I have a 12ft aluminum boat with a 9.9 hp motor and its having problems?

Question

My boat has a 9.9hp motor bored out to a 15hp. Every time we've been out on the boat lately it seems to run fine until we try to get it goin full throttle it bogs down to where it is hardly moving.

We thought it was the fuel filter. But now im thinkin we have too much weight in the boat. Maybe it's not enough power to push 2 full grown men weighing around 200 each. But i really have no clue if thats it.

Whats wrong with it?

Answer 1

could be the carbs  water in them bowls  change them plugs you swab

Answer 2

Did the 9.9 -15 ever run good? As the carb would have to be change or rejeted>The 9.9 will rev up even if the boat won't go>

Answer 3

Air cleaner restricted,or possibly chock leaking extra fuel on acceleration.May need carburetor rebuild kit installed.