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Thread: Prop Question

  1. #1

    Default Prop Question

    Ive been seeing different ranges on these and it confusing,, I have a 2002 M115A2 on a 22ft pontoon whats the currect prop size or something that will get me close..

  2. #2
    Join Date
    Mar 2010
    Location
    Hamburg, NY, USA
    Posts
    2,851

    Default Re: Prop Question

    You must use trial and error. You need a tachometer. More oitch slows the motor. Start around 12 pitch. You may have to down to 10 to get proper WOT RPM.
    Paul
    Certified Tohatsu TLDI Technician
    Hamburg, NY USA

  3. #3

    Default Re: Prop Question

    So have a 13.75x15 prop getting 4600 rpms which which direction do I need to go to get 5200-5700 rpms also thinking of going from a 3 blade to a 4

  4. #4
    Join Date
    Mar 2010
    Location
    Hamburg, NY, USA
    Posts
    2,851

    Default Re: Prop Question

    Less pitch is more RPM. Maybe 300 or 400 RPM per inch. Diameter is irrelevant. Changing to 4 blades means going even less pitch.
    Paul
    Certified Tohatsu TLDI Technician
    Hamburg, NY USA

  5. #5

    Default Re: Prop Question

    So got a 14x11 at 5700rpm’s getting 23 mph seeing people getting more I’m confused

  6. #6
    Join Date
    Mar 2010
    Location
    Hamburg, NY, USA
    Posts
    2,851

    Default Re: Prop Question

    Apparently 11 pitch is working for you. More pitch is less RPM.
    Paul
    Certified Tohatsu TLDI Technician
    Hamburg, NY USA

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