Quote:
Originally Posted by plusone876
. . . The port side has a little flexing in the same area but far less and no cracking anywhere.
My scuppers are about 1" or so below the water line, would you think the hermco bracket would add enough bouyancy in the rear to make it self bailing?
thanks,
|
My hull does not flex at all when you push in on sides till you get a couple feet forward of transom. If yours has any flex at all within a foot or so of the transom, that's disturbing!
As far as mod's go, I'd want to make sure the transom core is tabbed into the hull sides and bottom with about 3 layers of 1708 wrapped into hull around from front of core using epoxy or vinylester resin, and I'd attach some 45 degree knees from top of stringers to transom. Those vertical boxes on front of your transom don't do much unless they're attached to the stringers. A 45 degree brace between the stringers and transom would be a much more efficient use of materials (less weight), and would transfer the bending loads that motor/bracket are putting into the transom directly into the stringers, which on a '71 hull, consist of 4 massive 2" x ~8" U-shaped fiberglass beams that are installed in the hull about halfway through the layup and run the full length of the hull.
When previous owner removed those seat boxes and splashwell from back of boat, that took out a lot of torsional stiffness out of the back of the hull because there is a 1" x 4" "beam" oriented vertically and glassed to the inner liner at the front of the seat boxes running the full width of the hull. If you install a box beam across the top of the transom and glassed to the cap as Shine describes, tied to the floor with a bulkhead, that should more than compensate for the stiffness lost to the missing seats and splashwell. I'd make it wide enough to put a couple of small storage boxes or bait wells like the later model Tracker 20's have.
Regarding your scupper position relative to waterline with a Hermco bracket. there's no way to predict that unless we know what you currently have on there, so post some pictures of it! (How much setback do you have and what is submerged volume of the flotation tank, if any?) All I can tell you is that on my Seafari shown below with original deck and transom, the waterline sitting at the dock is just below the bootstripe, which is about 5.5" above the chine at the transom, measured vertically. Now the Seafari has more weight forward than most CC models, unless you've moved your console, batteries, gas tank, etc., so it's a little more tolerant of heavy motors. It's just barely self bailing at the dock, with the waterline just below deck level. I normally just leave the plugs in or use Forum Member Fellowship's "Vortex" PVC check valve invention (last pic below) when diving when the deck's gonna be wet anyway.