transom repair help

kerome

Cadet
Joined
Feb 5, 2011
Messages
21
Hello all,

I have installed my stringers & floor and when I was measuring transom wall for carpet I felt a very soft spot in the wall around area of former engine bolt holes that were not filled very well. The other areas of the wall are soft as well but not nearly as soft. So now my question, how do I repair this and can I do this w/o removing the motor? Let me know and thanks in advance.
 

Woodonglass

Supreme Mariner
Joined
Dec 29, 2009
Messages
25,929
Re: transom repair help

Welcome to iBoats!

What kind of Boat are we talking about? If the WALL you are talking about is your TRANSOM then THIS IS NOT GOOD. If you replaced the Stringers and Deck why did you NOT check the transom too!!!! If the transom is soft IMHO you will need to replace it. Pics ALWAYS help us to help you, but your description leads me to believe that your transom needs to be replace. I could be wrong but....:rolleyes:
 

oops!

Supreme Mariner
Joined
Oct 18, 2007
Messages
12,932
Re: transom repair help

generally speaking....the stringer makes up the side of the motor mount.....
the soft spot is rotten wood.....the only way to fix that is to replace the wood......that means motor out.

it is possible that you use a band aid.....after you have cleared most of the rotted wood..inject a structural peanut butter mix into the area.

this is a band aid and will only last a season or two before the mount rots away and knocks out your gymbal bearing
 

kerome

Cadet
Joined
Feb 5, 2011
Messages
21
Re: transom repair help

Sorry guys this is a 15 ft fiberglass tri hull with a outboard motor.Im sure it need to be replaced now but how would you go about especially removing the outboard motor that seems to be the most difficult part for me. And for why I didnt check it before I did but before when I cut out the stringers I didnt notice it. Can I replace the stringer from the inside since the inner wall of the transom is rotted? Thanks in advance for any help yall could provide.
 

Woodonglass

Supreme Mariner
Joined
Dec 29, 2009
Messages
25,929
Re: transom repair help

I'm not sure I understand? What is the difficulty in removing the Outboard? What kind is it? Should be pretty straight forward.. Loosen the mounting bolts, disengage the throttle and shifting cables, and gas lines and lift it off.
 

kerome

Cadet
Joined
Feb 5, 2011
Messages
21
Re: transom repair help

I guess its not difficult I've just never done it. Is there any readjustment that has to be done when I go to put it back on? So I guess once I get the motor off I just remove the rivets and plate and cut the cap and remove the rotten wood would this be correct?
 

Woodonglass

Supreme Mariner
Joined
Dec 29, 2009
Messages
25,929
Re: transom repair help

Well there's a LITTLE more to it than that. You REALLY need to post some pics so we can see what you're dealing with. Cut The Cap??? Not sure what this Means.
 

kerome

Cadet
Joined
Feb 5, 2011
Messages
21
Re: transom repair help

DSCF3245.jpgDSCF3244.jpgDSCF3243.jpgOk see the pics have posted. I have a few question on my '71 55 hp chrysler outboard it appears I have to remove the wires from the harness along with the fuel lines, throttle cabless, shifting cables etc. is this correct?(2nd pic) The cap Im referring to is the metal brace the running across along the top of the transom with the rivets in it. What im saying is remove rivets to brace and cut top of transom and dig out all of the wood or is it easier to remove outer transom wall from all appearances and fell there is no flex in out transom wall and but shot inner wall. I appreciate any advice yall can offer. Thanks.
 

Dabbler_E

Petty Officer 1st Class
Joined
Apr 20, 2009
Messages
338
Re: transom repair help

Hi Kerome --

There are a few options, depending on the exact layout of your boat, ranging from most to least involved:

1) For most hulls, replacing with a new wood transom will require separating the top part of the hull (the "cap") from the bottom part. These two pieces are generally held together by a line of rivets or screws under the rub rail that goes all around the boat. Taking the cap off is a chore, but it greatly improves access. Then, cut out the whole transom from the inside, replace with new plywood sealed in fiberglass, tabbed in to the sides of the hull and the stringers. Replace the cap.

For an exquisitely detailed tutorial on this process, including a handy crane for pulling the cap, click on Oops!'s link in his signature (he posted above). It's 160-something pages, but if you read through the first 20 pages of that thread, you will come out 8,000% more knowledgeable about what you're up against than you are now. (and with an uncanny thirst for Corona)

2) In some hulls, it is possible to pull and replace the transom from under the splash well without taking off the cap. In one sense, this seems easier, not having to pull the cap, but the working area will be much more awkward.

3) Remove the metal brace and cut off the fiberglass on top of the transom, carve out all the wood (not just the soft stuff -- it's all rapidly on its way to being soft stuff) and pour in Seacast or a similar material.

There is an immense wealth of knowledge here, and many detailed threads about transom replacement projects. My very sincere recommendation is that you read through several of them, and then come back with whatever questions remain unanswered.

Good luck with this project!
 

kerome

Cadet
Joined
Feb 5, 2011
Messages
21
Re: transom repair help

Dabbler,

Thanks for all of the viable options you gave and I will review the site more thoroughly to see which options make works best for me. Also thanks to the others who offered advise thus far as well.
 

kerome

Cadet
Joined
Feb 5, 2011
Messages
21
Re: transom repair help

DSCF3247.jpgDSCF3246.jpgHello all,

So I did some reading this morning and then preceeded to the garage and lifted motor with the help of a friend as well as cut top cap off of transom to discover a huge mess of rotton wood. So now the question would be just easier to cut the back wall of transom off, or just dig out rotten wood? Check out the pics Ive posted of the work done thus far. If yall suggest digging it out what would work the best, I was thinking and auger attachment for my drill. Thanks in advance.
 

Dabbler_E

Petty Officer 1st Class
Joined
Apr 20, 2009
Messages
338
Re: transom repair help

View attachment 97789View attachment 97791Hello all,
So now the question would be just easier to cut the back wall of transom off, or just dig out rotten wood?

You definitely don't want to cut the back wall of the transom off -- repairing it to the original structural strength and smooth surface will take a tremendous amount of work. You either want to cut/carve/scoop/chainsaw out the wood from the top for a pour-in product or cut the fiberglass holding it in from the inside to replace with wood. When you replace the fiberglass on the inside, it doesn't need to be faired and smoothed and gel coated and polished and ....
 

oops!

Supreme Mariner
Joined
Oct 18, 2007
Messages
12,932
Re: transom repair help

lol....agreed.
do not cut the transom off.

usually rotten transoms can come out with out too much work......(4 hrs)
you might want to think about pulling the cap.....that is easy, other people choose to cut the cap at the transom and re fair and gell it.
i choose pulling the cap, everything is out of the way and you can get in there easy !
 

kerome

Cadet
Joined
Feb 5, 2011
Messages
21
Re: transom repair help

Ok oops! So how do i pull the cap and how difficult will it be to put back on? Dabbler I would get a electric chainsaw but I probably never use again b/c I have a gas chainsaw and Im assuming I cant use that one for the job because the element of danger that would go along with it.
 

Woodonglass

Supreme Mariner
Joined
Dec 29, 2009
Messages
25,929
Re: transom repair help

You could always rent one. To take the cap off entails removing the rubber from the rub rail and taking the screws out our drilliing out the Hundreds of rivets holding it on. Then the entire top of the boat should lift off. Might be some glass tabbing to grind off but you should be able to get it off in 4 hours or so.

check this out.

http://forums.iboats.com/showthread.php?t=442612&page=4
 

kerome

Cadet
Joined
Feb 5, 2011
Messages
21
Re: transom repair help

Hey Wood'
I think it would be best for me to pull top off boat so I can easily access transom plus I can see what stringer at front of boat look like. This way I can be sure its all solid since I plan on keeping it. Me and my neighorbor are going to remove the revits so it should take half the time. Ive already removed the rubber on the cap railing. I must say this is much more than I was ever planning on doing to this boat but oh well at least it will be done correctly and not half way.
 

Woodonglass

Supreme Mariner
Joined
Dec 29, 2009
Messages
25,929
Re: transom repair help

Well the stringers are UNDER the deck. Didn't you just replace the Deck??
 

kerome

Cadet
Joined
Feb 5, 2011
Messages
21
Re: transom repair help

I replaced the deck that was only soft which was the back 3/4th of the boat.
 
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