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  1. #1
    Kiwi spanner handler
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    FX 160 dropped valve (common?)

    Have a 2008 FX 160 HO that has dropped an exhaust valve after 10hrs of general riding has anyone seen this before? Yamaha is saying water damage as the ski was full of water from towing it in after the valve broke.

    Thanks for any input

    Jason......


  2. #2
    Jason, That happens to engines. It was common for the fx 160 hp 1100cc engine. I had problems like that where the collar fails to lock the valve and lets it drop to the cylinder.

  3. #3
    baba booey's Avatar
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    Quote Originally Posted by jasonze View Post
    Have a 2008 FX 160 HO that has dropped an exhaust valve after 10hrs of general riding has anyone seen this before? Yamaha is saying water damage as the ski was full of water from towing it in after the valve broke.

    Thanks for any input

    Jason......
    That engine is usually pretty bulletproof. Hmm

  4. #4
    fx160's Avatar
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    Quote Originally Posted by baba booey View Post
    That engine is usually pretty bulletproof. Hmm
    thats what i have herd as well
    only troubles i have herd of have been with water injestion

    kev

  5. #5
    New ski! Markb47's Avatar
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    How did the ski fill with water when towing it back?

    I never had any trouble with my fx160 and i never got any water inside the hull while riding or on the anchor.

  6. #6

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    Quote Originally Posted by Markb47 View Post
    How did the ski fill with water when towing it back?

    I never had any trouble with my fx160 and i never got any water inside the hull while riding or on the anchor.
    If a fx160 is towed at more than 5 mph, you risk water making it's way back through the cooling system, resulting in water inside the ski. Some owners fit a tap on one of the hoses to prevent this ( if towing above 5mph is needed ). I carry a large C clamp type thing incase I need towed.

  7. #7

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    [QUOTE=timmy_philson; It was common for the fx 160 hp 1100cc engine. .[/QUOTE]


    I think your definition of common varies from most peoples'. I have never heard of this issue. Also, the fx160 engine displaces 1052cc

  8. #8
    volltrex's Avatar
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    Not a common problem at all.........the MR1 is about as reliable as a PWC motor gets!
    Has it been stripped down? Valve stems can break due to corrosion.......should be fogged if not going to be used for more then a week. Did the valve 'drop' or did the piston go into it due to a bottom end failure. Also could have been hydro locked at some point.
    There was a problem with a small batch of late 07's........if i can remember there were imperfections in cylinders which led to high oil consumption & ultimately detonation!

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