1987 40 hp mercury on a 17 ft, bass tracker

[joneser96]

will only go 7 mph, bogs down at about half throttle, any ideas? It runs smooth going slower than about 7 mph.

 

[alldodge]

will only go 7 mph, bogs down at about half throttle, any ideas? It runs smooth going slower than about 7 mph.

:welcome: to iboats

Run a compression test and let us know

 

[bilge rat jim]

:welcome: to iboats

Run a compression test and let us know

-And test for spark on all cylinders. Use an inductive timing light so you can check for spark while the outboard is under load. (have a look at the condition of the plugs while you have them removed to do your compression test)