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Yamaha 50 2 stroke runs rough

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  • Yamaha 50 2 stroke runs rough

    I have a 50 hp yamaha 2 stroke, oil injected, probably around 2001 or so and it just started running rough, I've changed the plugs, added carb cleaner, primed the bulb while running, checked all electrical connections and vent to the tank. Still runs rough, it starts good, idles rough and is sluggish to get out of the water, even when out of the water it runs rough. Seems like it smokes more than ussual and I can smell gas while it is running. Could it be a coil or maybe a stuck float on one of the carbs, any suggestions?

  • #2
    Test compression, spark, timing, and then look at the fuel pump for bad diaphragm.
    If all that is good then pull and clean carbs and adjust like service manual call for

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