Mercury 40hp OC233028 issue

Lino

Seaman
Thread starter
Joined
Jun 11, 2008
Messages
51
The engine runs great for 15 minutes out on the water, they power output drops to about 50%, a few mechanics have not been able to figure out why.
Anyone have any ideas, fuel pump just rebuild, engine dynoed, carbs cleaned.
 

Lino

Seaman
Thread starter
Joined
Jun 11, 2008
Messages
51
How well vented is your fuel tank?

I was wandering the same thing, this is on my old boat and I have not experienced it myself.
Thanks for your input I will definitely ask him about that.
 

TyeeMan

Master Chief Petty Officer
Joined
Feb 27, 2006
Messages
849
Run the motor off a new/different/portable gas tank and see what happens.
 

Lino

Seaman
Thread starter
Joined
Jun 11, 2008
Messages
51
I told hi to take the gas cap off when engine loses power to see what happens, new gas tank will keep in mind
 
Top