Mariner centerboard issue:
Bill, This an excerp from the site that I gave you. Don't let this scare you off buying this boat if it appeals to you. These are great little boats. I only bring it to your attention so that you can be aware of it, and know how to deal with it if by some remote chance you are ever confronted with the problem. I don't think that it's anything that can't be corrected by the average boat tinkerer. These boats aren't that heavy that you can't get them in a position to work on the board if you had to. Personally, I think that the Mariner is a great boat to have. Our club commodore owns a Bristol 27 that he uses quite a bit, but he and his wife would never part with their O'Day Mariner. Good Luck, Bill.Of the three the centerboard is the most difficult to maintain and repair. The first problem is to get access to the board. You must decide if you want to leave the board attached to the boat or remove it. In a previous article Paul Coward explained how to remove and reinstall the board. (But believe me, it comes out a lot easier than it goes in!) If you do not want to remove the board, you can put your boat on saw horses and dig a hole to allow the board to hang straight down. The most common maintenance problem with a centerboard is, over time, the board will rust and appears to flake apart. This is especially true for boats sailing in salt water. Large, flat scale can be removed by hitting the board with a hammer. Any repair work done to a board in this condition needs to have a solid metal surface as a starting point. Remove all the loose rust and flaking metal. Then , grind the surface with a grinding stone and high speed grinder. Equipment rental stores usually have what you need. Another approach is to sandblast the surface. You might be able to get it done at a local grave monument dealer or a car painting place like Maaco. In fact a place like Maaco might be willing to do both the surface preparation and the restoring. If you still want to repair it yourself, you must get raw metal exposed. Once exposed you need to coat it as soon as possible.