gas leak on carb mercury 150 1981

wunderman

Seaman Apprentice
Joined
Jul 1, 2005
Messages
31
took boat out today it ran terrible no speed . when i got home i took cover off my carbs. 3 dual carbs , i squeezed primer bulb hard and i have gas pouring out the carb.the carb on top is okay the one on the bottom is okay but the carb in the middle pours gas out when i squeeze primer bulb. any ideas? thank you wunderman
 

Dukedog

Captain
Joined
Oct 6, 2009
Messages
3,445
Re: gas leak on carb mercury 150 1981

Dirty. Gaskets. Needles n seats. Floats. Not necessarilly (sp) in that order..............
 

wunderman

Seaman Apprentice
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Jul 1, 2005
Messages
31
Re: gas leak on carb mercury 150 1981

rebuilding carb is not something i want to take on. could i try a small gas can with seafoam or compressed air down gas line to bad carb or just regular carb cleaner
 

Dexta

Seaman
Joined
Aug 14, 2009
Messages
53
Re: gas leak on carb mercury 150 1981

Any way you could just take the bowl of the carb off? Lot of the engines I work on have just a single nut holding it on. If it's got a float needle I bet it's not seating properly because there's some some gunk lodged there.
 

Dukedog

Captain
Joined
Oct 6, 2009
Messages
3,445
Re: gas leak on carb mercury 150 1981

Take 'em off, clean and new gaskets. Once you get into 'em you will see they are tha simplest carb you have ever been into............
 

wunderman

Seaman Apprentice
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Jul 1, 2005
Messages
31
Re: gas leak on carb mercury 150 1981

if i rebuild carb am i just replacing gaskets
 

Wingedwheel

Lieutenant Junior Grade
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Jun 16, 2009
Messages
1,071
Re: gas leak on carb mercury 150 1981

Most of a rebuild kit is gaskets, but once you get the kit you will see that there is not that much to it. Just understand that some kits are made to fit several different carbs and you may have a couple of gaskets left over. Just so you know and don't go crazy trying to find the location of something you really don't have.
 

wunderman

Seaman Apprentice
Joined
Jul 1, 2005
Messages
31
Re: gas leak on carb mercury 150 1981

took my bad carb off today that was leaking gas so bad and i found a crack in one of the floats i no this is my problem , i went to sierra marine , iboats and they say my part is no longer available . any ideas? part# 7623 1981 mercury v6 150 1981.
 

Dexta

Seaman
Joined
Aug 14, 2009
Messages
53
Re: gas leak on carb mercury 150 1981

Can you repair it or make one?
 
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