Re: 1967 Mercury Merc 60 6hp Sneezing and stalling

[20mercman]

Sounds like lean fuel mixture to me. Have you gone through the carburetor? A good cleaning is usually in order when bringing a motor back into service if it hasn’t seen regular use. Another place that is common for vacuum leaks can be by the fuel pump. Some of these had the pumps right on the carburetor, others had the pump bolted to the side of the block for the vacuum pulse. There can be a vacuum leak at these. Also, these pumps are not very strong. If you are running in a drum, and have the fuel tank on the floor, that 4′ of head that the fuel pump has to overcome is sometimes too much if the pump is not in perfect condition. Place the fuel tank at about the same level as the power head, or at least like it would be in a boat to see if that makes any difference.

These 60’s are wonderful little motors. She should idle like a Swiss watch.

Steve