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  1. #1

    Polaris spark but no fire

    I am a first time ski owner, i picked up a 2000 Virage that had laid up for two years. I replaced the battery, cleaned the fuel lines and carb and got it running. Not great but running. 3rd time out it would not get over 3000 rpm's. Got it home and now it won't start. I can see spark from plug wires to the plugs and there is fuel flowing into the carb. But, there is no fire in the chamber.? Plugs appear normal with no fouling.

    I tried pulling the plugs and attaching them to the plug wire and tried looking for the spark at the tip for the plug but never see it.

    Can too rich a mix cause no fire? The ski is stock so it is not setup premix and i assume still has the same electrical and stator. The MFD operates normally except that the oil level stays pegged since i got it.

    Thanks


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

    Two or three cylinder Virage?

    Have you checked compression?
    What was the max RPM you had on the water before the problem occurred?

    Did you actually disassemble the carb and clean it internally?

    Check for water in the fuel?
    If you spray a little gasoline directly into the carb intake (watch out for a backfire), does it start?

    What do you mean you can see spark from the wires to the plugs?
    The plugs will only show spark if the plug body is grounded to the engine metal (no paint in the way).

  3. #3
    ph2ocraft's Avatar
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    Hi Charlie, I'd also like to say WELCOME to the Green Hulk Forums!!
    What is the spark plug number you are using?
    Can you borrow or purchase an in-line spark tester?
    Compression numbers??

  4. #4
    I like Boobs. wetwolf's Avatar
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    well, you have 2 out of 3 to make an engine run.......

    so whats the compression?, and welcome to the board.

  5. #5
    It's a 2 cylinder Virage. No water in the fuel, it's fresh fuel an nothing in the water trap. I did not disassemble the carb once i saw fuel passing because i did not have a gasket kit(can i do it without one?). I put fuel in the carb but no fire. When i pulled the plugs they are wet from fuel and oil mix.

    i did see spark from the wire to the plugs by pulling the plug wire off an inserting a screw into the plug wire. Holding it close to the plug and hit the start button.

    I had the rpm's up to around 6000 sustained before this issue happened.

    I don't have anything to test compression? even without compression it would still fire though right?

    Thanks all.

  6. #6
    I like Boobs. wetwolf's Avatar
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    no compression, no fire. the 3 things a motor needs to run are fuel, spark, and compression. If you are missing any one of these, it won't go.

  7. #7
    It took me some time to line up a friend with a compression meter last weekend. Both cylinders tested to 140lbs so all was good. Friend suggested replacing the plugs. $3.47 later for two plugs and it runs perfectly.

    Same friend asked me about my last trip out and i told him about how we idled around the lake a lot. He told me that a lot of idling was not good and will foul plugs. Guess it did and now i know something not to do. At least a learned something.

    Thanks guys.

  8. #8
    ph2ocraft's Avatar
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    How many hours were on the plugs?
    If changed at their normal service intervals you shouldn't have a problem fouling plugs.
    Have you checked to see that your oil pump is properly adjusted?
    What type of oil are you using?
    What spark plug number did you install?
    What number and brand were they before?
    You should inspect the carbs and makes sure the needle/seat assemblies aren't leaking and dumping excess fuel into the cylinders.

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