not sure of the year model but its on a 1987 pontoon boat. I have a 75 horse mercury when not in the water it does just fine. when in the water it bogs down and wont go full throttle. I put a new fuel line and bulb on it and I have tried pumping the bulb while throttle is up and still no change. the only change I get is when I push the key choke in and it tries to open up till I let off the choke then it goes back to the same way. any help I can get is very ap.