Motor Starved for fuel

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Eheltonone

Recruit
Joined
Jul 2, 2011
Messages
2
I'm a newby on this motor but I have a 25 hp Mercury out board that will start when I pump the fuel bulb. It then runs a few seconds and dies. I checked fuel filter it's clear. I changed fuel tanks with no help? Could it be the air filter?
 
C

CharlieB

Vice Admiral
Joined
Apr 10, 2007
Messages
5,617
Re: Motor Starved for fuel

Disconnect the fuel line at the carb and crank the motor, not to start it just to see if the fuel pump is squirting a strong stream.
 
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Eheltonone

Recruit
Joined
Jul 2, 2011
Messages
2
Re: Motor Starved for fuel

CharlieB said:
Disconnect the fuel line at the carb and crank the motor, not to start it just to see if the fuel pump is squirting a strong stream.
Click to expand...

I disconnected the fuel line and fuel pump seems to be putting out a strong stream. The motor starts with the choke out and runs a few seconds then revs up and dies.
 
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CharlieB

Vice Admiral
Joined
Apr 10, 2007
Messages
5,617
Re: Motor Starved for fuel

install a clear section of hose to the carb, fire the motor and watch for any air bubbles passing thru, indicating the pump sucking air into the line somewheree between the tank and the pump.
 
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