Mecrury 40 hp HELP!

F

floridacamper

Recruit
Joined
Oct 23, 2004
Messages
3
Please help. My boat has been in the shop on and off since July and still it is not fixed.<br />This what I have, it is a 1996 40 Mercury outboard and I have it on a pontoon boat. What happens is that it will run about 10 minutes then it want idle and it want take hardly any gas. They the boat mechanic went into the cards redid them gave me a tune up but he says it is sludge in the bottom of my gas tank. Well what happens he says is he cleans out the carbs and then after ten minutes or so of running the carbs get dirty again and it quits running. It should be noted that the carbs start leaking gas when this happens also. When I first took it to him it didn’t leak any gas just would die after 10 minutes or so running. What do you think? H did replace the fuel hose and bulb also. I emptied out the gas tank and rinse it out with gas cleaner before refilling it with good gas today and it did the same thing. HELP!
 
J

jimalsk

Petty Officer 2nd Class
Joined
Jun 19, 2004
Messages
188
Re: Mecrury 40 hp HELP!

The best I can suggest is to get a new fuel tank,hose and primer bulb. Also clean or replace all the fuel lines from the fuel pump to the carbs. It's just going to keep on picking up the crud at the bottom of the old tank and foul up every thing. The crud has gotten into the carb needles and seats so they aren't closing and just flooding things out. The carbs are going to have to be recleaned and rebuilt.Clean out the filter at the fuel pump. That motors fuel system needs a complete fieldday done to it.
 
F

floridacamper

Recruit
Joined
Oct 23, 2004
Messages
3
Re: Mecrury 40 hp HELP!

Thank you, would that make one of the carbs leak gas. I think your are right. Would this be something that I can do or do I need to have someone do this for me.
 
J

jimalsk

Petty Officer 2nd Class
Joined
Jun 19, 2004
Messages
188
Re: Mecrury 40 hp HELP!

Yes this would make one of the carbs leak. Gunk gets into the carb and the needle can not seat all the way,walla a leaking carb. You can do this your self it's up to you. Just take one carb apart at a time and back together before you do the next one. Do you have a manual? If not get one before you start. It will help when tearing things down plus you can learn a lot more by doing it yourself. Just go slow.
 
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