NM update: My O’Day 34 has three 1” dia keel bolts.
Update: There are 5 total keel bolts on my 1983 O’Day 34. The three middle bolts are 1” dia. at 260 ft lbs torque.
The two fore and aft end bolts are 3/4” at 160 ft lbs torque.
You will need to find deep sockets to fit over the bolt and nut and a 1/2” x 10” extension.
Method to check if bolts had proper torque: 1) Mark a line along the bolt, nut, washer and floor plate. 2) Back off each nut, 3) Re-torque each nut to spec. 4) If the line on the nut stopped on the same line as before - the torque was correct. If the proper torque takes the nut past the marks, it was under torqued. Mine were all under torque, perhaps as much 10 degrees.. 5) You’ll need a 3/4” drive 300 ft lb torque wrench which I bought at Harbor Freight for $84 - looks very similar to my old 150 ft lb Sears torque wrench. 6) You’ll need a 10” long x 1/2 extension and 7) A strong young man to apply 260 ft lbs, and a couple blocks of wood to brace the torque wrench head against - actually worked. 8) Note, the FWD 3/4” bolt is hidden under the mast (there’s an access hole to the bolt partially covered by the mast step), but upon inspection, I found my 150 ft lb torque wrench actually had graduations beyond 160 ft lbs, and fit in the cavity. By using a 2x4 piece of wood, I was able to leverage the torque wrench handle end against the most FWD 1” bolt enough for a satisfying click at approx. 160 ft lbs.
We then ground down to gel coat a 4” wide band above the keel joint and about the same to bare steel, below. Then my yard epoxied all along the keel joint and wet laid up 3 layers of 4” fiberglass tape, 1st above, 2nd below and 3rd in the middle, and let it set up over night, which I followed by Interprotect 2000 and bottom paint. Upon lifting - no keel smile!
