1990 YAMAHA 50HP POOR IDLE. <br />Changed plugs, new fuel, cleaned lines/carbs etc. Good fuel flow, Engine starts and runs great just won't idle without shaking the whole boat. Idea's please?
if you are hitting on all cylinders, it may just be an idle adjustment. look at the motor running, and observe where the trottle linkage moves, you should see a set screw to adjust, a half turn, or a full turn may be all you need.
