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  1. #1
    turttle crusher's Avatar
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    svho is dead after 30 hours!!!!

    Hey guys this is my first post, anyone ever hear of a yamaha 1.8 liter motor with 30 hours on it shutting down while crusing across a lake! Ive been in motorsports all my life, owned a new yzf250 every year i raced motocross and ive never seen or heard anything like this Before. I had put 6 hours on the ski the previous 3 days, as one can imagine, with a brand new svho, completely problem free. Always allowing time to warm up. After a 300 yard taxi through a canal, crusing at 40mph for 3 minutes, i throttled up and headed out across the lake. 20 seconds later, i hit a 1 foot boat wake at 60, (nothing out of the ordinary) when i landed i thought my lanyard had detatched, rpm was ZERO. i tried a relight, nothing!! Starter just spins, no flywheel engagement. Flipped ski over, pump was free, no rope. i know i had cooling water when i was cruising at 40, i was heating my left foot. Had 10 hours on fresh marine 4stroke amzoil, same as many of you run. Oil level was good. I could understand if i canned a starter and it wouldnt start after I shut it down, but this is different. Im 3 months out of warranty, perfect. Any thoughts?? Shear a crank?? Ski is bone stock


  2. #2

    svho is dead after 30 hours!!!!

    Check the throttle maybe ? I remember one friend could not start and the problem was That thottle cable was too tight

  3. #3
    turttle crusher's Avatar
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    i know its fly by wire, your thinking that the throttle sending module (sry i dont have my service manual handy to reference proper terms) may have failed?

  4. #4
    Ale's Avatar
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    check timing chain... common issue on svho

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  6. #5
    turttle crusher's Avatar
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    really the timing chain?! Thats SCARY!! What normally is found?

  7. #6
    95.4mph FZR FZeeR's Avatar
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    Were you hard on the throttle when you landed?

  8. #7
    turttle crusher's Avatar
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    Around 85%

  9. #8
    turttle crusher's Avatar
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    Nahe888
    Sorry i didnt see your whole post. The throttle cable slack is properly set. Thanks! Any other thoughts?

  10. #9
    95.4mph FZR FZeeR's Avatar
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    You checked all pipes and connections under the seat? Does the motor start to turn at all?

  11. #10

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    Pull the oil filler cap ( where you put the oil in) and look inside the hole and see if the cam is rotating when you try to start the engine if NOT tha cam chain has broken or possible the flywheel came loose. Tommy Jordan

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