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  1. #1

    Cavitates on top top end?

    Whats it mean when it feels like its cavitating at top speeds throttle wide open? Feels like its not hooking, not getting water in it to give it any thrust almost? Does this sound normal? Happens in chop and on flat water, its like the ski isn't in the water enough but yet I heard ya want it out to go faster so I'm lost? Sponsons are stepped as well. Any suggestions?


  2. #2
    Greenhulk Grasshopah (DRC) HallPass's Avatar
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    i would get a pump seal kit, if you dont have one already....

  3. #3
    I have a pump seal kit, I have carls level 1 kit on it from island racing..

  4. #4
    Greenhulk Grasshopah (DRC) HallPass's Avatar
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    hm... does the kit include an impeller? I replaced mine and got a little less cavitation.

  5. #5

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    Quote Originally Posted by Dicedrop25 View Post
    Whats it mean when it feels like its cavitating at top speeds throttle wide open? Feels like its not hooking, not getting water in it to give it any thrust almost? Does this sound normal? Happens in chop and on flat water, its like the ski isn't in the water enough but yet I heard ya want it out to go faster so I'm lost? Sponsons are stepped as well. Any suggestions?

    If you are cavitating, your rpms should go up. Do they, or are they where they should be? Generally speaking, the faster you go through the water, the more water is FORCED into your intake. It is a rare bird that has not enough water, but rather to much water at high speed. I'm kind of wondering if there is not something inside of your intake area that is causing a lot of turbulance. Water that does not flow smoothly into the intake because of some type of obstruction will cause your grief. Look into your pump tunnel for some obstruction. It might be obvious, like a rope or twig, or something subtle like a bent scoop, or impeller blade. The more water bends and turns in the intake area, the more prone you are to cavitation.

    How is your speed effected?

  6. #6
    mrbtd's Avatar
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    If your coming out of the water your PV's could be opening and closing - this is one of the downsides of electric PV's. You will feel a bit of hesitation then a grab and go when this happens.

  7. #7
    I will look into the grate area to see if theres any obstructions, and yea it does feel like its hooking and then not hooking at high speeds... I cant complain top end speed wise, I dont have the gps but it does beat the stock kawi 250 on top everytime when its in the water, it pops in and hooks then pops out and I guess it cavitates as they say... I m no mech, but this is whats happening, I can def. sense a loss of speed somewhere, I just feel if it stayed in the water it might go faster.

  8. #8
    Oh yea whats a PV?

  9. #9
    mrbtd's Avatar
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    Power Valves

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