Reply To: Converting Yamaha 6hp 677 model to 8 hp

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July 7, 2021 at 10:37 am #242150
Mumbles
Participant

    If both motors use the same prop, then you have to find out what the maximum rated RPM is for each motor.

    Are there any Yamaha dealers in your area? If so, they should have the specs or be able to get them.