I started having problems about a month ago with a 1992 40hp mariner. Had a constant alarm problem. Mechanic said bad alarm. No overheat. Since then the motor won't allow more throttle underway. It seems to bog down. The first time it did this I cleaned the plugs ,the carb. bowl and the oil float and for a couple trips on the lake it ran better than it ever did. 
Alas the victory was short lived because its doing the same thing again.The wife is ready to tie an anchor to my butt and toss me overboard if I don't get it fixed soon.I tried the seafoam too and that didn't seem to help. Any suggestions??? Could it be an electrical switch or something that is stopping acceleration?
Alas the victory was short lived because its doing the same thing again.The wife is ready to tie an anchor to my butt and toss me overboard if I don't get it fixed soon.I tried the seafoam too and that didn't seem to help. Any suggestions??? Could it be an electrical switch or something that is stopping acceleration?