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Thread: jet pump q's

  1. #1

    jet pump q's

    is the pump on a 81 js550 bigger than that found on a js 440 and if it is and you put the 550 pump on the 440 would you get a power boost or would the motor just bog down i ask because me and a buddy put the guts from a 440 into his 12 foot boat, poor mans jet boat it does about 15 to 20 with two people in it i was just wanting to know the best upgrades to make it go a bit faster thanks in advance! oh and the motor is bone stock!

  2. #2
    Moderator DrewNJ's Avatar
    Join Date
    Dec 2005
    Marlton, NJ
    If I remember correctly from building those skis years ago the pump out of the 440 actually performed BETTER in the 550 skis. But it's been a LONG time since I've even thought about old kawi standup tech....

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