1974 23 SF rebuild

[captsuperfly]

Big milestone on my 23 SF rebuild. After all the grinding, glassing, grinding, overthinking etc, I’ve finally bedded the transom core and laid most of the inside skin.



Old transom was nice and rotten, so it came out easy.



Holes/keyholes filled



Four layers of 1708 with epoxy on outside skin to beef it up.



2.25 inches of coosa (one 1.5 inch, with ¾ piece glued with epoxy/cabosil mix)



Bedded in with Epoxy, cabosil, milled fiber mix.



One layer of 1708 followed by 4 layers of 1700 on inside. Going to let it cure and clean up some spillage and grime tracked in before one final layer of 1708, tabbed out 12 inches (I’m tabbed out 3,6,9,12).



Then onto the stringers. Going to raise the deck 2 inches.

The bubbles in the lay up for the outside skin are carriage bolts. The skin had a big bow in it after I removed the old core. The top half was much thinner than the bottom. You can see a large piece of 3/4 ply in back of the transom. I bolted thru before laying all that 1708. Cut the glass around the bolts and they popped out. Then I just patched those spots before bedding the core.

[captsuperfly]

More pics

[captsuperfly]

Inside layup after 1708 and two layers of 1700

[Kevo]

Looks great, keep it coming!

[captsuperfly]

Long summer of slow progress - but I've gotten the stringers raised and re-filled with 4lbs foam.

I added two Coosa stringers inboard of the factory stringers and raised them to deck height.

Replaced the wet fir center stringer with a 4" PVC half pipe (after running 3 layers of 1708 down the keel to replace what I ground out).

I filleted and re-tabbed the box stringers.

I built and tabbed in four bulkheads - two compartments for fuel tanks (62 gallons each) - one for a fish box behind the aft fuel tank and a bilge.

Dry fitted a keel stringer/knee in the bilge. I'm glassing that now and I'll tab it in this weekend. Lots of sanding, scrubbing and cleanup as I hit the home stretch on the structural stuff.

[Surfnski]

Looking good! Subscribed.

[deerfly]

ditto nice work, very clean fillets and transitions.

i just took possession of a 78 23cc yesterday that will need a rebuild from the stringers up too. I intend to install two 70 gal tanks and was wondering how you determined where to locate them. Did you use the CG formulas on this site or are they more or less occupying factory location of a single tank along the keel?

[captsuperfly]

Originally Posted by deerfly

ditto nice work, very clean fillets and transitions.

i just took possession of a 78 23cc yesterday that will need a rebuild from the stringers up too. I intend to install two 70 gal tanks and was wondering how you determined where to locate them. Did you use the CG formulas on this site or are they more or less occupying factory location of a single tank along the keel?

I did do a bunch of math and used the CG table on the site - but it's tough because I really didn't have all the given data from the original rig and never rode in the boat before taking it apart, so have no idea how it rode before.

Most say that, if you're adding a bracket, try pushing the tank as far forward as possible? I went from a single 100 gallon tank to twin 62 gallons, and the CG of the "tank assembly" is moved up around 18 inches - the front of the forward tank is about 24-25 inches up from the original tank.

[captsuperfly]

Tabbed in the knee. Temps are really cooling off at night so I'm going to start using heat lamps or something. Maybe an insulated tarp?

[Capt Chuck]

What was your reasoning for raising the deck?