Dr.

I'll be yet another echo for checking out the carbs. First thing
I suggest is a visual check comparing the three. i.e. look at the
linkages to all three carbs and make sure all are connected. Check
your fuel line to the last carb for any kinks in the line. Next,
remove the airbox and apply the choke to verify the butterflies are
in sync and then apply throttle (without the engine running) to see
if those butterflies (deeper in the throat) are in sync. If all
appears well, then the next step is to tear into that carb. As
F330GT and Clams suggest, it really does sound to me like a carb
problem. Not that I have great experiences with outboards, but went
through a lot of aggravation trying to figure out what was wrong
with my '77 Johnson, which ended up being a bad carb.

I strongly suggest you try to get to the bottom of this before
taking that boat out again under any kind of load and rpm. I
can't help but think of that plug being too clean from NOT getting
gas rather than too much gas.

-JimL


Dr. Robert P. Richeson wrote:
removed