1993 Glastron OB Transom Restoration...

[krakatoa]

Glastron Transom Restoration...
Well!!!! Hello Guys, its me again around here, this time I have a new task to achieve regarding my 1993 SSV190 Glastron. Last one was on April 2012 with floor restoration. Ok, the transom has gone bad and its time for a resto. Im not an expert in Fiberglass but I will fix this for me and want to share pictures and experience with all the Big Guys Gurus on IBOATS so any comment, suggestion will be appreciated.

Taking a closer look to this SS plaque, its start to show "wood tears" coming from transom wood...

Never asked to former owner but its looks that this have been "repaired" sometime with a very poor job, take a look to that horrible foam coming from the top of the plaque. I bought this boat over 4 1/2 years now with no complaint with transom but that tears is something to worried about.

Lets take a look to the hull now.....

Ok, its not that bad, Peanut Butter and some 1708 in the inside and 1.5 outside will fix this, not a problem.

Top of the transom with outboard removed

Here is the tool I bought over the net for outboard removal, works great.

 

[krakatoa]

Re: 1993 Glastron OB Transom Restoration...

Once the OB removed its time to take a look behind the SS plate, ikts looks no good and water coming out, there is 2 3/4 panels with NO evidence of fiberglass or resin, WOW! Thats reallyh bad, that why I mentioned before that this transom had a very poor job.

Should I fill out this pockets with Peanut Butter? Nope, cut surroundinds cut cut cut!

Take a look to this pockets too. grind grind grind

CMON!!!!! Dolly Lady has gone too????

I will go shopping now for some materials, anyway next step is template or patter design. CYA SOON!

 

[krakatoa]

Re: 1993 Glastron OB Transom Restoration...

Big improvement today regarding the remotion of old wet wood, its comes out but not that easy, anyway I try my grinder in some area to reach the fb.

Take a look to the bottom area, its looks likes a fb pocket.

Outside upper transom area, looks to your left, here the wood was dry and in perfect condition, anyway have to go too, almost ready for grinding time. Need to cut more to the corners.

Here is the template for cut the transom, I will use 3/4 Dry Treated Panel. This template need some adjustment.

A few materials to getting started:
3yds of 1.5 CSM Mat
2yds of Combo Mat, its 1708 on one side and 1.5 on the other
1 Gallon of resin, almost sure I will need another one
1 Quart of Gelcoat

 

[krakatoa]

Re: 1993 Glastron OB Transom Restoration...

I tried to edit post # 3 but for some reason the system doesnt allow me to do that. Want to mention about the 1708 Biaxial in last picture, its looks more Woven cloth than 1708 as mentioned before this one have 2 layers toghether, in one side have 1.5 CSM and woven in the other side its a very strong material even without resin. Here in PR we call this one "Combi" as a short name of Combination Mat. Also instead of use Cabosil to make "Peanut Butter" I tried before "saw dust" in areas where strange is big factor to join fiberglass and hull, I used this technique when did the floor to join wood pannel with the hull then the 1708 over it. and believe me its dries very hard and not that bad to sand with a grinder or by hand. When the times comes in that step will add more pictures to show you what im talking about.

 

[Woodonglass]

Re: 1993 Glastron OB Transom Restoration...

Couple of things here. Your transom extends the full width of the boat. The "Piece" that you are going to replace will NOT, in my opinion, be adequate to make your boat safe and sound again. You need to remove and replace the entire transom, from one side of the hull to the other. Based on the pics you have provided, in order to do that you will need to either cut the splashwell or remove the cap to gain access to the transom. YOu will also need to remove a portion of the deck. When the transom is in this bad of condition it is usually an indication that the stringers need attention as well. The other issue is using sawdust to thicken your resin. Doing this makes it very easy for water to penetrate into the resin and this will weaken it and eventually make it fail. It is not a recommended method to use sawdust or any other water soluble material to make Peanut Butter. Your ingredients should ensure that the mixture is 100% waterproof. Just want you to be aware of these things.

 

[krakatoa]

Re: 1993 Glastron OB Transom Restoration...

Hello Woodonglass and thanks for reply in my thread, I will take care about the sawdust, you could be right here. I just did my floor last April the stringers are just fine and they`re fb over foam. No need to cap my hull or replace the entire transom, just remove all old wood. I will cut the entire top of the transom in order to place the new wood in place. The back of the transom and I mean the fiberglas and gelcoat is in very great shape, with all this wood already removed still solid, just take a look to the picture below.

 

[krakatoa]

Re: 1993 Glastron OB Transom Restoration...

Removing the OB

THE IVANS IN DA HOUSE

 

[Woodonglass]

Re: 1993 Glastron OB Transom Restoration...

I'm a bit confused that the template you've shown is not a template for a Full Transom. The transom needs to be full width and all one piece and tabbed to the hull sides and bottom. Trying to slip the wood into the existing inner and outer skin is not, in my opinon going to allow you to attach the transom securely.

 

[jbcurt00]

Re: 1993 Glastron OB Transom Restoration...

I'm not 100%, but it looks like the transom on this Glastron is kind of a set-back pod shape:

Given the 2 recessed areas on the port & starboard corners of the transom.

But based on these 2 pix:

It does look like & the text reads like, Karakatoa plans to slide the transom thru the cut out in the top of the transom (top pix of the 2) down into the opened 1/2 moon 'pocket' (bottom pix), which appears to be the plan rather then removing more of the splashwell....

And by:

Here is the template for cut the transom, I will use 3/4 Dry Treated Panel.

Do you mean well dried pressure treated plywood? If it's dry & didn't warp while it dried, I guess you could use it. But 'usually' pressure treated plywood isn't used...

 

[Woodonglass]

Re: 1993 Glastron OB Transom Restoration...

I DO see what JBC is alluding too! The transom does appear to be set back and not straight across. But again it does still need to be tabbed to the hull to gain the structural strength needed.

 

[jbcurt00]

Re: 1993 Glastron OB Transom Restoration...

Agreed, the slide into a pocket plan may not be structurally sound

 

[krakatoa]

Re: 1993 Glastron OB Transom Restoration...

As I mentioned before this pattern or template need some modifications, Actually this transom doesnt have wood side to side as you see in the pics, I dont know If its comes from factory that way.

In case I go side to side I have a problem cause this lady "b@tt" is like a half bubble to the outside, its not completed flat as an I/O

 

[krakatoa]

Re: 1993 Glastron OB Transom Restoration...

Hello JBC and thanks for stop by, well Its looks like guys think that I will just slip in the new transom and thats it, jajaja,no friends its not that easy, I know I have to tabbed the new one to the transom for structural strange, I will remove more splashwell for both sides, my intention is to reach up to the hull separation (see post #1 pics 3 &4) this happen because of engine power and weak transom. From that point to ahead iss like a half bubble. More work for today coming and pics too, so stay tuned.

 

[krakatoa]

Re: 1993 Glastron OB Transom Restoration...

I'm not 100%, but it looks like the transom on this Glastron is kind of a set-back pod shape:
And by:


Do you mean well dried pressure treated plywood? If it's dry & didn't warp while it dried, I guess you could use it. But 'usually' pressure treated plywood isn't used...

Well I cant use treated wood cause its wet, when glass the fb will not bond for too long because its wet. Thats why I will use treated wood dry in oven. Construction Plywood is strong but isnt that good. You have to remember that we boating in salt water, no lakes or rivers. More pictures coming up and guys!!!!! keep posting Im reading and listening....

 

[Woodonglass]

Re: 1993 Glastron OB Transom Restoration...

Your recent pics have clarified the situation a lot. Your transom appears to be only as your template shows it to be. You will need to gain access from the inside to tab and glass it to all the surrounding glass having first ground that glass down to fresh glass in order for the new glass to adhere properly. Sorry for the confusion on my part. Never seen this style of stern before so it was throwing me off a bit. As long as your tabbing and glassing is done well it should last a long time.

 

[krakatoa]

Re: 1993 Glastron OB Transom Restoration...

Ok here are step 3 completed, transom cleaned and ready to repair 1 or 2 soft spots in the bottom of it,

Beautiful green of fresh FB under all that rotten wood, now I start to see a spotlight at the end of the tunel. Its almost ready to bedding the new wood.

Here is a view of my great and "easy" to work area of the transom, very rare huh? look that big white box at the right of the pic, just full of foam??? Dont know but maybe I cut it to the half.....

Splashwell open so far, It was scary to do this.... believe me! All that wood left on the transom was sanded and feels like if its part of the fb.

 

[krakatoa]

Re: 1993 Glastron OB Transom Restoration...

Inside pattern of Transom

Double pattern already cut, this is a sample since this wood is only 1/2 panel, I want it 3/4, this is treated wood oven dry.

Testing the slip in panel, again this the 1/2 inch wood panel.

this is it for now, have to go shopping again for the 3/4 panel, gloves, brushes and rollers, the fun begin soon!

 

[krakatoa]

Re: 1993 Glastron OB Transom Restoration...

Again testing the 1/2 wood panel for transom

Inside view

In this step taking care of some rot inthe fb, take a look to pic # 1 & 2 in post 16 special atenttion to gray area at the bottom of the transom, then take a look to this one.

Next step, cut the 3/4 plywood water proofing it to finally drop it in, YES!!!

 

[Woodonglass]

Re: 1993 Glastron OB Transom Restoration...

You need to sand off all the white paint or gelcoat in the surrounding areas in order to have 10-12 inches of fresh sanded glass to tab the new transom to. How are you planning on clamping the wood transom to the outer skin of the the boat?

 

[krakatoa]

Re: 1993 Glastron OB Transom Restoration...

You need to sand off all the white paint or gelcoat in the surrounding areas in order to have 10-12 inches of fresh sanded glass to tab the new transom to. How are you planning on clamping the wood transom to the outer skin of the the boat?

Yes, I have to cut the borders arounds, that white paint is Polyurethane, painted when did the floor last April

What about this clamping,