04 25hp mercury outboard problems...help!!

meier247

Cadet
Joined
Apr 13, 2010
Messages
20
Ok so i took my boat out for a spin today and i had the motor wide open and let off and it starting dogging out and spitting and sputtering and what not...and id crack it back open and it would run fine...and i shut it off and i couldnt get it back started got home and hooked it up on a water hose and held the throttle wide open and it would start but as soon as i let the trottle down it will die and starting it with no trottle as i have to do all the time because you cant start it in gear it will not even crack open until i take the hood off and hold the trottle open then it will start eventually and as soon as i get it running and hook the gas line back up it dogs out and dies.but runs good when i take he fuel line back off again??...and its leaking a bunch of fuel mixture out down by the prop? is something stuck or whats going on anyone have any helpful ideas thanks
 

huntin dawg

Petty Officer 2nd Class
Joined
Nov 12, 2009
Messages
197
Re: 04 25hp mercury outboard problems...help!!

Check the carb float. Sounds like the valve is stuck open. Could be debris, bad needle or bad seat.

HD
 

maggicman

Recruit
Joined
Dec 14, 2009
Messages
2
Re: 04 25hp mercury outboard problems...help!!

Is your 25 a 4 stroke or a 2 stroke? In any case it sounds like what happened to my "98" 4 stroke . It just would not idle but run great at wide open. I bought a carb kit from my Merc dealer ( $64.00) Took off the carb and gave it a good cleaning and installed the kit. I also checked the gas filter and replaced the spark plugs. Runs like a charm now.
 

meier247

Cadet
Joined
Apr 13, 2010
Messages
20
Re: 04 25hp mercury outboard problems...help!!

2 stroke...i had a guy install a new carb kit last year and it ran excellent after that and he cleaned it all out...i only put pry 10 hours since then..
 
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