Ok, so i bought a 1982 80 hp mercury outboard. I took it to a great boat guy, hes a retired engineer whos been working on boats 20 plus yrs. So he put a new control switch, trigger, rewired the harnesses, rebuilt carbs, new fuel pump. He ran compression tests and electrical output and all is good. I tore out all the old fuel lines and put new lines, tanks, and filter. Also new plugs. The problem is that it runs great out of water. When i put it in gear it will run 5mph all day long. When i go past the threshhold it stalls and sputters and will cut off if i dont pull it back. Yesterday when i had it on the water, it ran like a champ for about two minutes about 35mph. I had to slow down and went to get on it again, same thing, 5mph or cut off. Ive been reading other posts but they hadnt had their carbs and all the work done. Im at a loss right now, he cant see the problem b/c he cant run it in water, he just sees it runs great infront of him. Maybe timing, i dont know, any ideas would be great, i just dont see how it runs like crap, 2min later wide open, 2min after that crap again. PLEASE HELP, this is driving me nuts, thanks.
