bdavis
New member
I've got a new 40hp Yamaha outboard 4 stroke on my boat. It ran perfect last fall when it was put away. It was fogged at the dealership where I bought it. All the old gas was drained from the tank in the fall.
Now, after four tanks of fresh gas this spring. The motor still idles rough and bogs when accelerating. What I mean by "bogs" is that it's almost as if it cuts down to one cylinder when I give it gas. If I back off on the throttle quickly then accelerate again, it picks up but still kinda spits and sputters and chugs for the first few hundred feet until it clears up.
Any idea what might be causing this? I'm thinking a stuck needle in one of the carbs. THis is the first time I've ever had an outboard engine fogged before storring it. Actually, I didn't even ask the dealer to do it but they did anyways since the boat was there in the fall for other warranty work. I've never had a problem with an outboard before in regards to winter storage. Could the fogging have gumed up one of the carbs?
Now, after four tanks of fresh gas this spring. The motor still idles rough and bogs when accelerating. What I mean by "bogs" is that it's almost as if it cuts down to one cylinder when I give it gas. If I back off on the throttle quickly then accelerate again, it picks up but still kinda spits and sputters and chugs for the first few hundred feet until it clears up.
Any idea what might be causing this? I'm thinking a stuck needle in one of the carbs. THis is the first time I've ever had an outboard engine fogged before storring it. Actually, I didn't even ask the dealer to do it but they did anyways since the boat was there in the fall for other warranty work. I've never had a problem with an outboard before in regards to winter storage. Could the fogging have gumed up one of the carbs?