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  1. #11
    PWCToday.com Is My Home Away From Home BLRider's Avatar
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    Apr 2007
    Location
    SE MI
    Age
    54
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    8,570

    Re: is there any difference between 440 pump and 550 pump

    The 550 impeller is cone shaped and fits into a cone chapped wear ring, the 440 impeller of is not.
    Never argue with an idiot, they will drag you down to their level then beat you with experience.

  2. #12
    PWCToday.com Is My Home Away From Home JSNate's Avatar
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    Apr 2010
    Location
    Michigan
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    54
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    4,019

    Re: is there any difference between 440 pump and 550 pump

    Quote Originally Posted by Rhys View Post
    JSNate, are you sure that the 550 impellers are a fraction bigger in size than the 440 impellers that don't screw on? Because I have a new 550 impeller but only 440 pumps for my mini jetboat, so I cant use it till I buy a 550 pump. I am running a 550 engine, but the 440 impeller has had its day with stones, (need to make intake better as are crap in the shallows) but a new550 pump and impeller should help, but I reakon the impellers are a touch bigger???

    I don't understand your question about the impeller size difference? However, the 440 impeller and 550 impeller are not interchangeable. You can change out an entire driveline to switch from one to another, if you like. The JS550/JS550SX and a JS440 pump are completely different in design and function.

  3. #13
    PWCToday Newbie
    Join Date
    Jan 2013
    Location
    new zealand
    Age
    31
    Posts
    32

    Re: is there any difference between 440 pump and 550 pump

    Yea I did swap out to 440 because my 550 pump bearings completely self destructed. lol Have a new 550 impeller so am redoing bearings so can swap back again, but the new 550 impeller looks bigger but I am thinking it must just be the pitch is quite different, not the actual impeller diameters, or else I would need a different wear ring... cheers

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