Re: Johnson Flywheel with a stripped puller hole

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frankr

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#79058
quote Mumbles:

This Big Twin might have had its flywheel grabbed on the outside instead of using the devoted holes for pulling. Has anyone ever tightened a puller so much it pulled the flywheel right off the hub? Doing this would ruin your day and open a big can of worms! 😥

OMC made a change in their Big Twin flywheels around 1958-ish. The revised hub has a flange that the puller screws into. The one in the picture is the old style where the flywheel could be pulled off of the hub. Worse, they often broke loose.