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  1. #1

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    2002 Virage problem...a real mystery to me.

    I have a 2002 single carb virage ski.
    It will rev up on the trailer bogs down and smokes on the water. It tops out at 3000 rpm.
    The front cylinder is hot and the rear cylinder is cold. If I pull the rear plug the running engine does not change, If I pull the front one the engine dies. The compression is 125 on the rear and 130 on the front. Both plugs have spark when grounded to the case. I swapped plugs without any change.
    This ski was running great last year and then bogged down while running I limped it back to the dock. I thought it was the carb, but its looking like its not.


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    Is this a fuel injected engine or carburetor?

    Need to be sure before suggesting any further diagnostics.

  3. #3

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    Hi,
    It is a single carb ski.

  4. #4

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    Anyone with ideas?

  5. #5
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by dalepatter View Post
    Anyone with ideas?
    Two cylinder carburetor engine - correct?

    The two cylinder engines fire both plugs together every time either cylinder needs spark. That means you can swap the spark plug wires between plugs and the engine should run the same. Just swap the plug wires at the plugs. Any difference in which cylinder is running cold?

    Another thing to check is the crankcase intake reeds. If the reeds are damaged on one cylinder then that cylinder won't run properly.

  6. #6

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    Thanks, it is a two cylinder engine. I had not swapped the spark plug wires because the one cable is too short. I will remove the Electrical box so it will reach. Then I can find out if the cylinder problem chases the plug wire. I will also check the reeds.

  7. #7
    Click avatar for tech links/info, donation request K447's Avatar
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    If you have an inline spark tester, you can use that to extend the shorter plug wire.

  8. #8

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    So I am perplexed, I was sure that it was what you mentioned Keith. But the reeds look mint. There were no burns or breaks, they were all closed nicely. And when I swapped spark plug wires the rear cylinder still stayed cold. The probblem did not move to the front. When I pull the front plug (with either wire) in the front the engine dies. When I pull the plug wire in the rear (with either wire) there it still runs
    I double checked compression and I still have 125 in the rear and 130 in the front.

  9. #9
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    Sure you don;t have a bad plug?

  10. #10
    Click avatar for tech links/info, donation request K447's Avatar
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    Could be the stator or the CDI is not triggering on the Hall Effect sensor for the PTO cylinder.

    You can check the Hall Effect sensors in the stator using a 9 volt battery and multi-meter.

    If the stator Hall Effect sensors BOTH test good (that means each sensor suddenly changes to low ohms as the flywheel slowly turns) then you can swap the Hall Effect trigger connections at the CDI. That effectively switches which internal 'channel' of the CDI is firing the MAG cylinder.

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