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02-04-2014, 10:13 PM
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#1
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Registered User
Country: engalnd
Location: south west
Interests: ski racing
Boat name: Jack'd up, hellraiser
Boat make: Bernico 19 ET, ring 16
Engines: merc 135, merc 175, yam 90
Cruising area: Plymouth
Join Date: Jun 2006
Location: south west
Posts: 1,176
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transom rebuild?
On closer inspection my transom is very poorly
Any advice, threads on how to fix?
Thanks
Chris
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03-04-2014, 10:53 AM
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#2
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Registered User
Country: In the UK, in my office, working, waiting to go boating.
Occupation: Chartered Engineer
Interests: boats, water, snow, football
Boat name: “DoubleSix”; “Blue Lias”
Boat make: Ring 21c; Pacemaker 21
Engines: Opti 200; twin Volvo AQ110s
Cruising area: Lyme Bay
Join Date: Aug 2012
Posts: 138
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Sorry I don't have any advice, but I just noticed the irony of your post that made me smile.
You have a dodgy transom and your sign off says 225 HP on the way!
Hope you manage to get it fixed without too much pain and grief, summer is coming.
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03-04-2014, 01:30 PM
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#3
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Registered User
Join Date: Sep 2007
Posts: 513
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I assume the boat has an outboard well, so it's a difficult job. Unless it's a fairly decent boat, or your able to do the job yourself, then the cost of it quite often comes to more than the value of the boat. If the transom needs a complete replacement, then you need to either take the deck off, of cut the well out. This together with the cost of materials, is £££££
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03-04-2014, 08:46 PM
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#4
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Registered User
Country: Guernsey Channel Isles
Location: West Coast
Occupation: Hotelier
Interests: Powerboat racing
Boat name: Vodkatini,Cap Camarat,Easy RiderSuper Rider & Hirrondelle
Boat make: Phantom 21,Jeaneau 925 Avenger19.Lorne Campbell Slipstream Tremlett 21.Tigershark 21
Engines: Volvo 5 litre,Merc 115 Tower,Twin 250 Suzukis and 145 Mercruiser LX
Cruising area: Channel Islands and French coast
Join Date: Jan 2009
Location: West Coast
Posts: 612
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It's a bit of a job putting in a new transom. I've been fitting a new one to my Avenger19 over the winter together with new knees and stringers.
I have seen transoms braced with Stainless struts and reinforced with more plywood glassed In between the knees and SS engine plates.
It depends how bad it is really.
I see the Americans have a pourable solution to transoms where they just cut off the top lip of the transom a GRP takeout the rot and pour in a two pack mixture.
The best you can do to evaluate how bad it is is to tap all over the inside of the transom with a hammer and listen for a change in pitch.where it's nice and firm there will be a firm sound and softens where the rot is. Also look for flex and stress marks.
It's a shame to write off these old boats- have you got any carpenter and or GRP laminator mates ?
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Guernsey - The home of offshore powerboat racing
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03-04-2014, 08:56 PM
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#5
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Registered User
Country: england
Location: southampton
Occupation: engineer
Interests: lots
Boat make: scorpion 8.1
Engines: 250HO
Cruising area: solent
Join Date: Mar 2004
Location: southampton
Posts: 1,353
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inside out, or outside in.... thats all you have to choose.
If you have good rear access, take it out form inside, but you will need access to the top of transom, most likely.
Outside in, they just seem to chop em off, leave a lip. then glass new wood in. Seems an easier route to me, except the sanding and making it look good.
I still cant work out, why no one laminates gel, then fibreglas, then wood to a flat surface, the size of the transom, then glues that into the rear of the boat. there must be a reason as no one seems to do it.
PS TD likes transoms
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03-04-2014, 10:09 PM
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#6
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Registered User
Country: uk
Location: up north
Interests: boats
Boat make: Avenger 21
Engines: merc 150 il6
Cruising area: in my pond
Join Date: Nov 2012
Location: up north
Posts: 57
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transom replacement
I have just replaced transom on a 21ft Avenger .big job hopefully well worth doing. I also glassed on a gel faced panel to 50mm of marine ply and am very pleased with the finish so far. will try to add some pics
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04-04-2014, 01:49 AM
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#7
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Registered User
Country: UK
Location: Surrey
Occupation: Motorsport Development inc Engine Managment
Boat make: 21ft
Engines: Various
Cruising area: Solent / Kent / Cornwall
Join Date: Oct 2011
Location: Surrey
Posts: 375
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I rebuilt the transom on my fletcher and also just finishing off a new 54mm + glass transom o my sports cuddy. Its a lot of work but doable. I've done mine from the inside... removing the old one is the challenge. I chiselled out what I could the ground out the rest. Both transoms were worse than they appeared. If you thnk its rotten then its probably worse than it looks.
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04-04-2014, 10:49 AM
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#8
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Registered User
Country: Ireland
Location: Dublin
Occupation: Boatbuilder
Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
Cruising area: Malahide, Dublin
Join Date: May 2004
Location: Dublin
Posts: 1,803
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We do them all the time.. my rule of thumb is about 1000 euro plus cosmetics.
Easiest way by far is to cut the well out, then glass it back in.
Cosmetics is finishing in the well, either spray in 2 pack.. cheaper or gelcoat.. a bit more expensive.
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04-04-2014, 01:15 PM
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#9
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On a roll
Country: England
Location: Plymouth
Occupation: Anything in metal
Interests: Bristol Rovers, Cider & Boats
Boat name: Aqua Thunder, Badboy
Boat make: Bernico F2, Phantom 21
Engines: Merc 280efi, Merc 260efi
Cruising area: Worldwide
Join Date: Mar 2004
Location: Plymouth
Posts: 2,249
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Quote:
Originally Posted by freedom
On closer inspection my transom is very poorly
Any advice, threads on how to fix?
Thanks
Chris
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What boats this Chris?
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All hail to Jail Ale
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05-04-2014, 01:27 AM
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#10
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Registered User
Country: England
Location: Essex
Occupation: Retired
Interests: too many
Boat name: Bermuda and Jack Wise
Boat make: P18 and Crusader16
Engines: 150merc and looking for a SB chevy
Join Date: Aug 2012
Location: Essex
Posts: 27
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Finished making a new transom late last year,sealed it but could not fit it in time,i only had one sash clamp so screw planning was important.
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05-04-2014, 08:37 AM
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#11
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Registered User
Country: england
Location: southampton
Occupation: engineer
Interests: lots
Boat make: scorpion 8.1
Engines: 250HO
Cruising area: solent
Join Date: Mar 2004
Location: southampton
Posts: 1,353
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Quote:
Originally Posted by born free
I have just replaced transom on a 21ft Avenger .big job hopefully well worth doing. I also glassed on a gel faced panel to 50mm of marine ply and am very pleased with the finish so far. will try to add some pics
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so did you lay it up with gel before fitting to boat? Looks good.
What wood do you lot use?
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05-04-2014, 04:59 PM
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#12
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Registered User
Country: uk
Location: up north
Interests: boats
Boat make: Avenger 21
Engines: merc 150 il6
Cruising area: in my pond
Join Date: Nov 2012
Location: up north
Posts: 57
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Quote:
Originally Posted by glen76
so did you lay it up with gel before fitting to boat? Looks good.
What wood do you lot use?
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I actually used a cured seperate 2mm gel finished panel then laid up 2x sheets of csm and pressed them onto the marine ply and left them clamped for a day . next job is to turn boat over rub the lot down and re-gel ! just need some time
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09-04-2014, 07:26 AM
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#13
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Registered User
Country: The Netherlands
Boat make: RING 21C
Engines: Mercury 2.4carb 200 (Mazco RE4, Chopper 24, Tempest 24)
Cruising area: The Netherlands, Gardalake (IT)
Join Date: Sep 2007
Posts: 153
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My Ring 21C (done by person here in Holland).. Just for the pictures, it's all in Dutch
http://www.snelleboten.nl/viewtopic....=asc&start=240
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05-05-2014, 02:53 PM
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#14
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Registered User
Country: england
Location: southampton
Occupation: engineer
Interests: lots
Boat make: scorpion 8.1
Engines: 250HO
Cruising area: solent
Join Date: Mar 2004
Location: southampton
Posts: 1,353
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What timber you lot using in UK?
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05-05-2014, 11:36 PM
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#15
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Registered User
Country: England
Location: Essex
Occupation: Retired
Interests: too many
Boat name: Bermuda and Jack Wise
Boat make: P18 and Crusader16
Engines: 150merc and looking for a SB chevy
Join Date: Aug 2012
Location: Essex
Posts: 27
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Quote:
Originally Posted by glen76
What timber you lot using in UK?
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Personally i used 18mm marine plywood from Leigh Timber,i found it had the right amount of flexibility for laminating (3x18mm=54mm),i got the transom the stringers and fuel tank bracers out of one 8'x4' sheet.
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01-10-2016, 02:38 PM
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#16
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Registered User
Country: uk
Location: essex
Occupation: s/e motor mechanic
Interests: watersports squash
Boat name: floozie
Boat make: 170 bayliner
Engines: 125 mercury force
Cruising area: essex river crouch
Join Date: Sep 2016
Location: essex
Posts: 30
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hi shaun I am Essex based have a 170 bay liner these only have wood directly where outboards mount not across whole rear of boat so have you any ideas about replacing transom timber on this have seen american idea of poured chemical but seems to be some concern on boats where transom skin do not extend from one side to other thanks
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