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Transom rot

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Old 06-02-2018, 06:47 PM
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Default Transom rot

I am new to THT. Thanks in advance for any advice and knowledge shared. I have come into a boat that is being given to me for free. It's a fiberglass 22' cobia closed bow inboard outboard 6cyl. The motor runs very strong, hull is immaculate, only mechanical issue is the trim pump. However here is my dilemma, the transom floor and stringers are shot. Considering I have paid nothing does anyone think the repair would be worth it? I am a carpenter by trade and am confident I can handle the wood aspect but I've never really worked with fiberglass. Should I get away from it or go all in? I'm torn. BTW I have set my budget to $2500. Is this even an obtainable goal? Also recommendations for literature on the subject would be fantastic.
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Old 06-02-2018, 10:54 PM
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Head over to Bateau.com. They have a tutorial that will explain the process very well.
You are looking at a ton of work. It is not brain surgery just plain old sweat labour.
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Old 06-02-2018, 11:58 PM
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Another one of them !!
oK THE BOAT WILL BE MADE FROM POLYESTER RESIN !! To make the resin harden you need catalyst this needs to be measured accurately Or you headed for problems, Temperature and humidity are you two biggest issues ! When you buy the resin get the correct catalyst to go with the resin and ask the RATIO to mix at . These things are adjustable to speed up or slow down the hardening process !
Experiment and get the feel of what you are doing and how things work !
Get a spec sheet from the manufacture that will have guideline s for the ratio of catalyst Upper and Lower AND NEVER EXCEED EITHER !
TO much the resin becomes very hard quickly and brittle !! to little the resin never hardens and STAYS like rubber and no mater what you do will NEVER GO HARD !
ALWAYS REMEBER THESE RESINS AND CATALYST ARE DANGEROUS AND TAKE CARE ALWAYS
Prevention is easyer than cure so wear goves and safety glasses and have eyewash close at hand always !!

The most common glass used is Chopped strand matt and woven roving !! these two come in various weights so again check with the supplier !!. This is what the boat would have been made with originally !!
These are easy to use and easy to work with ! Cutting just need some good scissors and a craft knife makes life easy !
This is just the beginning !!

Last edited by tunnles; 06-03-2018 at 01:37 PM. Reason: add to
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Old 06-03-2018, 05:22 AM
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Originally Posted by Jadob View Post
I am new to THT. Thanks in advance for any advice and knowledge shared. I have come into a boat that is being given to me for free. It's a fiberglass 22' cobia closed bow inboard outboard 6cyl. The motor runs very strong, hull is immaculate, only mechanical issue is the trim pump. However here is my dilemma, the transom floor and stringers are shot. Considering I have paid nothing does anyone think the repair would be worth it? I am a carpenter by trade and am confident I can handle the wood aspect but I've never really worked with fiberglass. Should I get away from it or go all in? I'm torn. BTW I have set my budget to $2500. Is this even an obtainable goal? Also recommendations for literature on the subject would be fantastic.
Imo 2500 would get you materials for a floor and transom. If you need stringers to you may run over your budget. Add the cost of paint primer and filler on top of the price.

Consider the time it takes before tearing into it. These projects can get kind of lengthy.

If you enjoy a good project then you will probably have fun with it and have a nice boat in the end.

Post some pictures if you get a chance.
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Old 06-03-2018, 06:11 AM
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Originally Posted by tunnles View Post
Another one of them !!...!
Another one of them...what?
And, why are you YELLING AT THE GUY for wisely seeking advice before starting a project?
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Old 06-03-2018, 06:49 AM
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Ive restored a 69 Mercury Cougar, 2 jet skis, a Polaris sportsman and a jeep. Each time I found a good forum like this, in addition found literature and read for weeks. I don't plan on cutting until Im comfortable with the knowledge I've acquired. Thanks for all the info and I will post pics. I know the new guy questions are a bit repetitive and get old but I do appreciate the responses.
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Old 06-03-2018, 07:12 AM
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I think you'll do fine. And, yes, I think the project will be well worth it - especially since you say it has a strong engine. It will be long, messy, sweaty, and especially itchy work. But from a cost ratio compared to buying the boat, you will make out like a bandit - especially since the boat will now be re-built and have a much longer life expectancy than buying a used one with no work done.

Try BoatworksToday on You Tube and his blog. Good info there. He has a video: "How To Fiberglass Over Plywood" that basically shows you the steps you would be using to glass in your stringers.
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Old 06-03-2018, 08:10 AM
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Yeah, you can do that with your budget. It's going to be long, nasty, dirty work though. Plenty of resources on the internet - youtube, etc for how to do everything. There's one guy who did an I/O that you might find helpful, Friscoboater:

Boatworks today is good for how-to's on specific topics.
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Old 06-03-2018, 08:11 AM
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Originally Posted by Jadob View Post
Ive restored a 69 Mercury Cougar, 2 jet skis, a Polaris sportsman and a jeep. Each time I found a good forum like this, in addition found literature and read for weeks. I don't plan on cutting until Im comfortable with the knowledge I've acquired. Thanks for all the info and I will post pics. I know the new guy questions are a bit repetitive and get old but I do appreciate the responses.
At some point picture of Cougar would be cool. (You didn’t mean wife?)
Bad joke sorry...
Seriously lots of pictures of the boat will help,
I had not touched fiberglass since bondo/glass when I was a kid 30 years ago. The boat technology while similar is a fun challenge.


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Old 06-03-2018, 10:23 AM
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Quick question, is there anything that fastens the transom plywood to the stringers other than fiberglass? I haven't seen anything specific to that..
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Old 06-03-2018, 10:49 AM
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Originally Posted by scallen2112 View Post
Another one of them...what?
And, why are you YELLING AT THE GUY for wisely seeking advice before starting a project?
That's just tunnles - he means well but doesn't seem to know the different between a period and at least two exclamation marks! So every sentence looks like this!! And it seems like he's shouting!! It can be exhausting!!

OP, you can do it. As others have said, it's messy and takes a while but it's really not that hard. To answer your question about joining the transom to the stringers: just fiberglass, and resin: some thickened resin in the joint (using something like cabosil to turn the resin into a paste) and then layers of mat over the top to tab them together. That will be a VERY strong joint.

Grab a box of nitrile gloves, and plenty of talcum power and you will be fine. The talcum powder prevents all the glass fibers from getting in your skin and giving you that horrid itchy feeling. Stay ventilated, stay cool in body and mind and get a nice slow hardener so you have plenty of working time. I think that would be my #1 tip: as a newb you won't be a speed machine when laminating, but a nice slow hardener will give you time to take it easy. Resin becomes horrible quickly when it starts to cure.

$2500 is plenty of budget IMO depending on the floor finish you are looking for. Where it gets expensive is when you get into layers and layers of faring to make it perfect.
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Old 06-03-2018, 12:35 PM
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Default so waht info have you got ??

Originally Posted by scallen2112 View Post
Another one of them...what?
And, why are you YELLING AT THE GUY for wisely seeking advice before starting a project?
sorry did you want something??
If you haven't got useful constructive information to give anyone then I suggest YOU LEAVE !!
Go to the S AND F site they love people like you and will welcome you with open arms !!
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Old 06-03-2018, 12:39 PM
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Originally Posted by tunnles View Post
sorry did you want something??
If you haven't got useful constructive information to give anyone then i suggest you leave !!
Go to the s and f site they love people like you and will welcome you with open arms !!
lol
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Old 06-04-2018, 05:16 AM
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When I get a min I'll post pics of the rot and what I'm up against
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Old 06-04-2018, 07:09 AM
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Originally Posted by tunnles View Post
sorry did you want something??
If you haven't got useful constructive information to give anyone then i suggest you leave !!
Go to the s and f site they love people like you and will welcome you with open arms !!
what is the s and f site?!!!!
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Old 06-04-2018, 07:28 AM
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Originally Posted by donjay View Post
what is the s and f site?!!!!
screamandfly.com

Pay no attention - lots of good info on here about your job. Run a search on transom repairs and you'll get a ton of hits, including some good information about composite and pourable cores. Sounds like you are doing stringers too so pourable probably isn't what you are looking for, but you might decide to go for something other than wood for the cores. Don't be discouraged from wood though - lots of people on here have religion about wood rotting in hulls: just use the right materials, get everything laminated correctly and seal all penetrations and wood will last many decades.
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Old 06-04-2018, 07:18 PM
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Originally Posted by tunnles View Post
Another one of them !!
oK THE BOAT WILL BE MADE FROM POLYESTER RESIN !! To make the resin harden you need catalyst this needs to be measured accurately Or you headed for problems, Temperature and humidity are you two biggest issues ! When you buy the resin get the correct catalyst to go with the resin and ask the RATIO to mix at . These things are adjustable to speed up or slow down the hardening process !
Experiment and get the feel of what you are doing and how things work !
Get a spec sheet from the manufacture that will have guideline s for the ratio of catalyst Upper and Lower AND NEVER EXCEED EITHER !
TO much the resin becomes very hard quickly and brittle !! to little the resin never hardens and STAYS like rubber and no mater what you do will NEVER GO HARD !
ALWAYS REMEBER THESE RESINS AND CATALYST ARE DANGEROUS AND TAKE CARE ALWAYS
Prevention is easyer than cure so wear goves and safety glasses and have eyewash close at hand always !!

The most common glass used is Chopped strand matt and woven roving !! these two come in various weights so again check with the supplier !!. This is what the boat would have been made with originally !!
These are easy to use and easy to work with ! Cutting just need some good scissors and a craft knife makes life easy !
This is just the beginning !!
Dude, get back on the MEDS!
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Old 06-05-2018, 12:09 AM
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And so heres another one of those posters Nothing constructive to CONTRIBUTE just childish behavior ,WHY DO YOU BOTHER??
DOES IT MAKE YOU FEEL IMPORTANT ??
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Old 06-05-2018, 03:59 AM
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Originally Posted by tunnles View Post
And so heres another one of those posters Nothing constructive to CONTRIBUTE just childish behavior ,WHY DO YOU BOTHER??
DOES IT MAKE YOU FEEL IMPORTANT ??
"Hi pot, meet kettle"
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Old 06-05-2018, 04:09 AM
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And another one ! cant leave it alone must poke there oar in and be seen !
Come on there got to be more that cant resist the temptation !
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