Newbies first project...transom stringers and floor!

[Peteypablo25]

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

Agreed on the west marine thing...can I do a 3 piece transom? A closer inspection Definitely revealed that the center goes straight across where the motor hangs but the 2 sides are at a definite angle. I dont see how I can bond a single piece of ply across those angles and have it laminate 100%

 

[Woodonglass]

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

Shoot a picture across the back of the boat so we can see the entire width of the transom from top to bottom. It's hard to understand what you're talking about without actually seeing it.

 

[Peteypablo25]

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

Working on that...gotta let the phone charge

 

[Peteypablo25]

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

 

[Peteypablo25]

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

 

[Peteypablo25]

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

 

[Peteypablo25]

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

Its hard to see but right on the edges of the bilge area it angles slightly. I took a side shot to try to show it. The second pic. You can see a shadowed area thats where it goes straight across. The only way I can think of is to either do a 3 piece transom or really thin sheets one at a time to try to bend it.

 

[Peteypablo25]

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

Soooo...ive done some more searching and found out that my boat 1985 bayliner 19 has a 3 piece transom. Anyone have any experience with this? Im kind of relieved actually because it will be easier ti clamp the pieces to the skin when curing. I just cant find any step by step info. If I need to do all 3 at once or how to tie them together structurally...things like that. Previous setup had 1.5" in center panel and 3/4" on each side. Do I glass the edges to install them butted against each other or is there a space.

 

[tpenfield]

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

The 'angled' transom may be why the fellow at West Marine suggested layering 1/4" plywood, as it would be an easy bend at the 2 angles connecting the 3 straight sections of the transom. You can probably do pretty much the same with 1/2" plywood and only need 2 or 3 layers. Maybe 2 layers full width and a 3rd layer in the center section. The extra 1/4" thickness on the outside sections won't matter much in a rebuild situation.

It will have to be laminated in the boat, so forget my comment about laminating it ahead of time and then installing it. I assume that you have checked out the rebuild threads on this forum that show various clamping techniques to secure the plywood to the transom wall as it sets up. You will want to clamp at the 2 angles in order to get the bend that you need. You probably want to do a test of the clamping process to see that the wood bends sufficiently, or if it needs some relief with a shallow cut.

As far as resin material, etc. . . US Composites is a favorite among many of the folks here Fiberglass , Epoxy , Composites, Carbon Fiber - U.S. Composites, Inc. . I have also used http://www.fiberglasssite.com with good success. US Composites seems to have more product offerings.

On the rebuild of my Formula 242, I used Vinyl Ester resin (VE) instead of polyester resin (PE). Epoxy resin is better for areas of adhesion, but using it in large quantities gets expensive. VE resin is a bit more cost than PE resin, but it has better adhesion and water resistance than PE resin. So, I consider it a good alternative to using epoxy in a rebuild situation. I also found that the VE resin had a longer cure time, which allowed more 'open' time to work. PE sets up pretty quickly.

A chemical respirator is a must . . . about $35 at hardware & home improvement stores.

 

[jigngrub]

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

Well Petey, we get to see what kind of mad carpentry skills you have now Bubba!
I can't believe someone actually designed a boat tail on a boat!

It's not really going to be that big of a deal as long as the 3 surfaces are flat, it'll be a bit of a pain if the 2 side pieces are on a radius... but still not that big of a deal.

If the 3 surfaces are flat I'd build it like this:

1. I'd do the center first and laminate (glue) the black and orange piece together and then bond and clamp it to the hull.

2. After the PB has cured I'd cut and fill in on the sides (green pieces), then bond and clamp them to the hull making sure to have a good bead of PB between the side and center piece too ooze out and bond the plywood pieces together.

3. After the PB on the side pieces has cured out tab and glass everything in.

Edited:

I'd like to add that I drew those in as 3/4" thick pieces and if the 3 surfaces are flat you shouldn't have any problems.

You can even double up on the side pieces if you want and make it 1-1/2" all the way accross and it would probably easier to tab and glass in.

 

[Peteypablo25]

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

Thats what I was thinking..the 3 seperate pieces glassed together. Do you think ill need to cut the edges of the side pieces at a slight angle?...or should I leave a small space in between to allow the pb to bond them. I plan on using poly resin for the pb if that changes anything. Man this boat sucks lol! Kinda second guessing whether I should even be doing this to an 85 bayliner. I really need to price this out before I purchase supplies. That 1708 im assuming isnt cheap. From what I remember reading I only need a layer of that I n all edges correct?

 

[jigngrub]

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

2 layers (layups) of 1708.

Price out your materials, then go down to a couple of boat dealerships and price new boats in the same size you have now. I think you'll see pretty quickly which route will be the cheapest.

That's a pretty nice boat and it'll be like new when you get done and give you many years of trouble free boating.

You can either cut the edges of the side pieces square and goop the PB into the crack of bevel them, I'm guessing it'll be close to 12.5* angle. The poly resin PB will be a good build.

 

[Peteypablo25]

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

 

[Peteypablo25]

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

 

[Peteypablo25]

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

 

[Peteypablo25]

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

Hey guys...I wanna thank everyone for their input. Its awesome to be able to tackle a project like this having very little previous knowledge of my own and I owe it to all of your input.

couple MORE questions.
I started grinding/sanding with a heavy grit sanding wheel. I noticed different shades of pink at different levels. Also noticed a spot that looks whitish. Its right above the wood grain in pics 1 and 2. Should I be sandind down past certain looking material? Also...there is a lip along the bottom edge where it meets the bilge area...should I grind this completely off and build vack up later or can I fill this with pb and jam the transom in there.

 

[jigngrub]

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

Your grinding looks good, grind back to mainly pink glass. It'll come out a bit mottled, but thats ok. Don't spen too much time or go too deep in a specific area. You can go back over any suspect areas when you get it all ground out.

I think the lip you're talking about is old PB that was under the bottom of the transom, grind it down flush with the hull.

 

[JASinIL2006]

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

I wondered about that when I started grinding my transom, too. The white stuff didn't look too good, so I knew it must be ground out.

In my boat, it was clear when I was grinding old peanut butter/thickened resin vs. the hull shell. When I saw fabric patterns in the glass I knew I had all the old PB out. (I decided I'd grind down to the hull and bulid it back up myself with fresh PB.that way I could be sure I was getting good adhesion between the hull and the transon core.)

I figured I was better off being a little thin rather than too thick.much easier to add thickness later then to try to remove it...

Jim

 

[Peteypablo25]

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

 

[Peteypablo25]

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

Hello again...so ive been busy (not with the boat) and just now got a chance to make some more "progress". I purchased a couple gallons of poly laminating resin....9 yards of 1708 and some other odds and ends. Started sanding the skin and found a weak looking area which I cut in to with the edge of the sanding wheel and found this void underneath. Im not sure if that is gelcoat in that void or if that is the original skin. If that is gelcoat...how should I handle this?

If it is the fiberglass skin then do I need to bring the rest of the skin down to that area to be level with it? Is that what I want to grind down to on the whole transom? I didnt think so because its quite deep but jot 100% sure.