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  1. #1

    Default How can u tell if your prop is to big???

    Not sure but I think my prop may be to big. Don't seem to get on plane fast enough. I have a 17 ft tunnelhull with a 90 hp yamaha pushing it.

  2. #2
    Join Date
    Sep 2010
    Location
    ontario
    Posts
    9,880

    Default Re: How can u tell if your prop is to big???

    Did it run OK before ???---------------New to you motor and boat??---------------Nothing wrong ( water logged ) with the boat ???-----------------Do you have a tachometer ???----------------Is the motor guaranteed to be in good condition ??? -----------What pitch is the prop now ???

  3. #3

    Default Re: How can u tell if your prop is to big???

    Boat is new to me but prop was wore and had been reconditioned twice so I took prop off of my skiff. Boat is in good condition so I don't think it is waterlogged. Pobably should install tach. Not sure on pitch I will post this afternoon.

  4. #4

    Default Re: How can u tell if your prop is to big???

    Would a four blade prop give me a better hole shot??

  5. #5
    Join Date
    Oct 2011
    Location
    maplevalley WA
    Posts
    8,361

    Default Re: How can u tell if your prop is to big???

    Trial and error. There are alot of factors boat weight and hull condition. Engine tune up and type of fuel/oil. 17` with a 90hp should get up pretty quick. If everything is prime and your still not turning max rpm then try a smaller prop or less pitch. Size it wih engine rpm on the upper end of the power band of the engine. A good clean balanced prop is critical.

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