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Yamaha 200 hp 1992 sudden stop noise

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  • Yamaha 200 hp 1992 sudden stop noise

    My 1992 200hp Yamaha 2 stroke was running fine at 3/4 throttle when it suddenly made a bad noise and shut down. After towing it in and getting it home I checked compression all cyls. were fine except one. All were 120 and the one was 70, it sounded like it broke a rod when this happened but after doing the test it appears something else has happened. The engine will start that was tried for about 5 seconds but something has definitly gone wrong. The only thing I can figure is a rod bolt snapped and or stretched only pulling down that piston part way and then pushing it up all the way? Any ideas? I have not started tearing down the engine yet, was tryying to get some info first. thanks

  • #2
    Re: Yamaha 200 hp 1992 sudden stop noise

    I would start by pulling a head and having a look.
    if this is a salt water motor I would inspect the shift shaft before wasting any time at all.
    no tech questions by PM, they wont get answered.
    you have to be trusted by the people that you lie to .

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    • #3
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      Re: Yamaha 200 hp 1992 sudden stop noise

      This is a freshwater engine. I will pull the head on the low cyl. side and see what is going on. thanks

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