Reply To: Fixing buggered crank threads

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July 11, 2021 at 4:58 pm #242487
opposedtwin
Participant

    US Member

    Plus one on both methods. I have a 1946 mercury kd4 thst i mushroomed. Filed off the distorted portion, re-cut threads with correct size die (7/16-20) then bought a thread file and it all worked very nicely.

    Be patient and good luck. And YES! always use a nut or the special plug mercury makes to protect those threads.