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  1. #1

    2002 rxdi low top speed of 48 mph

    2002 RXDI runs great and rpms top out at 6800. Ski runs great but tops out at 48 mph on gps. I installed new wear ring and new bearings and seals in jet pump last weekend. Prop not really beat up but not perfect either and is stock. Any ideas or suggestions?

  2. #2
    If it is a wear ring issue, the RPMs will usually be higher than normal WOT numbers. That engine usually runs 6950 hot numbers. That boat is a 59-60 mph unit. At 6800, you should be much better than 48. You are on the right path with ring and prop, but it doesn't make perfect sense.

  3. #3
    What impeller are you running, is it the OEM?

  4. #4
    The prop is stock as far as I know. I just bought ski with bad crank and fixed it. Click image for larger version. 

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    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  5. #5
    The pics are from before i replaced the wear ring and the plastic output blades on pump housing have 2 broken pieces about size of your index finger from first knuck to finger tip.

  6. #6

  7. #7
    I have heard talk if ceramic seal could be issue.

  8. #8
    canuck's Avatar
    Join Date
    May 2006
    The wet left coast.
    That impeller needs to be replaced or professionally repaired.

  9. #9
    SURFnTURF's Avatar
    Join Date
    May 2007
    They use a 271000920 swirl impeller OEM stock which that in the picture is not
    Your Pump is shagged, the pump Vanes(for straightening and accelerating thrust output) are damaged from rocks usually.
    You will need another pump.

  10. #10
    I pulled pump today and the impellar # is 271000931. Which from what I have found is off a high altitude late 90's gsx but I can 't find out what the pitch is. Anyone know? I have the correct impellar on order should be in Thursday.

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