My diver service is in complete agreement with me about this. The effect of minimizing the use of Shore Power is IMO the best way to reduce zinc erosion. I had thought about installing a galvanic isolator but having tried that on my earlier R-25 Classic with zero affect and having spent some $400 doing that, I decided not to repeat that wasted effort. They certainly did for a week not being on Shore Power. With good/new batteries I would think the batteries would hold their charge over a 2 week period. I think connecting Shore Power for 24 hrs each 2 weeks would provide even less zinc erosion, but never got around to doing this. This had a dramatic effect on the zinc erosion and diver service switched to replacing every 9 months. In researching this rapid erosion I adopted the following.Īs I'm just a few minutes from my slip, I connected shore power for 24 hrs each weekend just to keep batteries topped up. They did so after the first 90 days as the zincs were at 50%. When I had bottom paint applied before the boat was delivered to me in Aug 2017 I also had the lower section of the outboard covered with bottom paint to protect that portion of the engine that I presumed would sit in water when the engine was tilted up.Īt first my diver service estimated I would need to replace my zincs the engine's lower large transom bracket and trim tab's every 90 days. Ted Edmunds tedmunds4 Posts: 7 Joined: Mon 2:19 pm City: Annapolis State/Province: MD Ranger/Cutwater Model: C-242 C Vessel Name: Seaclusionįor my R27/OB with the Yamaha F300 engine that is kept in the water year round in salt water with the engine tilted up only the small bottom fin is left in the water. I plan to add the transom zinc myself and was wondering if any other 24ft Cutwater or Tugs have had similar issues? ![]() Cutwater recommends adding a transom zinc and possibly a galvanic isolator on my dime and the dealer agreed to come out in the spring to assess the voltage leaking situation at my dock. Apparently the 250 HP engines do not rest in the water, but we're told the 300 is heavier and doesn't lift totally out of the water even with little water in the tank or 1/2 full fuel. Me thinks there is electrical drain somewhere that grounds its way to the water through the engine. But, the 24C does not come with a transom zinc, as do all the other larger models. ![]() ![]() It seems when asking the dealer that I was told that we should change our zincs out every 90 days when left in. Has anyone else who may keep their boat in the water for the season plugged in experienced similar findings. Other boats with similar (Yamaha) outboards and some with stern drives located within 15-20 feet away whose engines also partially hang in the water show no corrosion or excessive zinc wear. We have not experienced any excessive zinc degradation on any past boats here and keep our boat plugged in for the battery charger and the fridge. We keep our new 24C docked in the water on Back Creek in Annapolis and noticed the front of the engine foot had extreme electrolysis gouging when it was pulled for the season.
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