Reply To: Shaking at High RPM Running 1955 Evinrude Fleetwin Aquasonic 7.5HP

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September 19, 2019 at 9:11 pm #183657
eviltwin
Participant

    At full throttle that must have put huge amounts of torque all through it in a nano-second.
    The question is where did it get absorbed, and how far up the motor.
    I’d even think about looking at the flywheel shear key, not neccessarily pull the flywheel but check for looseness & look at the keyway.
    How is the prop shear pin?
    You said it starts to buck at full throttle, is that with it IN gear or NEUTRAL?
    Sorry for your bad luck, hope you get it solved.