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  1. #1
    "Hustler" Inkaddict's Avatar
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    Riva open loop and doo adapter

    So i know theres tons of threads and heated debate about how to properly set up the open loop on a gprxp. Im in the process of installing the Riva open loop kit. I wanted to try to use the supplied seadoo reducer washer in place of a ball valve. Has anyone tried to do this? My thought was to tap the top of the seadoo pump 1/2 inch thread to 3/4 barb and make a thru hull fitting out of 3/4 female npt - barb fitting and a pipe nipple. The inlet hose for the Riva kit is 3/4 inch. The reducer looks like it will fit snug inside of the 3/4 npt fitting bein held in by the pipe nipple. Im thinkong this will also give me the ability to change reducers as needed with different water temps through out the season.. Any reason this wouldnt work?? I figured i should ask before drilling huge holes in my hull. I can hear Mark calling me names from 2500 miles away already. Lol




  2. #2
    Autosport's Avatar
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    I've tried a number of different open loop setups... all a pain in the Ass as needing adjusting depending on the season. The one I'm running now is Marks (Hydrotoys) setup, ski warms up quicker then it ever did before, and temps rock solid. Have a chat to mark about the setup he's running, and switch to that.

  3. #3
    Moderator beerdart's Avatar
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    Just by a bulkhead fitting.

  4. #4
    RXP 260 X Short Course Veteran RXP244's Avatar
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    [QUOTE=Inkaddict;1568300] Im thinkong this will also give me the ability to change reducers as needed with different water temps through out the season.QUOTE]

    Also, running the Riva thermostat, you shouldn't need to change washer size to regulate water temps. The thermo will keep the engine at the right temp regardless of incoming water temp. You should only use the washer to regulate water flow for pressure. Once right you shoudn't need to change that either. I bleed excess water off the engine at the water pump cover.

  5. #5
    "Hustler" Inkaddict's Avatar
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    Thank you guys...

  6. #6
    cheatin' piston popper addicted's Avatar
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    you need a spherical valve. or a heat exchanger

  7. #7
    "Hustler" Inkaddict's Avatar
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    So after talkin with beerdart i decided to run 1/2 off the pump.. The id of a 1/2 npt is 8.5 mm.. The washer provided with the riva kit is 8mm. Theres not much room for a 1/2 thru hull so i decided to go thru the speedo hole with the most rediculous contraption i could come up with but i think itl work. Its 1/2 on the outside and 3/4 on the inside forthe riva kit. We'll see what happens..

  8. #8
    iron head's Avatar
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    are you running two lines

  9. #9
    "Hustler" Inkaddict's Avatar
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    Quote Originally Posted by iron head View Post
    are you running two lines
    No just 1...

  10. #10
    ahhhh, a thru hull fitting like this would have worked...

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