Moe,
I agree that Don's ballast tunnel seems closer to CB trunk than on my boat. Guess that means one MIGHT get even more than his 16 gals. Can't really tell, but it seems maybe my tunnel is a little taller than Don's, too.
INSTALLATION NOTES for IGLOO MaxCold-70 COOLER
I installed a 1x2 ledger running parallel to the CB trunk. It rests on the ballast tank forward ... and rests on & is screwed to a 2" mini-ledger that's bolted to the dinette seat's aft vertical (the only ledger fixations). I think I just had to level the ledger to the forward ballast tank, and everything else ended up square ... amazing!
Then I cut a piece of 3/4" shelving to just fit from the ledger, crossing the ballast tunnel to barely rest outboard on the hull. Shelf edges are chamferred & corners radiused, of course, w/two screws down into the ledger. The cooler rides atop this shelf. Since the cooler fully fills the hatch opening, seems that it might contact the watertank's two elbows, depressing them slightly.
Don't yet have any cleats on the shelf to fix the cooler's position. It can slide four inches in every direction before striking a bulkhead, so it needs some study vs. those hoses. Scooting is good because I scoot it fore/aft to operate the lid, and scoot it beamwise to lift or drop the handles (see pix). This season though, I want to half-moon the hatch at each handle, and cleat the cooler to limit the beamwise movement. Undecided yet on the fore/aft scoot, but a half-moon at the center-rear hatch might obviate that too. Up near the window, I added a patch of velcro on the liner, and a mating fuzzy strap holds the hatch cover vertical, as shown. (Click for full size image).
My bilge has always been dry, but I'd have preferred something other than wood shelving. Seems the ideal material would be an eggcrate panel of some composite ... guessing about 12" by 40" but must remain one inch thick, or less. The picture reveals how close the cooler is to the hatch height. The blue handles illustrate that the cooler proper is less than 3" below the hatch, just enough for the lid to fit underneath the hatch cover.
Anyone have an idea for a non-wood cooler shelf?
