Mercury 40 Flooding

shoemaro

Cadet
Joined
May 10, 2007
Messages
22
I have a 79 Mercury 40. I have already installed a carb kit and fuel pump kit. I seem to be getting to much fuel pressure. The engine will run for a few minutes and then floods out. I have replaced the float. Once it runs for two minutes it will die and spit gas out the overflow thats connected to the float. Obviosly the float is not shutting off the fuel under idle. The seat seals and is setup correctly. It acts as if the float and the spring in the float is not strong enough to close seat/needle. Is there some sort of adjustment for the float? As far as I know it sits in the carb on a rod (no adjustment). I am stumped any ideas? Once it dies after two minutes it will not restart due to being flooded, just leaks gas
 

Laddies

Banned
Joined
Sep 10, 2004
Messages
12,218
Re: Mercury 40 Flooding

My first trough would be it needs a inlet needle if it shows flooding at the carb, if if is flooding but you don't think it's the carb it could be the fuel pump diaphragm
 
Top