probably dumb: The nut on the top of the flywheel assembly is a 15/16. Any reason I can't just put an impact driver on it and spin it to fire up? Is it a reverse thread that'll spin off if I try to send it clockwise or anything? I assume the magneto is what provides and times...
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    John Deere D120 21hp Briggs OHV very hard cranking, breaking metal pinion starter gears.

    I will check this when I get home. Just from memory though and based on how it's behaving I sounds like the ACR is not functioning. Is there a work around to modifying the existing camshaft itself or some other modification to the engine to achieve a similar function? When I can get the thing...
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    John Deere D120 21hp Briggs OHV very hard cranking, breaking metal pinion starter gears.

    What is the ACR? The camshaft decompress feature? How do I test it?
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    John Deere D120 21hp Briggs OHV very hard cranking, breaking metal pinion starter gears.

    Hey everyone, like many of you I figured I could restore a clapped out John Deere I got for a song and a dance and it keeps finding new and exciting ways to not run when I need it to. So, I bought it from the original owner with 400 hours on it, says the starter was stuck up and he was done...
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