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Thread: Need Speed

  1. #1

    Need Speed

    Ok guys, today 66 air, 52 water temps. Little to no wind. I was consistantly hitting only 71mph. Checked pump and everything else but I don't know why its running slow. Could fuel stabalizer cause it to run a little slower? I did throw some in there a couple days ago.

    Another thing that I noticed at the through hull exhaust it looked liked a red area. It was too hot for me to poke my fingers at and I will look at it closely later. But is it the coupler that may be coming loose at the exhaust exit would it appear to be reddish kinda like looking through the rubber connectors?

    What are the key signs to look for if the clutch is slipping or messing up? Is there a sure way to tell other than taking it apart?


  2. #2
    Site Admin Green Hulk's Avatar
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    how many RPM's are you turning at WOT?

  3. #3
    8000 rpms slightly jumping to 8050 and 8100.

  4. #4
    Fast-XPL's Avatar
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    What model, what mods?

    66 Air 52 water, Heat wave

  5. #5
    It was about 50 something degrees here but it rained today and warmed up a little. I had to run for awhile.

  6. #6
    Site Admin Green Hulk's Avatar
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    If you are pulling those RPM's i seriously doubt your supercharger clutch is slipping.

    It can be checked by pulling off the valve cover and installing the camshaft locking tool while the #3 cylinder is at TDC. Then pull off the intake from the SC and use a torque wrench to check the slip moment.
    It should slip at no less than 7 ft. lbs.

    I usually just pull my entire SC to check the slip moment. I hold the gear in a vice.

    I don't think you need to go thru this trouble though. You mentioned in another thread your wear ring didn't have a scratch on it. I'm willing to bet it's grooved out and needs replacing.

    How many hours on the wear ring?

  7. #7
    Less than 30 hours. It was a little humid today as it was fogging up at the waters surface. Would that have more to do with the speed loss? I am still in the getting use to phase on my RXP.

    Also when I go to flush it should there be a lot of rattling and clackling noises. Like metal rattling?

  8. #8
    Site Admin Green Hulk's Avatar
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    Yes! Our pumps are noisey when running the ski out of the water.

  9. #9
    Nonstop, all day, everyday. 01xdime's Avatar
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    Jerry do any of the pump bearing mods quiet that down? I figured sloppy fit of the pump parts is what makes the noise considering when i put a new wear ring in it quiets down.

  10. #10
    Site Admin Green Hulk's Avatar
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    Come to think of it. My pump hardly makes any noise now with the tripple bearing

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