I have a pair of 2004 Suzuki 140's. One engine sometimes idles fast like the throttle is struck and them sometimes dies while when the throttle is returned to the idle/neutral position. Other than this nuisance, it runs great. I have checked all cables/linkage and they operate fine, nothing sticking. When itis idling fast, it is a smooth idle, not rough. I already checked the idle air screw and checked the adjustment. Fuel filter on the engine is clean and water separators/filters are used on both engines. From the odd behavior, I thought maybe electrical/computer related or some trash somewhere in the system or a sensor somehwere. Sometimes the engine runs perfectly fine at idle. I bought the shop manual but it didn't help solve the problem. Anyone have any ides where to look?