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  1. #1

    1999 waverunner xl760 questions

    So my fuel petcock is really hard to turn. Anyone had this issue and have a fix for it? Also should I switch over to premix or keep it as is? My waveraider is premix so I am not talk familiar with the oil injection system. The person I bought it from said they never had a problem. Last thing, is there anything I can do to make it go faster? My waveraider had some riva mods and was quick as hell, but now I must sell her.

  2. #2
    smoofers's Avatar
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    Your petcock is probably at the end of its life and needs to be replaced. The O-rings inside of it can dry out making it hard to turn, but even worse, allowing air to enter you fuel system, potentially causing a lean condition that could burn up your motor. A new OEM petcock is like $50. As for the oil injection, it will be just as reliable as premix IF you change out the oil injection hoses between the pump and the carb for new ones. Most oil injected motors never have oil pump failures, the oil lines crack or break, starving the engine of oil.

  3. #3
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by smoofers View Post
    ... As for the oil injection, it will be just as reliable as premix IF you change out the oil injection hoses between the pump and the carb for new ones.

    Most oil injected motors never have oil pump failures, the oil lines crack or break, starving the engine of oil.
    http://polarispwcknowledge.shorturl....t-things-to-do

    On Polaris watercraft the OEM oil hoses were made from remarkably good hose material. 7mm OD lines, they tend to last a long time.

    The common failure point is the hose clamps and sometimes the last 1/2” or so of the hose would harden and work loose from the nipple fitting.

    The OEM oil injection system tends to be reliable.

    Maintain the oiling system;
    Check hose clamps.
    Check for age hardened hose ends
    check for hose rubbing/wear against the engine

    Replace the oil filter with new OEM

    Use decent quality 2-stroke oil.

    Check that the oil pump cable adjustment is correct.

  4. #4
    Thanks for the advice. I have checked the oil lines and they look good. The petcock on the other hand crapped out. Can I use the one off my 95 waveraider or are they model specific? I figure they all do they all work the same


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