1985 75 hp Merc won't rev in water
by Jacalyn Margittay
(Door County, Wisconsin)
we just bought a 1985 75hp merc. we had the motor company where we bought it put it in the tank and all was well. we then took it to the water and started it. it runs about 1/4 throtle and then it dies out. we changed the plugs, back to the water and got the same result. we used new fuel. same thing. we checked the spark and the 2 lower were sparking but the 2 upper were not. we changed the coils. back to the water. same thing. we took it back to the motor company and they fixed a wire and put it in their tank and it ran fine. threw all the water out of their tank. we took it back to the water AGAIN and the same thing happened. anybody have any ideas?