Re: Johnson Flywheel with a stripped puller hole

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July 2, 2018 at 10:17 pm #78914
jerry-ahrens
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    Yes, you can install a 1/4 helicoil insert to fix that. If done correctly it will be stronger than original. Drill carefully… If you go with 5/16 you will need to drill out the recoil plate that bolts to the top of the flywheel. Since it’s made for 1/4 inch bolts, the 5/16 won’t fit. The problem is that part is super hard, and a regular drill bit won’t touch it. I have one on a Big twin that I need to drill out myself.