Rear cylinder plug is dry. Need advice Yamaha 1200

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  1. #1
    PWCToday Guru
    Join Date
    Sep 2007
    In the water

    Rear cylinder plug is dry. Need advice Yamaha 1200

    1998 Yamaha xl1200
    just bought it had great compression upon purchase.

    Had it it out once for an hour. Then next time out it shut off. Limped it back to the dock. Had to wait a minute or two to restart. Felt like battery was dead. Hard to turn over. Once it fired it ran okay for a few minutes then died. Had to do this multiple times to get it back into the dock.

    Battery is holding charge. Volt meter reads into the high 13 volts when on trailer and throttle is revved. Seems battery and stator are functioning.

    Pulled plugs. Front two plugs have the dark brown/tan color and are wet. But the rear cylinder plug is dry. I donít feel any metal on that plug. Thinking loss of fuel and oil injection to the rear cylinder as possible issues. Out with the family camping. I didnít bring the compression gauge to verify cylinder damage.

    What are are your thoughts? Anyone have a similar issue on the 1200 non power valve Yamaha?
    SeaDoo Hx
    Kawi 750 sx
    Kawi 550

  2. #2 Is My Home Away From Home Rushford_Ripper's Avatar
    Join Date
    Dec 2009

    Re: Rear cylinder plug is dry. Need advice Yamaha 1200

    Talk to Bryan, he knows all about this topic. They had and were know for oil line issues for sure if I recall.

  3. #3 Is My Home Away From Home WFO Speedracer's Avatar
    Join Date
    Aug 2006

    Re: Rear cylinder plug is dry. Need advice Yamaha 1200

    yep sounds like you have seized a cylinder, oil lines come off either at the carb or at the pump, I have also seen the check valves in the oil lines stop up as well
    Y'all know me, still the same O.G. but I been low-key
    hated on by most these &^$$@s with no cheese, no deals and no G's, no wheels and no keys, no boats, no snowmobiles, and no skis, mad at me cause I can finally afford to provide my family with groceries

    WWSRD , What would Speed Racer do ?

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