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  1. #1
    C-Phase's Avatar
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    Question GP800 oil pump. Replacement or rebuild ??

    Sorry title should have read "what is the best way to line up slot in flywheel with the tab for the oil pump"? Is there any trick to lining them up when replacing the pump?
    ski is a 1998 GP800
    Last edited by C-Phase; 04-09-2014 at 12:39 PM.


  2. #2
    xxx2's Avatar
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    I take a flat head and put it straight up and down do the same for the pump and hand thread the two bolts in until the pump sits flush. Do NOT tighten bolts until pump sits flush or you will snap the oil pump... just sold a used oil pump yesterday cause of this

  3. #3
    C-Phase's Avatar
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    Thanks !
    is that slot on the front end of the flywheel?

    I too learned that the hard way. When I took the stator cover loose to free up the starter drive in the fall, I spun the motor with the freed starter to verifying it was working. Not knowing about the slotted oil pump drive I tightened the stator cover back up, heard a "pop" and found the end cap that says Minkuta (or however they spell it) on the bottom of the hull. I wasn't sure where it came from until today when I started it for the first time and saw the leak......
    Anyway thanks for the info!

    PS
    I picked up a used one from e bay today.

  4. #4
    Happily Self-Employed WFO's Avatar
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    the slot is in the end of the flywheel bolt

  5. #5
    C-Phase's Avatar
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    Quote Originally Posted by WFO View Post
    the slot is in the end of the flywheel bolt
    Thank you.
    So trying to turn it with a screw driver wouldn't loosen that bolt at all correct. Should I remove the spark plugs so it spins easier?

  6. #6
    Happily Self-Employed WFO's Avatar
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    No, that bolt should be torqued so it shouldnt unscrew

    I usually just grab and turn the engine coupler in the rear, but yes removing the plugs will help it spin easier

  7. #7
    xxx2's Avatar
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    Quote Originally Posted by WFO View Post
    No, that bolt should be torqued so it shouldnt unscrew

    I usually just grab and turn the engine coupler in the rear, but yes removing the plugs will help it spin easier
    I use the flathead screwdriver for indexing purposes only and spin the driveshaft coupler with your hand. Don't let that big oil line get away from you, it can get messy quick. The same guy who bought pump from me yesterday, bought a gallon of yamalube today...his full oil tank is now in his bilge.

  8. #8
    C-Phase's Avatar
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    Thanks. First thing I did when I pulled that fat oil line off was jam it into the oil tank fill neck and tie wrapped it there

    Since this PWC stuff is new to me & I am replacing this oil pump. Roughly how long should a tank of oil last VS a tank of fuel, 1 to 1, 3 to 1 ?

    I know driving habits have a lot to do with it but I'm just looking for a ballpark so I can keep an eye on it.

    Thanks guys.

  9. #9
    boudin's Avatar
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    Most people convert to pre-mix. Oil lines coming loose is a primary cause of engine failure.

  10. #10
    C-Phase's Avatar
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    Quote Originally Posted by boudin View Post
    Most people convert to pre-mix. Oil lines coming loose is a primary cause of engine failure.
    Yeah I asked that question and got the opposite answer then what you just said .....

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