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  1. #1

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    Water pump seals

    Just bought another project. Seller claimed machine dumps 1 quart of oil per 15mins riding into lake. Said it was coming out exhaust. No smoke, no oil in bilge, motor runs perfect except yes, oil all over my garage floor.

    Didn't even notice at first but this machine amoung a bunch of Riva stuff, has a fresh water cooling conversion (not using ride plate, no antifreeze etc). Narrowed it down, oil is coming out with the cooling water which means the seal between the water pump and oil pump is shot.

    Been 2 years since I even did this seal on a machine. Can they be done from the water pump side with the cover on the machine or do I need to pull the stator cover to replace them? Obviously a lot more work involved pulling the stator cover in an RXP-x

  2. #2
    Kosh's Avatar
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    Pressure test the oil cooler out before you go pulling the pump apart.


  3. #3
    JT jpt7779's Avatar
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    As above, verify oil cooler is not the culprit! Not uncommon with open loop cooling setup.
    I had to replace that same seal, and you need to pull the engine, remove PTO housing to get access to the water pump seals. They are a PITA to remove and need to be pressed in correctly or you can damage them. Itís a good time to replace flywheel bolts, oil screen, etc. New PTO gasket required, consider replacing PTO bearing seal and going to need an alignment. I just did all of this over the winter months.

  4. #4
    Water4fire's Avatar
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    I just bought a wake 155 that is pissing oil into coolant. I am thinking its this dam seal. Never had to do this seal before. Going to tackle it soon. Any input? I have a press and ready to go.

  5. #5
    JT jpt7779's Avatar
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    Click image for larger version. 

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    Check the weep hole #1 for leaks 1st. I had a lot of hot water (open loop cooling) in the hull and finally chased it down to this seal.

    You need to remove the PTO housing to do this job, along with associated parts.

    It is not hard to do, just time consuming, follow the Shop Manual instructions. Correction, removing the old oil & water seal is a PITA without damaging the PTO housing, the rest of it is not bad.

  6. #6
    Water4fire's Avatar
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    Thank you for the info.


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