Outboard Stalls at full throttle

[Yellow Dog]

I have a 2001 90 hp Merc and it trolls great and runs great at 1/2 throttle.

When I go to full throttle, it bogs down--like it's starved for gas. When I squeeze the ball, it goes again for 30 seconds, then the same bog down.

What's up?

[jcb42]

how old are the fuel lines? i think they can gradually break down get weak over time, when you're pulling alot of fuel(full throttle) they may be collapsing and inhibiting flow. Just an initial thought.

[Surface Tension]

Your starving for gas.

Start with the fuel lines and primer bulb..

Fuel filter.

Fuel pump.

Carb

[fishgutz77]

You maybe pulling air somewhere as well check all your gaskets as well.

[fivebucks]

I've had that problem in the past and a new gas line and bulb solved the problem. When you are running the motor your bulb should not go soft so I would think that would be a good place to start.

[marine_man]

If it's not the fuel line / primer bulb follow Surface Tension's order listed above - fuel pump might be next.

If you hit the choke when the motor wants to bog out does the motor pick up?

Does the fuel bulb get soft, or is it firm and squeezing it picks it up?

marine_man