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  1. #1

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    oil in cylinders after setting for two years

    I tried starting my 1200 gpr after it sat in storage for two years . It would barley turn over so I pulled the plugs and tried it. Huge amounts of oil shot out of the spark plug holes. I cleaned up the mess, put paper towels over the plug holes and it soaked the paper towels. I checked the oil tank and it was empty, The ski is still shooting oil out of the spark plug holes. Where is the oil that was in the tank and how do I remedy this situation. I am guessing their is a check valve in the oil supply line that failed but where is this oil now? Any suggestions on fixing this situation. Would appreciate any advise on this.


  2. #2
    Adam's Avatar
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    That oil will have preserved everything just nicely.

  3. #3
    This is how I run a jetski shop in the desert nmpeter's Avatar
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    you'll need about a box of sparkplugs , an air compressor and two cans of gumout, and a shitload of rags and handcleaner

    I'd suggest buying a couple of pairs of gloves too, this is some of the worst work possible

    charge battery, ground sparkplug caps, remove plugs

    crank engine in ten second bursts with two minutes between cranks to clear as much oil out as possible

    charge battery after ten cranking cycles ( this work can easily smoke your battery and starter)

    put a teaspoon of gas in both jugs

    new plugs ( hand tight is ok, they will be going in and out, alot)

    crank engine, it will sputter, smoke and then and then stall,

    fresh plugs, more gas down jugs, old plugs spray down with gumpoout, blow off with compressed air

    rinse and repeat until the engine will run. More gas won't help

    try to do it when the neighbors are away, and without fail, you need some big pans around the exhaust as all manner of oil, water and fuel will be forthcoming

    the oil leaked thru the bad check valve, into the carbs and then down into the crankcases

    budget an hour or two for this work.

    hint: if you use starter fluid, you will blow the crank seals and ruin the engine

    once the engine will run for more then ten seconds on its own, it's time to hook up a water hose and finish the job

    standard practice on water applies, engine running?..water on..engine stalled?..water off.

    good luck

    I'll warn you one more time:

    no starter fluid
    the ski will be puking nasty crap everywhere
    Last edited by nmpeter; 09-08-2019 at 03:06 PM. Reason: important bit emphasized

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  5. #4
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by nmpeter View Post
    ... ground sparkplug caps ...
    Do not skip this part. If the spark plugs are not in the engine, ground those spark plug wires.

    Doing otherwise is risking igniting fuel fumes from a stray spark while cranking the engine.

    You do not want to start a fire.

  6. #5
    This is how I run a jetski shop in the desert nmpeter's Avatar
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    oil in cylinders after setting for two years

    I forgot an important step

    Add some oil to the oil tank and when you get it running and done clamp the line from the tank off until the check valves are replace. Remove the clamp to use the ski

    Use a high quality injector oil

  7. #6
    steve45's Avatar
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    Warning: better be sitting down when you order new check valves!!!

  8. #7
    This is how I run a jetski shop in the desert nmpeter's Avatar
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    I'd be happy to drop the $60+ not to have to deal with an oil flooded engine, again

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