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  1. #1

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    Riva open loop cooling

    Hi I'm building a gprxp and using a Yamaha skat pump will the Riva open cooling kit work or will I have to modify it any help would be great thanks


  2. #2
    RXP 260 X Short Course Veteran RXP244's Avatar
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    Quote Originally Posted by adambbrxp View Post
    Hi I'm building a gprxp and using a Yamaha skat pump will the Riva open cooling kit work or will I have to modify it any help would be great thanks
    If you can get at least a 12-13mm water line coming off the pump, you should be ok. It will depend a bit on the level off mods you run. I run a 13mm restrictor in my water supply line from the pump and still meter it down a bit at the engine. I run the pump supply straight to the IC and split it up after that. One supply to the engine and one to the exhaust.

  3. #3
    I read through an exhausting detailed build on this site about open loop. My conclusion was buy the $87 30 plate heat exchanger . Look it up. Quite detailed discussion.

  4. #4
    Sanfish's Avatar
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    The SeaDoo pump uses a 3/4 water line and included in the kit is a 8.7mm main water line restrictor (mounted between pump and hull). But can be drilled larger depending on conditions and motor setup (as RXP244 pointed out).

    The rest is pretty straight forward and bulk waterlines are included in the kit. The only thing missing is a Groco strainer. Optional but some feel necessary...YMMV.

    As for strainer, Riva has a kit for that as well (its a Groco): p/n RY1014-SDF-UK

    Official Groco strainers: (add a "-P" to the part below if used in salt)
    WSB750 (what riva sells)
    WSB1000

  5. #5
    I see that restrictor. So has anyone tapped a second cooling on plastic pumps?

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