1998 Mercury 9.9 (2-stroke) wont stay running..

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Swinerton

Cadet
Joined
Jul 24, 2012
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The motor was just serviced by the previous owner.

I had the motor out on another lake just a week ago and it was fine. We took it out yesterday, and once warmed up it would die out.

It's definitely a fuel delivery issue. It's not the gas, and it's not the fuel line. Primer bulb stays full and pressurized.

Now......If I pull out and push in the primer/choke button, I can keep it running.

Would this be a fuel pump diaphragm issue??? Since pushing on the little blue button on the fuel pump allows for manually injecting gas into the carbs fuel circuit, and it stays running. Like the motor doesn't keep the fuel pump working on its own.
 

saylor4202

Recruit
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May 7, 2013
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1
Did u fix the motor? I have the exact same problem. Fuel pump rebuild? Thanks for the help
 
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