Re: yamaha 40 hp wont idle NEED HELP PLEASE
Do you have a shop manual? Poor idle could be caused by a multitude of issues including the carbs low-speed being too lean or too rich or the timing could be off. What do you mean it doesn't idle? You start it and it immediately dies or will it idle for a while then die? Does it run at high throttle speeds? Does it run on muffs?
Chris