Leaky windows
I had the same problen with my '78 mac 25. I totally removed the windows from the boat. Then disassemble the window completely. At this point, I had to determine if I wanted to replace the plexy glass. I choose not to. I wish now that I would have. Once I had the windows disassemble I gave them a really good cleaning. It took a lot, b/c they were very dirty. I removed all the old caulk, w/ caulk remover. Next, I reassembled the windows. I used Marine grade Silcone to seal the the edges. Here's the TRICK. Out line the plexy glass with some masking tape. This will give yor caulk lines straight edges. (Once you take things apart, you better understand what I am talking about, This same trick can be used when installing the windows back into the boat) Let the caulk start to dry, but before it gets hard pull the tape up very carefully. This will give you a professional looking result.If you have any more question email me at Joel_Jorgensen@excite.com