anti fouling paint for motors

[nippers]

I have a 225 hp Yamaha salt water series motor on a 22 ft Baystealth bay boat. I store the boat in my driveway and use it about five times a year. When I do use it I go to the Chesapeake or south Florida and leave in it the water for two weeks to a month. I have bottom painted the boat with a copper based Pettit Horizons Ablative type paint. This is working fine. However, I have left the motor unprotected. I am getting some barnacle buildup on the motor mount and attachments. I have read about PETTIT alumaspray for this purpose. Does anyone have any experience with methods of protecting the motor mount from fouling? In addition the U shaped anode remains in the water when I tilt the motor all the way up. The anode is also getting a lot of fouling. The Yamaha manual says not to paint the anode, but how can it be protected from fouling? I scrape the barnacles off the anode as best I can but never get all of them. Also how do you know when the anode needs to be completely replaced. Sorry about so many questions but I don't live near a good source of information.

[buddavid]

I have had good luck with Interlux Trilux, it is important to prime the surface of the lower unit before applying this paint. When you apply your bottom paint to the hull of the boat you should not paint regular bottom paint withing 1" of your outboard mounts. This 1" set back area should be painted with the Trilux as well. Otherwise the copper in your bottom paint will eat the aluminum of the motor. I replace annode's when they have lost half or more of their material. Also note that there are two types of annodes, fresh water and saltwater. Never paint over the anodes and just scrape them the best you can.