25 hp Mariner - Not starting, no fuel reaching the carb.

2nr Guy

Cadet
Joined
May 6, 2011
Messages
6
Hey there, I'm a newbie to this outboard stuff. I just bought a 14ft aluminum boat with a 1987 25 hp Mariner tiller (2 stroke, manual start). I have some problem with starting this outboard. I took the boat out on the water to test it out. I flip the switch to run, squeeze the primer bulb (until it got hard), and pull the choke (in & out 3-5 times) and left the choke out. I pull the starting rope 5-6 time, and no start (couple attempts). I replace the spark plugs and does have a strong sparks. I spray some 50:1 fuel in the carb, and pull the starting rope and the engine started for couple seconds then shut off (will NOT stay running). If I constantly spray fuel in the carb the engine will stay running until I stop spraying fuel in the carb. My question is, 1. is there a right procedure to start these outboard engine? 2. fuel pump or carb problems??? I don't want to bring it in the shop if there was something simple that I didn't do or something I did wrong to get it started and stay running. Please help, Thanks...
 

Randy J

Petty Officer 2nd Class
Joined
Oct 24, 2009
Messages
170
Re: 25 hp Mariner - Not starting, no fuel reaching the carb.

just a guess have the gas tank vent open????
 

2nr Guy

Cadet
Joined
May 6, 2011
Messages
6
Re: 25 hp Mariner - Not starting, no fuel reaching the carb.

I forgot to mention that part, the fuel tank is vented open. Thanks
 

Mi duckdown

Commander
Joined
Apr 14, 2007
Messages
2,575
Re: 25 hp Mariner - Not starting, no fuel reaching the carb.

If it where mine. i would rebuild the carb and fuel pump.
clean and get a gasket kit for both. .02
 

windy5849

Petty Officer 1st Class
Joined
Aug 12, 2010
Messages
237
Re: 25 hp Mariner - Not starting, no fuel reaching the carb.

I have a 1990 Merc 25hp and I turn the choke knob clockwise to set it for fast idle before pushing it in and out to prime.As the engine warms up,turn the choke knob counter clockwise to return to normal idle speed.Hope this helps.
 

2nr Guy

Cadet
Joined
May 6, 2011
Messages
6
Re: 25 hp Mariner - Not starting, no fuel reaching the carb.

mi - yeap, i'm gonna have to go that route, since i'm gonna be keeping it for awhile.
windy - i'm try your way in the morning, i'll update the results.

-Thanks
 

Mi duckdown

Commander
Joined
Apr 14, 2007
Messages
2,575
Re: 25 hp Mariner - Not starting, no fuel reaching the carb.

Guy.
don't forget to change the water pump impellar.
 

2nr Guy

Cadet
Joined
May 6, 2011
Messages
6
Re: 25 hp Mariner - Not starting, no fuel reaching the carb.

Mi - will do, thanks again...
 
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