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  1. #1

    What's a good substitute for "SeaDoo Jet Pump Synthetic Polyolester Oil 75w90 GL5"?

    The repair manual says to ONLY use "SeaDoo Jet Pump Synthetic Polyolester Oil 75w90 GL5". Is that basically just gear lube? Can I just use Royal Purple Marine 75w90? I have a enough left over from when I changed the outdrive lube in my boat.

    link to RP 75w90: http://royalpurple.com/gear-oil-m.html

    P.S. I tried to do a search first, but the word 'oil' is too short for the search function.


  2. #2

    Join Date
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    Most any hypoid gear oil will work in the pump. If you choose not to use the BRP OE stuff then consider using a fully synthetic automotive type gear oil (75W/90 or 75W140). Better yet, synthetic lower unit oil is a little better because it contains a dye that turns white in the presense of water.

  3. #3

    Join Date
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    Quote Originally Posted by Matt's 175 View Post
    The repair manual says to ONLY use "SeaDoo Jet Pump Synthetic Polyolester Oil 75w90 GL5". Is that basically just gear lube? Can I just use Royal Purple Marine 75w90? I have a enough left over from when I changed the outdrive lube in my boat.

    link to RP 75w90: http://royalpurple.com/gear-oil-m.html

    P.S. I tried to do a search first, but the word 'oil' is too short for the search function.

    You can use the Royal purple marine oil that you have left.

  4. #4
    96 xp stroked, coffmans pipe, r&d 61.8mph gps!
    Join Date
    Oct 2007
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    76
    I use the Mobil 1 75/90 fully synthetic available at any auto parts and have had no problems

  5. #5
    Thanks for the responses everyone.

  6. #6
    I use Castrol Syntec 75W90 Gear Lube

  7. #7

    Join Date
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    I use the amsoil synthetic stuff

  8. #8

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    Quote Originally Posted by gorilla03 View Post
    I use the amsoil synthetic stuff
    +1

  9. #9

    Join Date
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    do the newer models use the same gear oil? like 06 rxp and up?

  10. #10
    Ride it like you stole it
    Join Date
    Jun 2008
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    Gardendale,Alabama
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    Back in the day

    During 1995-99 a couple of my friends that I raced CC with used Amsoil 2 stroke oil in the pump.Eventualy I tried it and did not have any problems with any sort of bearing wear or failure.
    Keep in mind that we were constantly swapping props (changing the oil).
    2 stroke oil was always on hand.
    Not having that awful smell to deal with was also a bonus.
    Then the Scat Trac magnum pump came on the scene,(sealed bearings)(if I remember correctly No Oil in the pump)
    If I were you I would use a good syn. gear oil.
    (although I still use AMSOIL 2 Stroke oil,with no problems)

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