Mercury 25hp engine dies

PSHAFT

Recruit
Joined
Mar 18, 2007
Messages
3
I have a 2002 Mercury 25hp remote start motor. Engine will not start unless I pull out the manual primer knob located on the outboard. Then the engine will start and will run until I push the primer knob back in. The engine will run for 15-20 seconds then dies. I have cleaned out fuel system, repalced fuel, replaced spark plugs, sprayed carb with carb cleaner. Does anyone have any ideas for me on what the problem may be? I'm baffled!
 

ddennis

Petty Officer 1st Class
Joined
Aug 15, 2006
Messages
351
Re: Mercury 25hp engine dies

rebuild the carbs....do you have a service manual?
 

Plainsman

Rear Admiral
Joined
Apr 2, 2006
Messages
4,062
Re: Mercury 25hp engine dies

If it stays running while you squeeze the primer bulb, could be the fuel pump needs a rebuild.
 

PSHAFT

Recruit
Joined
Mar 18, 2007
Messages
3
Re: Mercury 25hp engine dies

ddennis said:
rebuild the carbs....do you have a service manual?


No, don't have a service manual. Carb was serviced about a year ago, carb kit installed by dealer. Does the carb need to be serviced that often? It hasn't had that many hours on it since serviced.
 
Top