Newbies first project...transom stringers and floor!

[Peteypablo25]

Re: Newbies first project...transom stringers and floor!

I actually cut the splashwell itself out. It will have to be partially rebuilt due to the irresponsible(for lack of a better word) way that I cut it so thats not really an issue. As foe the pb, I used fumed silica and a crapload of milled fiber but no mat. I did lay 1 layer of mat on skin before adding pb but no chopped mat in the pb itself. I was told that milled fiber is strong. Is that true? It was in powder form so I was skeptical myself. The motor is a 1993 115 johnson 2 stroke. Id like to add my 3/4 inch. Especially because its a bayliner 3 piece transom. if not the 3/4 maybe at least a 1/2". What about building it up with 1708? Would that be strong? I know its good for tabbing but not sure about its structural integrity in that thickness under That type of load

 

[jigngrub]

Re: Newbies first project...transom stringers and floor!

Chisel and grind that crap off and do it right this time!!!



Just kidding.:laugh:

As JBC mentioned, the cap/splashwell where the motor attaches to the boat will decide how thick you can make this transom piece. Also the opening on the "jaws" of your motor that sets down over the transom. You need to measure both of these and plan around them.




Get these dimensions and let us know what they are.

For future reference we use full 2x4s and 3/8" allthread rod for bracing and clamping transoms... not a paint stir paddle you'd spank your children with.

Edited:

You can still use another piece of 3/4" ply but you may need to trim the thickness of the top of it down to fit in your transom cap. I'll explain how to do that if you need to trim it.

 

[Woodonglass]

Re: Newbies first project...transom stringers and floor!

If the original transom was indeed 2" thick, then, I'd ensure that the inner surface of this new transom was parallel with the outer surface of the transom and grind down any high spots util it was. I would then PB a layer of 1/2" plywood to the existing transom and finish her off with 2 layers of 1708 fabric. That would ensure that the transom would support your engine.

 

[Peteypablo25]

Re: Newbies first project...transom stringers and floor!

Chisel and grind that crap off and do it right this time!!!

That was my original though haha. Kind of pissed me off all that preparation and it didn't come out the way I wanted it to. It is what it is though. It seems really solid so I think I can work with it. I was thinking that I could use a 3/4" and cut the first couple inches off tho leave room for the hangers like you said Jig....Was also thinking of the 1/2" then 1708 like you said WOG. I guess Ill get some dimensions and get back to you. Id like to be able to lay as much 1708 as I need to just so I feel comfortable with the strength. I dont know why I bought one of the ONLY boats with this type of transom. One solid piece would feel so much better.
As far as the cap goes Im going to have to rebuild that due to the way I cut my entire motor well off so I dont think that will be an issue.

When I look at my Wellcraft the hooks on that Johnson are sitting well above the transom. Is this the norm? or is it because the Wellcraft has a low transom height? I didnt know if those hooks would end up going over the top lip of transom on the bayliner or if they be above it like the wellcraft....OK gonna get to work. Thanks for the helpful (and comical) input.

 

[Woodonglass]

Re: Newbies first project...transom stringers and floor!

Your transom design is not that uncommon. The center piece is the most critical since it carries the load. As long as it's adhered well to the outer skin and then the full layers of 1708 extend out onto the wings and sides/bottom of the hull 8-10" it will be fine. Don't worry yourself into a "Tither" over this. You are doing fine and it WILL be fine. Just keep doing what you're doing and it you'll have a boat that will be seaworthy and sound.