merc 50 hp stalling at low rpm?

[umtnman]

hello. I have a 2005 merc. 50 hp 2 stroke that is stalling out at low rpm. i have to pump the primmer bulb to re start. ive replaced the primmer bulb which did not fix the problem. Anyone have any other ideas? ser # is 50ELPTO. Thanks

 

[umtnman]

Any ideas?

 

[danalex]

you have a fuel problem. Either you have a leak in a fuel line before the fuel pump or your fuel pump is not working, has a broken diaphragm. When you pump it up without starting the engine, hold pressure on the bulb after it gets to max firm. Does it leak down? That is either a float leaking, which is not the problem you are reporting, or a leaky fuel line. If the bulb stays firm, I'd recommend you get a kit and replace the fuel pump diaphragm.

 

[umtnman]

Is the replacement of the diaphragm easy straight forward to change? I've changed one on a early 80's merc. 7.5 horse. Thank You

 

[Twitches]

Do you have the gas tank vent open?

 

[jimmbo]

hello. I have a 2005 merc. 50 hp 2 stroke that is stalling out at low rpm. i have to pump the primmer bulb to re start. ive replaced the primmer bulb which did not fix the problem. Anyone have any other ideas? ser # is 50ELPTO. Thanks

Does it run fine at higher rpm? if so, you probably have dirt/gum/varnish in one or more of the carbs

 

[umtnman]

runs fine at higher rpm. Will idle for a min or so then it dies.

 

[jimmbo]

Have you tried adjusting the idle mixture screws? And, what is the idle speed in gear?