Re: 1987 Johnson 9.9 upper crank seal

[billw]

The upper engine mounts go bad on those quite a bit. When they do, they could leak exhaust around the mounts. I seem to remember that the cowl air intake is under the carb, just above the swivel bracket. If all the stars are in alignment, you could be sucking exhaust from the mounts, in through the bottom cowl….? Grab hold of the installed engine cover and try to move it fore and aft, while it’s on a rack, boat, etc. It shouldn’t move very much. Too much play means bad upper mounts.

Long live American manufacturing!