Force By Mercury uses too much gas?

[wa state boater]

I have a 50 horse Force by Mercury outboard on my duck hunting boat . I ran it yesterday for about 30-40 minutes and used about 4-1/2 gallons of gas. This is not normal for this motor, I have had this motor since 1998. I am the only owner. Why is it using so much gas? Oh by the way it was opening day for duck hunting, got 7 birds, not bad!

 

[roscoe]

Re: Force By Mercury uses too much gas?

Welcome to iboats, Good job with the birds.

How did it run?
Did you have any trouble restarting the engine after it had been off for a few hours?

I would look to the fuel pump.

The diaphram inside the pump can tear or just wear out, helped along by todays "modern" gasoline.

When the diaphram leaks, it dumps fuel out the back side, into the block, and from there it is expelled.

Fuel pump rebuild kit is $13, takes about 30 minutes to install.