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  1. #1

    Default Prop, too much RPM

    Hi, I have a 2005 115, 2 stroke saltwater edition. (J115PLSOR)
    it has a Viper prop that I assume is original. 13 7/8" X 19, 13 spline. That prop will easily rev my engine into the 6500 plus range. I am always having to adjust to keep it at 5500 or below, depending on throttle and trim. Will moving to a 21 pitch be enough to drop that down, or should I go to 24 pitch.
    Thanks!

  2. #2
    Join Date
    Sep 2010
    Location
    ontario
    Posts
    13,660

    Default Re: Prop, too much RPM

    Try the 24 pitch.

  3. #3
    Join Date
    Dec 2015
    Location
    maplevalley WA
    Posts
    3,470

    Default Re: Prop, too much RPM

    General rule of thumb is 200 rpm per inch of pitch.
    It takes a nickle to go first class!
    If it aint broke dont fix it!!

  4. #4
    Join Date
    Nov 2011
    Location
    tennessee
    Posts
    2,581

    Default Re: Prop, too much RPM

    What type of boat????
    Pappys Sales and Service
    Owner and Factory Certified Technician
    Former racer KDBA (Kentucky Drag Boat Association)

  5. #5

    Default Re: Prop, too much RPM

    Hello I havev4her7v77c

  6. #6
    Join Date
    Apr 2016
    Location
    barnegat NJ
    Posts
    2,707

    Default Re: Prop, too much RPM

    TRy that again please?

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