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  1. J

    2005 Yamaha F115 won't run above idle.

    After 6 months on the trailer and filling the tank with ethanol-free gas, I launched the boat and started it. It started and idled fine. However, as soon as I tried to increase the rpm the engine ran extremely roughly for a few seconds and then died. Tried this several times with the same result...
  2. J

    Running engine on Trailer.

    I have a 2005 Yamaha 115 outboard. When the engine is out of the water can I run it using the flushing inlet (just below the cowling) as the cooling water inlet OR must I use a water muff on the inlet in the lower unit?
  3. J

    1994 Yamaha 4hp 2-stroke tuning.

    Thank you for your response. When I rebuilt the carb I drained all of the fuel from the engine. Easy to do with this small engine. So the engine sat for 3 years but without a drop of fuel in it. I think your last suggestion is most likely the problem - the three screws in the fuel system...
  4. J

    1994 Yamaha 4hp 2-stroke tuning.

    Thanks for responding. No, it wasn't running very well. Sorry, I don't remember why I rebuilt the carb. Was several years ago. Motor not used until a couple of days ago. Runs fine at lowest throttle.
  5. J

    1994 Yamaha 4hp 2-stroke tuning.

    After rebuilding carb and replacing spark plug, engine will only run at lowest throttle setting. As soon as the throttle is advance (idling or in gear) the engine begins to die and will die if the throttle is further advanced. Problem gets worse as the engine warms up. Would appreciated help.
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