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Old 18 November 2018, 12:51   #1
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Suggestions for repair...

Hi all, looking for your collective wisdom please!

Iím swapping engine, sold mine and the new one (from a fellow forum member) is going on next weekend. With a few days before the replacement engine arrives, I have the opportunity to correct some things on the transom. Firstly, there is some cracking in the gelcoat to the top of the transom, secondly, thoughts on the position of my current transducer?

For the cracking I was just going to cut out a v shape groove (very small one) along the cracking and full with fresh gelcoat, sand, Polish etc etc. I was told my a marine workshop itís nothing to worry about ... do you agree - could it be water in the transom and the core expanding a bit? Should I consider a metal brace? Or is it simply just some innocent gelcoat surface cracking from a 13 year old hull?

Ps boat since had a clean ..

Thanks all!Click image for larger version

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Old 18 November 2018, 13:18   #2
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I'd be a bit concerned about that, my view is it's more than just in the gelcoat.

Does it live inside a building? At the very least I would want to get that bone dry and then get it filled with something flexible to stop water getting in there. I don't think it's currently terminal, but it will go that way if left.

Just my opinion based on those photos.

I wouldn't use gelcoat on that, as when you tighten up the bolts holding the engine on, it will crack again then letting in more water to damage it further. Make sure you get a good seal on the engine bolts as, its important water can't get inside the transom from here as well.

Let's wait and see if anyone else agrees with me.

Good luck with it.
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Old 18 November 2018, 13:46   #3
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Quote:
Originally Posted by Ribtecer View Post
I'd be a bit concerned about that, my view is it's more than just in the gelcoat.



Does it live inside a building? At the very least I would want to get that bone dry and then get it filled with something flexible to stop water getting in there. I don't think it's currently terminal, but it will go that way if left.



Just my opinion based on those photos.



I wouldn't use gelcoat on that, as when you tighten up the bolts holding the engine on, it will crack again then letting in more water to damage it further. Make sure you get a good seal on the engine bolts as, its important water can't get inside the transom from here as well.



Let's wait and see if anyone else agrees with me.



Good luck with it.


Thanks Ribtecer, so perhaps use something like marine adhesive/sealant, like sikaflex?

It lives outside so limited opportunity to get it dry, but could cover the crack for a few days to let it dry out before applying sealant...
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Old 18 November 2018, 14:25   #4
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To me it looks like the transom is not capped. That is when the top cut edge of the transom has glass fibre cloth joining the inside to the outside lapping the exposed ply core. This should be done during the build process.

Best thing is to do this before new eng8ne is fitted. Doing an isolated repair will n9t be helpful in the long run and more problems will develop. Capping with 3 layers of 450g cam over lapping front and back of transom by at least 50mm should work. Before this is done all gel coat and flow coat should be removed some the new laminate in on top of old laminate. Gel coat does not help the adhesion.

If you want more help please contact me as I am only down the road in Southampton.

Is there an issue with the current transducer location?
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Old 18 November 2018, 15:09   #5
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Like others I think that is more of a problem than Gelcoat stress/cracking..Looks from the photos the Ply is delaminated through getting wet!... by changing the engine you may have just dodged a (large Calibre!) Bullet!

If it were MINE ..I'd get it as dry as poss as said..and cover completely (over sized) with a SS jacket/re-forcing plate slid over Transum sikaflexed and bolted through both sides...into fresh wood.
I've done this twice for friends Boats in the past ...and it works!....not the cheapest solution but compared to the rest...The Best.
PM me if you'd like me to put you in touch with my Guy.
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Old 18 November 2018, 15:39   #6
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+1 with the comments above although I'm not a fan of the stainless steel re-inforcement.

Whilst I wouldn't fill with gelcoat, you could consider making a vee as you suggest and then filling with epoxy and microfibres.

If you expose the core, you'll be able to see whether it is wet - hopefully not.

Transducer - it's on the correct side for a normal rotation propeller and it looks about the right height. You could ensure the holes are sealed but other than that it seems OK.

Good luck and well done to Butty for offering help.
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Old 18 November 2018, 15:44   #7
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Quote:
Originally Posted by Maximus View Post
Like others I think that is more of a problem than Gelcoat stress/cracking..Looks from the photos the Ply is delaminated through getting wet!... by changing the engine you may have just dodged a (large Calibre!) Bullet!

If it were MINE ..I'd get it as dry as poss as said..and cover completely (over sized) with a SS jacket/re-forcing plate slid over Transum sikaflexed and bolted through both sides...into fresh wood.
I've done this twice for friends Boats in the past ...and it works!....not the cheapest solution but compared to the rest...The Best.
PM me if you'd like me to put you in touch with my Guy.
I think that's good advice - l'd not thought of the stainless option. Also, as many engines are stolen with a chainsaw, this solution would slow them down as well.

A few days won't help drying it out, it wants weeks if not months of warm dry air over it - sorry, but its a fact. You'll end up trapping the moisture in there, which you don't want to do.
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Old 18 November 2018, 17:57   #8
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I think that's good advice - l'd not thought of the stainless option. Also, as many engines are stolen with a chainsaw, this solution would slow them down as well.
Or just result in a larger section being cut out.....

Why manufacturers donít put a couple of strips of 2Ē wide stainless or similar or layer it into the ply core along the transom under the gel coat at manufacture which wouldnít cost anything but minor material costs would certainly make life more difficult for this type of theft.
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Old 18 November 2018, 18:15   #9
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Quote:
Originally Posted by Maximus View Post
Like others I think that is more of a problem than Gelcoat stress/cracking..Looks from the photos the Ply is delaminated through getting wet!... by changing the engine you may have just dodged a (large Calibre!) Bullet!

If it were MINE ..I'd get it as dry as poss as said..and cover completely (over sized) with a SS jacket/re-forcing plate slid over Transum sikaflexed and bolted through both sides...into fresh wood.
I've done this twice for friends Boats in the past ...and it works!....not the cheapest solution but compared to the rest...The Best.
PM me if you'd like me to put you in touch with my Guy.


Max

What about getting it professionally fixed then get the ST steel plate on it. Belt and braces
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Old 19 November 2018, 04:30   #10
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Quote:
Originally Posted by butty View Post
To me it looks like the transom is not capped. That is when the top cut edge of the transom has glass fibre cloth joining the inside to the outside lapping the exposed ply core. This should be done during the build process.

Best thing is to do this before new eng8ne is fitted. Doing an isolated repair will n9t be helpful in the long run and more problems will develop. Capping with 3 layers of 450g cam over lapping front and back of transom by at least 50mm should work. Before this is done all gel coat and flow coat should be removed some the new laminate in on top of old laminate. Gel coat does not help the adhesion.

If you want more help please contact me as I am only down the road in Southampton.

Is there an issue with the current transducer location?


Thanks Butty, will send you a PM. Thanks for your kind offer! Humber have also confirmed it needs a professional repair, they suggested not filling or using a flexible filler. Looks like itís a good job Iíve caught this now!
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