To catch up on this story, I dove under the boat last weekend, and found that the bottom was a total mess.  So much for Interlux Micron Extra preventing growth. Lots of slime and lots of barnacles, especially on the rear third of the hull.  The prop and shaft were also a mess despite the Pettit zinc spray I put on.  I am sure that the boat sitting at the mooring for several week stretches due to travel did not help, but I was not expecting it to be that bad.  I used my Dri-Diver from a dinghy and that seemed to do a pretty good job of taking much of the crud off the bottom. I did some scraping of the prop and shaft but did not have the right tools for the job, so that will be next weekend's job (drywall scraper has been recommended).  After the cleaning, the engine ran somewhat smoother and I was able to get to higher speed .  There was still some black smoke if I tried to bring the revs up, but not as much as before.  I will report back when I have the prop and shaft clean, but I am hoping that will solve the problem.  Dave

On Jul 28, 2013, at 8:19 PM, David Knecht <davidakne...@gmail.com> wrote:

I like the idea of a line wrap or Maxprop that is not folding correctly. THat will be my first target when I get in the water. Seems more likely than fouled bottom, but we shall see.  Dave

On Jul 28, 2013, at 7:48 PM, "Gary Nylander" <gnylan...@atlanticbb.net> wrote:

When I went to pick up a donated boat for our local Maritime Museum, I had a similar situation. Engine ran OK, but no go. Backed out of the slip - very slow - put in forward - about 2000 rpm, one knot! Black smoke means motor is laboring.
 
Moved it (slowly) over to the travel lift - they cleaned the bottom and prop - no problem afterward.
 
Gary
St. Michaels MD


David Knecht
Aries
1990 C&C 34+
New London, CT


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