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  1. #1

    98 1050 with fuel in crankcase?

    Any ideas on what may be filling the crankcase with fuel?? All pistons and rings are good, new spark plugs, it will not start but does backfire through exhause.


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    Welcome to the Hulk

    How much fuel are we talking about?

  3. #3
    Thanks! Alot, when i pull the vaccum lines off the crankcase that attach to the carbs it is blowing out when its cranked.

  4. #4
    ryandi2's Avatar
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    Welcome too the hulk..

    have you ever flipped your ski over and got water in the motor? what kinda ski is it?

    the more info on your ski the better

  5. #5
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by Imca00 View Post
    ...when i pull the vacuum lines off the crankcase that attach to the carbs it is blowing out when its cranked.
    What diagnostics have you done so far?

    Are you sure it is fuel, and not water in the crank case?

    Provide some history for the machine. Has it ever run properly for you?

    Remove the spark plugs. Is there is fuel or water spraying out of the plug holes when you crank?

    Put the spark plugs on the wire ends, and ground the plug bodies to bare metal on the engine block somewhere (bolt head).
    Do you have spark at the plugs when cranking the engine?

    Be careful if there is fuel vapor in the hull. You don't want it to go boom. Ventilation is important.

    If no spark, measure the battery voltage with a multi-meter, while the engine is cranking. Must be over 10.6 volts, or you will not have spark.

  6. #6

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    there are three little drain plugs on the bottom off the case under the pulse fitting

  7. #7
    FLjoyrider's Avatar
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    If it is indeed fuel, check your fuel pump diaphragms the gas can siphon into your crank case if they are shot up. If water was in the crank case at some point.. it could have blown the diaphragms out when u turned the motor over... if you can reach the drain plugs on the bottom of the cyl's pull em, if they are stuck then pull the plugs and ground the sparkplug wires somewhere far away from the cylinders where there can be no open spark.. or if your ski turns over without the key then thats good you can assure there will be no ignition when the gas comes spraying out the cylinders... turn it over repeatedly till no more fluid comes out and then put the plugs back and try starting it. good luck

    ps you don't want to over work the starter so go in like 10-20 second bursts waiting 30 seconds to a minute inbetween, first few times just bump the start button to see how much is going to come spraying out

  8. #8

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    are you storing it with a totally full tank if so your vent can be plugged and the change in tempatures can push it past the daiphrams and seats in the carbs

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