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  1. #1

    RPM limited to about 4k in the water.

    I have a of 2001 Virage skis. The ski runs fine, revs well, and seems perfectly normal while on the trailer. When in the water under a load it will barley pull itself. It is limited to about 4000 RPM. My initial thoughts were that the micro switch on the reverse are might be faulty. No luck! I have gone thru pulling the grey and tan wires to eliminate the REV limiter but that does not seem to have any affect on the performance. I have ohm'ed out the stator wires and plug wires per the tests listed in the Service Repair Manual and all seems in check. Is it possible that a faulty stator would limit RMP in the water and seem normal on the trailer. Still starts with a bump of the button. (I have pulled the pump and made sure there is no blockage or debris in the housing.)


    Any ideas?


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

    Have you checked cylinder compression?

    Is this machine new to you?

    Has it ever run properly for you?

    Any service history?

    Correct spark plugs installed?

    2 or 3 cylinder engine?

  3. #3
    Have you checked cylinder compression? - No I have not ran a compression test but will run out in a few min and see what I get.

    Is this machine new to you? - No I have owned the skis for about 4 years.

    Has it ever run properly for you? - It has never given me any problems other than general maintaince issues.

    Any service history? - I replaced the battery last year which is when the problems kinda started happening. It was a GEL cell recomend by a local "small town" shop. I have recently read that they are real hard on the chaging systems and causing my suspecions whit the stator.

    Correct spark plugs installed? - Yes, Replaced with factory recomendation. Off the top of my head I think they are BPR8ES plugs.

    2 or 3 cylinder engine? - 2 Cylinder w/ Carb

  4. #4
    Compressions...Front = 140 Rear = 135
    Plugs installed were BR7ES.

  5. #5
    Click avatar for tech links/info, donation request K447's Avatar
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    You have two identical Virage 700 carb'ed machines - correct?
    That may be useful for some diagnostics, by swapping parts between the two.

    Are the original gray Tempo fuel lines still installed on either machine? They can clog the carbs, and cause all sorts of trouble.

    What battery is in there now?
    What voltage do you have at the battery when the engine is running?
    Should be 13.5 to 14.5 volts.

    You may find this helpful;
    How do I test old and new CDI, Magneto and Ignition coils?

  6. #6
    '94 SL 750
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    Does it run smooth at 4000 RPM or feel like it is trying to go faster but can't?

    If the later, sounds like a fuel delivery issue. Could be lines, filter, carb/s. If it has been sitting these would be the first things I check.

  7. #7
    There is no surging at the 4000 rpm. It sounds like you tied the rear to the boat dock and tried to go. I thought it may be a fuel delivery problem. (And it may still be...) So I replaced all the fuel lines and even swapped the carb off my other ski so that I had a known good. Still delivered the same results.

  8. #8
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by CraigC View Post
    There is no surging at the 4000 rpm. It sounds like you tied the rear to the boat dock and tried to go. I thought it may be a fuel delivery problem. (And it may still be...) So I replaced all the fuel lines and even swapped the carb off my other ski so that I had a known good. Still delivered the same results.
    You could try swapping the CDI, and disconnecting the RPM limiter wire.

    Make note of any part number differences, and keep organized regarding which parts are from which machine

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