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Leaking Carb 1989 Mercury 60hp

D

Dellquay

New member
Hi, this is my first post as I always try to get stuck in myself and come on here a lot to find answers but I'm a bit stuck on this one.

I've got a 1989 Merc 60hp 2 stroke and long story short she suddenly cut out on me on the way home yesterday. I couldn't get her started again and was drifting dangerously so I deployed the Aux motor and got home safe.

On inspection this morning I noticed fuel leaking from the top carb when cranked or primed. I took the airbox cover off and narrowed it down to the throat of the carb and specifically coming from a small brass fitting in the attached picture. There doesn't seem to be any reference in the manual to this piece and subsequently no troubleshooting tips related to it.

If someone could identify this part and possible cause of the symptom it would be much appreciated.
 

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That'll be my plan for tomorrow. Is the brass fitting a vent? I'm also having a hard time finding the procedure for removing the air box to get to the carbs. There seems to be a lot in the way like solenoids and wiring, does this all come away with the airbox or does it all need to come off?
 
Yup. A dog to work on.

Jeff

PS: After rebuilding that carb, but before reinstalling it, clamp it in a vise, hook the tank to it, and pump up the fuel pressure hard as you can. If it still floods, try lowering the float level 1/16 " at a time until it stops.
 
Just wanted to say thanks to Racerone and Jeff for freely giving sound advice on the issues I was experiencing with my outboard. I was having fuelling issues and kept bogging down until it eventually ran like a bad of spanners and packed up out at sea. In the end I purchased carb rebuild kits, had the carbs ultrasonically cleaned, rebuilt fuel pump, new fuel connectors and hoses, new fuel filters, new plugs and took the time to carry out a link and sync which was easier than I thought it would be and it's all made a huge difference. I was out on the water today making final adjustments and when finished I took her to WOT at 5600rpm and 33knots on my 17ft Waverider fishing boat. She's up on plane much sooner than before and just sings at WOT so couldn't be happier and all for around £250 in parts and piece of mind that the fuel system components will be sound for years to come.
 
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