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Thread: Water Pressure

  1. #11
    Senior Member
    Join Date
    May 2010
    Posts
    1,874
    Water pressure over 25-30 psi can push intake gaskets.... I installed pop off valves in my system as I was seeing upwards of 40 psi and was worried that I would push an intake manifold gasket....
    Hay DJ can you post a pic of what you did?

  2. #12
    don johnson
    Hay DJ can you post a pic of what you did?
    Sure, I will snap a few pictures next time I am out.
    What I had done was we took an industrial stainless steel pop off valve and welded it directly to the crossover in the front of the motor. Then we fooled with springs until we got the block pressure PSI we were looking for.

  3. #13
    BadKachina
    Hay DJ can you post a pic of what you did?
    Merc part number 863208a3 is a pressure relief valve.
    http://www.mercruiserparts.com/partsByNumber.asp
    It will go inbetween your sea pump and water pump, you'll need to install a dump for the bypass hose.

  4. #14
    lucky
    cale - Just don't break the boat - you know how she feels about that boat hey ya buddy

  5. #15
    Senior Member
    Join Date
    May 2010
    Posts
    1,874
    Merc part number 863208a3 is a pressure relief valve.
    http://www.mercruiserparts.com/partsByNumber.asp
    It will go inbetween your sea pump and water pump, you'll need to install a dump for the bypass hose.
    cool thanks

  6. #16
    LUVNLIFE
    Sure, I will snap a few pictures next time I am out.
    What I had done was we took an industrial stainless steel pop off valve and welded it directly to the crossover in the front of the motor. Then we fooled with springs until we got the block pressure PSI we were looking for.
    What pressure were you looking for?

  7. #17
    LUVNLIFE
    cale - Just don't break the boat - you know how she feels about that boat hey ya buddy
    No way man She actually bought the new hood scoop for it. It's painted and gets installed tommorrow

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