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Thread: need prop help

  1. #1
    offshoreed
    I have just had a new motor built for my american offshore, its dyno'ed at 725hp. what pitch should i start with. you guys seem to know the ticket.
    please help.

  2. #2
    BADBLOWN572
    What gear ratio in the drive?

  3. #3
    offshoreed
    not sure what the ratio is. this boat had a big motor in it years ago. if i was a betting man 1.5 to 1. yes i know i will need to change drive in the future but would run this one a little while.

  4. #4
    BADBLOWN572
    not sure what the ratio is. this boat had a big motor in it years ago. if i was a betting man 1.5 to 1. yes i know i will need to change drive in the future but would run this one a little while.
    I would say probably a 34 would be a good place to start. After that, you will have to change your gear ratio.

  5. #5
    offshoreed
    Thanks BadBlown572 I will give it a try. I hope for now that it will work. Have you heard of anyone using those hydomotive 5 blades on a cat boats.

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