Transom Rebuild: Wisdom of removing only rear section of cap?

R Steele

Cadet
Joined
May 9, 2013
Messages
19
Trying to assist my father in rebuilding the rotten transom of his bass/bay boat. Having joined this forum and after reading much, it's something we're willing to undertake ourselves. Undecided yet as to the repair method (pour seacast, etc or new wood and glass). He has some fiberglass experience. I'm limited to what I've learned here at this point.

My question regards the wisdom of simply cutting away the back 2-3 feet of the cap in order to access the transom properly. Ideally, I'm sure one would prefer to remove the entire cap, but we are hesitant due to lack of manpower/means to lift it off, and also the way the cap is integrated into such things as the console, and forms the top of the bench seat/live-well that spans from side to side, etc.

DSCN0121s.jpg

The thought is to cut across the gunwale somewhere in the vicinity of the stern light receptacle and down the inside (after rub rail removal). Once cut on both sides, we think the rear section of the cap, including splash well should come off pretty cleanly. There is not much height to the cap on the exterior where it joins the hull, so the tricky cutting should be minimal.


DSCN0122s.jpg


The rear section of the cap needs it's own repairs. In the first pic, you can see the fractures where the front of the splash well meets the sides, caused by the sag of the transom when motor was installed.. The fracturing actually extends up under the vent cover. The other side is even worse. Below you can see a fracture under where the motor was mounted and also fracturing where the bottom of the well meets the back wall. We think having it off would make all the splash well repairs easier.

DSCN0124s.jpg


The concerns we have regard reattaching the cap sections back together down the road. There is relatively good access to the underside where we propose to cut. I would think we could re-glass under there to the point where it is just as strong as before.

I have seen other posts where folks have cut off the entire back skin to fix the transom. Others have cut out the splash well area. We are wondering whether it's a bad idea to only cut the back section off the cap. We are unsure as to what strength the cap contributes to the overall boat.

Any advice would be greatly appreciated. Thanks!
 
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Woodonglass

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Dec 29, 2009
Messages
25,929
Re: Transom Rebuild: Wisdom of removing only rear section of cap?

I'd recommend cutting the gunwales about 3-4" in front of the splashwell. Putting it all back together and getting a strong bond is really not much of an issue. If you're going to try and gelcoat it and match the gel coat THAT could be a problem but if you're not to picky or if you're gunna paint it then you're good to go. Something like this is what you're looking for...

CuttingoffBackSplash.jpg
 

dOb

Petty Officer 1st Class
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Jun 14, 2010
Messages
244
Re: Transom Rebuild: Wisdom of removing only rear section of cap?

On my last project I cut the splashwell off to repair the transom. In my case, I discovered rot and ended up pulling the rest of the cap off for a full restore. My thinking was the same as yours. If the transom is truly the only thing in need of repair, then reattaching the cap won't be that hard down the road. If you look at my signature, the link to my last project will have some pictures about reconnecting the splashwell on page 3 post #59.

Good luck.
 

GT1000000

Rear Admiral
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Jul 13, 2011
Messages
4,916
Re: Transom Rebuild: Wisdom of removing only rear section of cap?

It is totally and completely doable as has been mentioned, but be aware that where there is usually a rotten transom, the stringers and deck may also be affected...:rolleyes::)
 

NickMcCabe

Petty Officer 2nd Class
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Jul 30, 2013
Messages
122
Re: Transom Rebuild: Wisdom of removing only rear section of cap?

Check out this video before you decide. It may not be the same type of boat you have but I believe the technique is the same. The guy in it does a good job of illustrating console separation and other details. Makes the cap removal look relatively straightforward. I am about to take it on myself and have no experience with boat work.

10.1 Removing the Cap to continue teardown for stringer replacement part 1. - YouTube
 

R Steele

Cadet
Joined
May 9, 2013
Messages
19
Re: Transom Rebuild: Wisdom of removing only rear section of cap?

Thanks everyone!

Woodonglass - Thanks for the pic and advice. I've learned a lot from your 'Flamingo' thread already. Still haven't finished all pages!

dOb - Your thread is very helpful and is exactly what we expect to be dealing with with putting the cap back together. If I'd found it earlier, I probably wouldn't have needed to post this question :)

Nick - that video is very helpful. I think we're going to worry about only the rear section at this time, but still good to know the details.

GT - my dad and brother rebuilt much of the floor two seasons ago. They knew the transom was on its way then, but it wasn't as bad as it is now. They'd heard of Seacast and believed it would be simple to cut the top off the transom and pour it in. It wasn't until after I joined this forum and began to research that I found that it usually doesn't work like that. After inspection, I'm convinced we need to get the splash well out of the way and remove the inner transom skin, which appears to be paper thin. Give it a good clean out and decide from there if we want to go wood & glass or a pour method. Probably leaning to wood & glass at this point.

Thanks again all!
 

Woodonglass

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Re: Transom Rebuild: Wisdom of removing only rear section of cap?

I'll make my spiel again. The typical wood transom, when fabricated and installed correctly will last indefinitely. It's all about Care and Maintenance. If the owner of the boat always inspects the transom for damage and takes immediate care of any issues, Always pre-drills and then coats the holes and hardware with appropriate sealant then there is no reason for the wood to deteriorate. It's in a sealed environment and the plywood is created with 100% waterproof glue with high pressure laminations. My 1961 Lonestar is still running the original transom. I am the 2nd owner. Always covered, and inspected before and after every use. As with almost anything, If you take care of it, it will last.;)
 

R Steele

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Joined
May 9, 2013
Messages
19
Re: Transom Rebuild: Wisdom of removing only rear section of cap?

Woodonglass, your past posts on this are the reason we're leaning this way :)

Hole issues are what accelerated this problem I believe. He replaced an old Merc outboard with a new Evinrude around 2008. Had the dealer install it. With the outboard and an exterior painted plywood 'transom plate' (!) now removed, we find they simply filled the old holes with a wooden dowel and slapped silicon over them. Used only silicon on the new bolts as well.

When the time comes I expect to drill a bit oversize, fill with PB, re-drill to proper size, use 5200 (based on what I've learned here)

You guys have been very helpful and I hope you will continue to indulge me as we move along. Thanks again!
 

DeepBlue2010

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Aug 19, 2010
Messages
1,305
Re: Transom Rebuild: Wisdom of removing only rear section of cap?

I would strongly encourage you to reevaluate your reasons for not pulling the whole cap. Cutting through the cap will involve ? in my mind?s eye at least ? a significant amount of glassing and fairing work most of it needs to be done in tight places with the gravity working against you. In my experience, the space, leverage, gravity are underestimated factors that show their ugly face while the job is underway and they turn a job that once perceived to be a piece of cake into a significant challenge. Sure lifting the cap is also a challenge but at least it is a much more accessible job. The lack of man power can be compensated for by using the right leverage (steel cables or heavy lines attached to the cleats, centered in the middle and connected to a chain left which is mounted to a wood structure that spans the width of the boat will get the job done. I am not claiming that this is the ?right? way to do it; it is just my perspective and food for thoughts. Best of luck to you and your father.
 

Woodonglass

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Dec 29, 2009
Messages
25,929
Re: Transom Rebuild: Wisdom of removing only rear section of cap?

This iBoat member on Page 3 starting with post #59 shows the method for repairing the cut gunwales. I'd prolly mix up some PB and tape the underside off and fill the cut with the PB first and then grind the bevel. Other than that it's a good representation of how to do it. It'll be strong and almost totally invisible.

http://forums.iboats.com/boat-resto...15-reinell-tri-hull-restoration-450405-3.html
 
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