Reply
 
Thread Tools Search this Thread
 
Old 14 August 2006, 08:21   #1
Member
 
Country: UK - Wales
Make: Osprey
Length: 7m +
Engine: outboard
Join Date: Oct 2004
Posts: 66
Transom work

Hi ribnetters.

I am after a bit of advice from the knowledgeable.

I am changing my outboard for one with a longer leg, and need to fill in a cut out in the transom. The engine is also wider than the one being removed so raising the outboard solves having to widen the existing cut out.

I am proposing to infill the cut out with treated timber, which will be glassed in to match the transom. To strengthen this area I will then fix a 6mm stainless steel plate to the inside face of the transom.

PDF sketch attached.

The engine will then be clamped and bolted to the transom in the normal way.

Any advice, comments or better ways to achieve this would be most welcome.
Attached Files
File Type: pdf transom.pdf (63.2 KB, 226 views)
__________________

__________________
Viper is offline   Reply With Quote
Old 14 August 2006, 08:37   #2
Member
 
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Make: BLANK
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
What boat and what engine?

I would be tempted to get a transom jack or lifter. Saves messing about with the transom and maybe you won't nedd to get a longer shaft engine?

http://www.cook-mfg.com/

Great VFM and with the $ so weak you can get a bargain!!!
__________________

__________________
codprawn is offline   Reply With Quote
Old 14 August 2006, 10:48   #3
Member
 
Country: UK - Wales
Make: Osprey
Length: 7m +
Engine: outboard
Join Date: Oct 2004
Posts: 66
Transom Work.

Sorry Codders,

seems a little over kill, all that lifting kit will probably weigh more than the engine!

It is only a 40hp on a 5m rib.
__________________
Viper is offline   Reply With Quote
Old 14 August 2006, 11:29   #4
Member
 
Country: UK - England
Town: Saltash, Cornwall
Make: Rib less:-(
Length: no boat
Join Date: Sep 2002
Posts: 693
Viper,
We have used a timber replacement section with large (3-5mm) S/Steel plates bolted through on inflatables, with hand stear 40hps on them.
This worked fine, the plates were about 4-5 inches bigger than the replacement section. We didn't glass it as it meant we could put a short shaft on the boat when the main engine was getting fixed.
good luck
Jelly
__________________
Jelly is offline   Reply With Quote
Old 14 August 2006, 11:34   #5
Member
 
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Make: BLANK
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
Quote:
Originally Posted by Viper
Sorry Codders,

seems a little over kill, all that lifting kit will probably weigh more than the engine!

It is only a 40hp on a 5m rib.
Ahh
__________________
codprawn is offline   Reply With Quote
Old 14 August 2006, 11:44   #6
RIBnet supporter
 
bedajim's Avatar
 
Country: UK - England
Town: Cambs/Northants
Length: no boat
Join Date: May 2006
Posts: 2,499
Hi

My searider has a piece of treated hard wood bonded in and then a 5-6 mm aluminium plate folded to fit over the transom so it covers the inside and the outside with the engine bolts going trough it, I've not seen it move and no cracks

James
__________________
bedajim is offline   Reply With Quote
Old 14 August 2006, 16:13   #7
RIBnet supporter
 
Erin's Avatar
 
Country: UK - Channel Islands
Town: A large rock
Boat name: La Frette
Make: Osprey Vipermax
Length: 6m +
Engine: 200 Suzzy
Join Date: May 2004
Posts: 2,830
I would have thought that given the stresses, and the fact the engine 'pushes' the boat along most of the time, that it may be better to have the reinforcing metal plate on the outside. IMHO
__________________
Erin is offline   Reply With Quote
Old 14 August 2006, 17:44   #8
Member
 
Powerboats's Avatar
 
Country: UK - England
Town: Southampton
Make: ZAR
Length: 9m +
Join Date: Jul 2006
Posts: 140
I would say that, assuming you wish this modification to be permanent, that your plan is the most effective way of achieving your goal.

If I were doing it, as well as the stainless steel plate on the inside of the transom, I would fit a section of marine ply on the outside of the transom to absorb the "grips" on the inside of the transom mount of the engine.
__________________
Powerboats is offline   Reply With Quote
Old 14 August 2006, 18:08   #9
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 235090687/235055163
Join Date: Jul 2005
Posts: 12,645
RIBase
Quote:
Originally Posted by Erin
I would have thought that given the stresses, and the fact the engine 'pushes' the boat along most of the time, that it may be better to have the reinforcing metal plate on the outside. IMHO
I'd put the reinforcing both sides so it clamps the modified section.
__________________
Need spares,consoles,consumables,hire,training or even a new boat?

Please click HERE and HERE and support our Trade Members.

Join up as a Trade member or Supporter HERE
Nos4r2 is offline   Reply With Quote
Old 15 August 2006, 05:11   #10
Member
 
Cookee's Avatar
 
Country: UK - England
Town: Salcombe, Devon, UK
Boat name: BananaShark
Make: BananaShark
Length: 10m +
Engine: 2xYanmar 260 diesels
Join Date: Mar 2003
Posts: 4,225
Quote:
Originally Posted by codprawn
What boat and what engine?

I would be tempted to get a transom jack or lifter. Saves messing about with the transom and maybe you won't nedd to get a longer shaft engine?

http://www.cook-mfg.com/

Great VFM and with the $ so weak you can get a bargain!!!

I wouldn't recomend those lifters at all - what makes you suggest those codders? They are only for use on flat lakes in the US - the only ones worth getting are the Stainless Marine ones - much stronger and not a lot more money!
__________________

__________________
Cookee
Originally Posted by Zippy
When a boat looks that good who needs tubes!!!
Cookee is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 17:56.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.