I have had similar problems accompanied by slower speed and even overheating issues when the buildup gets too much before I had her hauled last year.
I am working toward a wetsuit/hookah set up to dive the boat periodically to clean the prop and shaft. When she was hauled last July I cleaned the Maxprop and shaft and than applied the Petit spray paint product for transducers and props. I got a look at the prop at the end of the season via a friend's GoPro and it was still clean. No idea what it's like now, but I had get out a few weeks ago and the speed was about the same as at the end of the season. So, that's promising. As for your mystery, no idea. Tom B Typoed from my iPhone Tom Buscaglia Alera 1990 C&C 37+/40 Vashon Island WA O 206.463.9200 C 305.409.3660 Skype - thombusc > On May 7, 2017, at 12:38 PM, cnc-list-requ...@cnc-list.com wrote: > > Message: 6 > Date: Sun, 7 May 2017 15:28:48 -0400 > From: David Knecht <davidakne...@gmail.com> > To: CnC CnC discussion list <CnC-List@cnc-list.com> > Subject: Stus-List Prop "treatment" > Message-ID: <cc208223-f867-4d11-b1d4-d4eb05200...@gmail.com> > Content-Type: text/plain; charset="us-ascii" > > I have struggled with how to deal with my prop and have tried a number of > suggested solutions over the years. None have been totally satisfying in > terms of keeping it clean for the season. Propspeed last year was the best so > far. I was sanding yesterday and the guy with the boat next to me looks over > and says he has some advice. He said that many years ago, he sanded his prop > clean and put the boat in the water with no further treatment. He has not > touched it in the years since and claims he never gets barnacles. The prop > now has a very rough texture to the metal and looks nothing like brass. It > looks like it is coated with something and I have never seen anything like > it. Anyone know what is going on? Dave > > > Aries > 1990 C&C 34+ > New London, CT _______________________________________________ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated!