Zinc replacements
You can get zinc replacements for your engine by contacting a dealer for your type of motor. You can find many dealers on the internet. Just type in Westerbeke or Yanmar on a search engine. The prop shaft zinc can be easily found at a marine store like Boat US. They sell them under the name (Beneteau type) zinc. You can also call customer service at Beneteau USA and ask for the parts department. The number is 1-843-423-6459.