The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.
Center the mast fore and aft above the compression post, or a bit fwd if needed, to get the fwd bolts to end up in the head compartment without going straight into the post or bulkhead.
On my 1979 boat, the aft bolts were originally lag screws into the deck about above the aft corners of the compression post. After I replaced them with through-bolts, I had to chisel notches in the aft corners of the post for the nuts and washers.
Regarding your photos, 12 megapixel images, twice the width and three times the height of a typical modern computer monitor, are not as helpful as you might wish.
Try turning down the resolution in your camera, or crop & resize with Ms Paint or whatever graphics editor you've got on hand, before uploading.
There's a way to link a thumbnail, or at least small, copy of your photos to higher resolution versions on whatever image server you're using, like this (click to enlarge):
Here's another suggestion for locating the proper placement of the tabernacle. Since you're OK with fiberglass repair, drill a small hole down through the cabintop somewhat forward of where you expect to find the compression post. That gives you a reference point to measure off to the compression post, and when you're done just fill it back in.
And, concurring with Leon, please reduce the resolution of those images and re-post them.
Oh, and I'm curious about that tabernacle; my 1980 has the sheetmetal bracket that I thought was standard, but I've never seen one on a Catalina 25 like the one you've got.
The trouble with a destination - any destination, really - is that it interrupts The Journey.
Lee Panza SR/SK #2134 San Francisco Bay (Brisbane, CA)
Well I think I got it within an 1/8" of where it was, so all in all I'm happy with that. I used #8 1-1/2" SS wood screws into the fiber glass. In hindsight I would've liked to use a through bolt as mentioned earlier in this thread, but mainly for my own piece of mind as it is more than adequate. It was what I had available at the time as Covid still has stores partially closed here, and scheduled launch day (D-Day June 6th) was creeping up fast, and I wasn't about to miss it!
Oh and thanks for the help with the HTML images... It's been a while since I had to remember that stuff! I was too eager to post with larger than life photos!
The mast base you have is quite different than on my 1980. You may want to check with Catalina Direct to see what they have for the C-25 to confirm yours is correct -- unless you have a mast from a different boat. Yours looks more like what the Catalina 27 used or what Pearson used.
Peter Bigelow C-25 TR/FK #2092 Limerick Rowayton, Ct Port Captain: Rowayton/Norwalk/Darien CT
Peter, It could be that his boat is a 78 but I also agree that my base doesn't look like his. My base doesn't have the oval socket that his has.
Honestly, I'm not sure. It is what came with the boat when I bought it. The deck plate portion doesn't really look OEM, however the mast (oval socket) portion does. It is an earlier boat and the mast (as far as I can tell) is a standard rig from a C25...
All this is possible. Since I had sailbags in my boat from a C&C 27 I wondered if perhaps my mast is a from a donor boat... makes me wonder what kind of damage is hiding from the previous owner. The best example I could find of a C&C27 mast base is here http://www.cc27association.com/photos/mastbase.jpg
Notice: The advice given on this site is based upon individual or quoted experience, yours may differ. The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.