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  • prop pitch

    90 h.p yamaha 1985 what would be the correct pitch for a new prop.21ft boat.thanks

  • #2
    I have a 1999 C90 and I am using a 13X19 for my 17.5 foot Scout based on the recommendations from the factory. I think it may be over pitched but it brought the RPMs down from 4500 to 4000 at 32 mph.

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