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

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August 15, 2020 at 9:06 am #211684
Don
Participant

    US Member

    One more thought….Did you use the correct base gasket when you replaced the powerhead? There are a couple of different base gaskets used depending on the year, the wrong gasket could create a leak or restrict water flow…
    Sure hope I am wrong about this thought….What year powerhead did you use? Just like the gaskets, the powerhead castings are different between the 55 and earlier vs 56 and later models also…Unfortunately, the hole patterns are the same, so the wrong gaskets/powerheads will bolt is place just fine….