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  1. #1

    polaris sl900 oil pump

    Hi guys new to the forum. I just wanted to ask is it normal or should I say common for the self oiler to stop working on these engines? I bought one about a month ago and it ran great but after running the better part of a day this weekend it stopped running so I tested the compression to find 30 psi on the rear cyl.

  2. #2
    I like pipes. I love boost Mr. GP1800's Avatar
    Join Date
    Jun 2010
    Milwaukee WI
    These oil pumps almost never fail. However, the lines from the pump can fail. If the oil pump failed, all 3 cylinders would have been messed up. I am more willing to bet it was caused by dirty carbs. Do you still have the grey fuel lines? Those are known to plug up carbs and kill motors.

  3. #3
    No the fuel lines are black. Im thinking about getting the parts to rebuild but not sure yet and don't really know why this happened.

  4. #4
    Join Date
    Jul 2007
    Cedar Rapids,Iowa
    Can be caused by lean fuel condition, Carb or a air leak, maybe on the rear seal, A bad oil pump would normally take out bearings or scuff cyl. walls, not burn down pistons. post pictures of what you find if you pull the head.

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