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Thread: Cavitation! :(

  1. #1
    Sammynels's Avatar
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    Lightbulb Cavitation! :(

    My 2007 RXT seems to be Cavitating. Only engine upgrades are X-Charger and Injectors. Seems like I'm getting high RPM's out of the hole but should be "digging in" a hell of a lot better. I thought it was the pump seal so I pulled the pump out and replaced with an R&D Pump seal and closely inspected the imp and wear ring and they looked great. Basically very very little clearance and no big digs into the wear ring. Thoughts from the experts? Maybe have my stock props repitched? My RPM's WOT is at 8190 btw and gets up there quick with a "fake" top speed of 70 (tops out stock MPH meter) on flat water. Thanks again in advance, you guys are amazing.


  2. #2
    Lightning1's Avatar
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    A prop will help you out. I am guessing 14/19, but I am sure somone with an rxt will chime in

  3. #3
    carlosdelgado's Avatar
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    I'm running a Solas 14/19 with the same set up as you on my 2007 rxt. I'm very happy with it with No cavitation on my ski. good luck.
    Last edited by carlosdelgado; 08-28-2014 at 12:16 PM. Reason: any

  4. #4
    Click avatar for tech links/info, donation request K447's Avatar
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    Is it cavitation or ventilation?

    Air leaks into the pump area forward of the impeller can greatly reduce thrust from standstill.

  5. #5

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    I have almost the same setup and a solas 14/19r works great. Mine is an 05 but I have an x-charger, 42 lb injectors, kanaflex intake and R&D pump seal. I also had to go with a stainless steel wear ring. So far I have a top speed of 71 on GPS. But I'm 325lbs and had full take of gas and some other gear on it as well, and the cove I was in was to short. My next step is a pump wedge.

  6. #6
    Sammynels's Avatar
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    Should I do 14/19 or 15/20? Planning to do intake and grate soon...

  7. #7
    Quote Originally Posted by Sammynels View Post
    Should I do 14/19 or 15/20? Planning to do intake and grate soon...
    Without an exic a 14/19 is the prop for you. After you get the exic...4"+ intake...every tweek to the hull/plate/flushed grate....you may be able to spin a 15/20....may.

  8. #8
    Lightning1's Avatar
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    how old is your carbon seal as well? weak bellows/worn seal could allow air from the hull in front of the prop

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  10. #9
    imp0ster's Avatar
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    Check your engine mounts. OEM mounts break allowing the engine to slide under torque causing cavitation on the carbon seal. When you lift the engine you'll know.

  11. #10
    Sammynels's Avatar
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    Original carbon seal. Big job to replace??

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