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Dominick, Marine Mechanic
Category: Boat
Satisfied Customers: 1009
Experience:  25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified
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1986 3liter 2barrel merc carb won't maintain rpm over 2500,

Customer Question

1986 3liter 2barrel merc carb won't maintain rpm over 2500 , fuel flow 1pint in 30 seconds.can a power valve limit higher rpm?hd_hoover 42 @
Submitted: 1 year ago.
Category: Boat
Expert:  Tan replied 1 year ago.

Hello Henry. My name is Tan.

Power valve will not cause this problem.

This is more like a fuel starvation issue. Have you changed the fuel filters in the carburetor and the fuel pump? Have you tried running the engine on a different fuel source.

How are you measuring the fuel flow rate?

Are you measuring the fuel flow rate at 2500 rpms?

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