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  1. #1
    BLACK MAGIC HEADERS hydrojunkie's Avatar
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    how about this shit

    while tuning my ski i noticed it lost power be fore the hydro drags and at the drags.
    what happened was my crank gear spun and it caused my cam timing to be off about deg. notice the marks on the crank and counter balancer are not lining up.

    HOW TO CHECK IT
    PUT ENGINE CYL 3 @TDC
    LOCK CRANK
    REMOVE PTO COVER
    REMOVE MAG

    HOW THIS HAPPENS
    GOING FAST COMING UNHOOKED THE HOOKED

    WHAT IT DOES
    CAUSES LOSS IN COMPRESSION AND POWER LOSS BIGTIME.

    HOW TO FIX IT
    HAVE A QUALIFIED MACHINEST CUT IN A KEYWAY TO LOCK THE GEAR IN PLACE.Click image for larger version. 

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  2. #2

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    wait, what? they aren't keyed stock?! that's a pretty poor design to just press it onto the crank. is the cam gear keyed?

  3. #3
    West Texas RXP skoepp's Avatar
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    Cam gear bolts on to cam shaft - solid.
    The sprocket on crank that runs cam is solid, one piece.
    Last edited by skoepp; 12-15-2010 at 03:19 PM.

  4. #4
    BLACK MAGIC HEADERS hydrojunkie's Avatar
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    Quote Originally Posted by got wake? View Post
    wait, what? They aren't keyed stock?! That's a pretty poor design to just press it onto the crank. Is the cam gear keyed?
    no just pressed on.

  5. #5
    BLACK MAGIC HEADERS hydrojunkie's Avatar
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    IT HAPPENS ALOT BUT PEOPLE DONT KNOW WHAT TO LOOK FOR OR SYMPTOMS. WHEN EVER YOU BUILD A ENGINE YOU MUST ALWAYS DO A COMPRESSION CHECK PRIOR TO START UP THEN ABOUT EVERY 10 HOURS TO SEE IF ALL IS GOOD. THIS COULD HAVE BEEN AVOIDED.
    AGAIN IMAGINE GOING TO THE DRAGS AND HAVE YOUR ENGINE AT 75% POWER.

  6. #6
    Richieb's Avatar
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    Holy fook...!!!!

    Time for a lightened counter-balancer weight.

    If what you say pulls the gear round, then my guess is the weight eventually pulls it round.... bit by bit..!!
    Last edited by Richieb; 12-13-2010 at 08:05 PM. Reason: Thought about it!!

  7. #7
    West Texas RXP skoepp's Avatar
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    Was the crank and/or counter balance lightened?
    Just asking?
    I was not sure what all Les does to the internals.

  8. #8
    Richieb's Avatar
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    Skoepp...


    You reading my mind from over there!!!??

  9. #9
    BLACK MAGIC HEADERS hydrojunkie's Avatar
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    Quote Originally Posted by richieb View Post
    skoepp...


    You reading my mind from over there!!!??
    no only crank. It happens from riding hard staying hooked up then coming unhooked then hooked again.

  10. #10
    West Texas RXP skoepp's Avatar
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    Maybe counter balance needs to be lightened too.


    You got me thinking, so I pulled my manual and it does not say to check markings with crank tool inplace, but does show a pic of crank locked and markings perfectly lined up.
    Go figure.

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