On Mar 22, 9:05 pm, " wrote:
... I'm planning on taking the boat out in the morning anyway,
so I'll try and pay particular attention to the motor and report some
symptoms for you. ...

Alright, I took the family out for a cruise yesterday and did keep an
eye on the engines. I reduced the warm up period to about 10 minutes
and the batteries were fully charged when I left the dock. On the run
out of the harbor I set both throttles to about 2300 and for the first
5 minutes or so the stb eng would run up to just under the desired rpm
and then drop off 200 fairly slowly and then run back up. The full
cycle taking about 10 seconds. We set sail and sailed for a couple of
hours and then restarted the motors to anchor and throttle response
appeared normal. After a couple hours at anchor I motored home (about
4 miles). The engines appeared to run normally. Neither smokes at
WOT and both ran up to full rpms (though we were running with a
strongish tail wind). I know this isn't going to help my case as it
sure sounds like air in the fuel. Still, I'm pretty convinced that's
not it. I have spent a lot of time with the fuel system. The filters
are new. The day tank is above the engine. There doesn't appear to
be any water or growth in the fuel. But, I hope everyone who wants to
will feel free to tell me what they think the problem is. Fire
away!

-- Tom

PS. And thanks.