Reply To: '65 BigTwin 40hp 1/2 spark

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May 29, 2019 at 12:40 pm #176249
Don
Participant

    US Member

    Yes, I would have another look under that flywheel just to be sure….But, please know that these old 40hps can make some strange powerhead noises, especially when warming up, so it is quite possible nothing is really wrong….I am assuming you have drained/refilled the gear lube and it was OK….