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Gentlemen,The starter on my 12 years old, 254 jimna tractor has had engagement problems from the very time it was new.I suffered through them until it failed to start and left me stranded in a blizzard while clearing snow in 2008.In the freezing cold I had to pull the starter to try and correct the suspected problem.
Just recently the problem has worn back into existence.The starter pinion is wearing away(and also the flywheel gears)and cannot reach each other for engagement.So what I did in 2008 and just recently was pull the starter.Disassemble it to remove the pinion assembly.I then mounted the pinion into my compound vise in my drill press.I plumbed it by eye.Then I chucked a grinding stone shaped to the approximate diameter as the face of the pinion (but larger in circumference than the pinion stop/locking ring)and ground that face 1/8″ deeper.This allows the pinion to travel 1/8″ further against the pinion stop/locking ring and hence also towards the flywheel for more chance of engagement.Remounted the starter and it works.Whoopie !!My hour meter reads 968 and in 2008 it was about 300 Hours.Don L. -
Interesting. I have had the grinding issue as well but just replaced the starter with a new one last week (reduction type). I noticed the shaft the starter pinion moves on also moves about a quarter inch which could be the culprit. Seems to be quite sloppy in there so I am thinking a spacer or washer has come apart and is causing the play in the shaft. My original starter lasted 900 hours, replacement about 150 before the grinding started, so some day I will open it up to see if I can rescue it for a spare.
Paul
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So far my pinion modification is still working…… but if the disengagement happens again I will chuck the snout of the starter housing in my Bridgeport and mill 1/16″ off the mounting face to bring it closer to the flywheel.For easier mounting I am thinking I could drop the starter snout into a square mold and pour concrete around it.That square block of concrete holding the starter snout would be much easier to mount in my milling vise.
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