SBT Jetski Engines, Parts & Accessories

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  1. #1
    Joined
    Aug 2017
    From
    Idaho
    Posts
    1

    Default 1996 770 in front of a 1995 640 jet pump?

    Reason for doing this, the 640 may have burnt up a piston.

    I have a 10' mini aluminum jet boat with a twin carb 640 and a 1995 jet pump. I just bought a 1996 ts 770 for $300 with a bad motor but came with a good ebay motor.

    Will the 770 be too much power for the 640 pump?

    What issues could i have?

    Here is some pics of the boat.

    River Jet Boating Forum • View topic - 10' mini jet (with pics)

  2. #2
    Joined
    Jun 2016
    From
    Clearwater, Florida
    Posts
    279

    Default Re: 1996 770 in front of a 1995 640 jet pump?

    I have never done this before, but I do not think there will be any issues because of the horsepower difference.
    640 = 65HP and 770 = 80HP

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