Home › Forum › Ask A Member › Johnson A-80 flywheel puller bolt size? › Re: Johnson A-80 flywheel puller bolt size?

#66346
Buccaneer
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    US Member

    Thanks for the replies. Richard, I edited my post,
    but pretty sure I meant to say the bolts are larger than 12-24,
    not 10-24, but I’ll recheck tomorrow.
    Good to know there’s a metric option available.
    I think they’d have to be 2-1/2 to 3" long to work
    with my puller.

    Update: I just check my note from the garage.
    The flywheel bolt size that held the rope pulley
    on were 15/64" according to my drill size gauge.
    15/64" = .234
    A 12-24 bolt diameter is .216 according to the Net.
    My 12-24 tap was too loose in the flywheel holes,
    which jives with the info above.
    Looks like 6mm is the same as 15/64", and if I understand
    metric thread pitch of "1", that would be about 25 tpi pitch
    instead of 24?

    Prepare to be boarded!