I have a 1989 Mercury 45 HP. The fourth (bottom) cylinder was not having any sparks. I took the boat to a mechanic and he told me that the switchbox was bad. He replaced and tested it. All four cylinders had sparks. I took the boat to a lake test and it ran ok for five minutes and then it quit...
I have a 1989 mercury 45 hp, and I would like to know if someone could help me out with the carburetor floating adjustment. I rebuilt the carburetor and I cannot get it right. Thanks, Jr
