Mercury 40hp OC233028 issue

Lino

Seaman
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.
 

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
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
 
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