2001 25 HP Mercury

[DADAKOTA]

My 25 HP starts reliably every time I back it off the trailer. It runs well. After running down the lake, shutting it off, and fishing for 5 or 10 minutes it does not want to start. I hit the starter and it barely stays running until I advance the throttle then she is good to go. Sometimes it conks out before I can get the throttle advanced. If I fish for 30 minutes or more after shutting it off, and hit the starter it fires right up and runs well. I am confused. Tank and hose are brand new. Once it is started it seems to idle just fine. Any ideas?

 

[achris]

Re: 2001 25 HP Mercury

It may be time for a carb remove, strip, clean and refit...

Chris.............

 

[DADAKOTA]

Re: 2001 25 HP Mercury

How tough a job is that?

 

[achris]

Re: 2001 25 HP Mercury

If you have the service manual, it's real easy... If you do them all the time, it's real easy... If you have never done it before and try it without the service manual... you may have problems... Get the manual..

Chris.........

 

[DADAKOTA]

Re: 2001 25 HP Mercury

I have the manual, but have never done a carb job.

 

[achris]

Re: 2001 25 HP Mercury

Carbs aren't difficult, just pay attention to cleanliness. Use a carb cleaner and dry compressed air... Not those farts-in-a-can you buy from electronics shops either.

Good luck,

Chris...........

 

[ufm82]

Re: 2001 25 HP Mercury

While the issue points toward a carb cleaning, I would look at an idle speed adjustment prior to pulling the carbs. I don't normally say that to people with this issue but the fact that it dies when hot but seems to do OK cold or cool tells me you may just have an idle speed issue. I'll assume you have no tach? You may simply try bumping the idle speed up a touch first. If that doesn't help, a carb job may be in the works.

UFM82