For What Its Worth...
I too had difficulty this summer lifting the centerboard on my "new" '97 h26. When I pulled hard, the line would slide off the shiv at the base of the mast. I've now taken the boat out for the winter and had the local boatyard look at it. They tell me they found and solved the problem as follows: 1) where the CB line enters the deck (at the mast step), it was chafing on some metal sticking out slightly into the compression post hole in which the line goes down. This was filed smooth. (My CB line did show signs of chafing and you may want to check yours); 2) the sides of the shiv were worn and, apparently, the shiv was small for the line being used. This was replaced with a deeper groove shiv. Anyway, I won't know for sure that the problem is solved until next spring. They charged me $125 for the work and agreed that if these fixes didn't do the job that they would revisit it in the spring.One big concern I had initially was that the centerboard's gelcoat had failed and it had "swollen" from being in the water continually (I keep the boat at a marina). This proved not to be the case and I mention it only because I did find out it would be a warranty-covered item if it had occured.