Structural integrity question for my fiberglass 1977 19'starcraft stinger

derek23

Cadet
Joined
Aug 1, 2011
Messages
10
Originally the boat had a lot of fiberglass housing/seating structure that was attached to the hull and transom with screws on the outside of the boat hidden by rubber molding,it was not glued etc to the transom.I have removed that as you can see in pic.

My question is to what degree,if any,did all the fiberglass structure/seat housing play a role in the structural integrity of the boat?

I'm thinking it doesnt considering it is just screwed into the boat walls from the outside,but who knows,i don't know physics or boat engineering principals.
i'm hoping what i am replacing the transom with is adequate for that heavy and powerful 175 johnson.i think i am probably underestimating my first transom rebuild...the transom needed replacing and has been.all the work i have done so far looks great,solid as a rock and following directions closely. it needs tabbing,stringers,floor and well walls to insert still.I used two 3/4" marine ply encased in csm and poly resin.once that dried i installed it with epoxy resin/cabosil putty.filleted it.thats where it stands.i have biaxial tabs precut(not sure if i'm doing 2 or 3 layers) to finish off the transom itself.then new stringers up to where the old ones are still strong(cut them back about 4 feet). new floor.and then new well walls fiberglassed in with the old original well on top(see pic).
I believe once i tie the transom in with the floor using new well walls that this will be better and stronger than original.
But that question still remains in the back of my head,will what i'm doing be safe?
thanks everyone for your input!



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ezmobee

Supreme Mariner
Joined
Mar 26, 2007
Messages
23,767
Re: Structural integrity question for my fiberglass 1977 19'starcraft stinger

I would agree with your assessment that it's not structural. Looks like you're doing a great job with your transom. If you were still concerned, you could always glass in a knee brace or two.
 

derek23

Cadet
Joined
Aug 1, 2011
Messages
10
Re: Structural integrity question for my fiberglass 1977 19'starcraft stinger

Thanks ezmobee! I will consider additional knee braces.
 

oops!

Supreme Mariner
Joined
Oct 18, 2007
Messages
12,932
Re: Structural integrity question for my fiberglass 1977 19'starcraft stinger

I would agree with your assessment that it's not structural. Looks like you're doing a great job with your transom. If you were still concerned, you could always glass in a knee brace or two.

yeppers.

great work.
 

Jon Sob

Master Chief Petty Officer
Joined
Jun 11, 2011
Messages
827
Re: Structural integrity question for my fiberglass 1977 19'starcraft stinger

Hi derek ..... Welcome to iboats. That transom looks good. Although I am not one of them .... there are a lot of experts here in this forum, like the two that have already posted here; so post plenty of photos and ask tons of questions and you will find some excellent advise. Great job and good luck with your project.
 
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