Reply To: 6039 Speeditwin Flywheel torque

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January 1, 2020 at 8:50 am #190384
jacksonm29
Participant

    US Member

    I believe that the Speeditwin owners manual says “hammer on wrench”
    I take that as pretty darn tight.
    Leads me to believe that OMC wasn’t concerned with an accurate torque, as long as it was tight.

    I believe that the threads are 5/8-18. They would probably be good for 100 ft lbs plus, as threads go.

    I personally use a modified strap wrench on the flywheel to hold it still and a 3/4 wrench in the other hand, and pull it tight and then some.

    A loose flywheel on an opposed twin will scrap your motor quickly.

    Mark