Re: 1991 Bayliner stringer, transom, deck install
The gap should have been temporary, the new wooden stringer should not be installed directly onto the hull, leave a small 1/4" gap under them. This gap is then filled w/ PB (peanut butter like consistency poly resin & fillers (NOT TALC, it absorbs water, use cabosil, chopped &/or milled fibers, which fillers & combinations of fillers depend on the job at hand & the strength needed and ease of sanding needed) and a small rounded cove is created along the edge of the stringer to leave a rounded surface to make tabbing the stringer to the hull w/ fiberglass CSM (chopped strand mat) much easier.
Without the 1/4" gap, the wood stringer would be in contact w/ the hull, and underway or while on the trailer, those hard surface wooden stringers create a hard edge that is not flexible. The fiberglass hull will flex, if only to a small degree, and over time those flexing cycles will generate stress cracks along the outside of the hull, opposite the stringer. The PB under the stringer & made into a cove, along w/ the fiberglass tabbing, all help spread that load across a much larger area, reducing the hard edges & providing more strength.
Look thru the hull extension thread in oops' signature line &/or the link he posted earlier. It has a handy index on pg1 that will help you get a better idea of the how & why. Look for friscoboaters YouTube channel & both his threads @iBoats, they have tons of helpful info too, as well as videos that help make sense of what your reading/learning. WoodOnGlass has some really great layouts & layup schedules for stringers, transom & deck work on fiberglass boats in his signature line too.
Spend some time reading thru oops' & other threads, although no fun whatsever, the demo phase is easy, just be sure to keep & maintain lots of photos & measurements for the put back. The put back is all together different, and although not particularly hard, it requires a much firmer idea of how, where & why each step is done, and done in an orderly fashion. Otherwise poor decisions now, lead to less then satisfactory outcomes & may require rework or be completely redone again sooner then later....IMHO...
Hope your stay in dry dock is short, and she's back in the water soon.....
I guess your saying the stringer is part of the chine. Running along the outer edge of the hull where the angle of the V flattens out and changes pitch.
