Reply
 
Thread Tools Search this Thread
 
Old 16 February 2013, 21:40   #1
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,053
RIBase
Auxiliary mount bracket ply backing

I've got one of these (exact model) to hang the Yam 8hp 2 stroke aux for the Ballistic on.



It'll be held on by 8 M8 316 bolts through the transom.

I have a couple of small offcuts of 6mm 'Marine' 3 ply kicking around that are about the right dimensions for a backing pad where it's bolted to the transom.

1) Is 6mm 3 ply going to be enough or do I need to laminate the 2 pads together-or would I be better off using a chunk of the 18mm I have lying around?


2) Is there any real reason anyone can think of to have a ply internal pad as well or will a nice strip of 316 or penny washers be sufficient?
__________________
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 17 February 2013, 08:06   #2
Member
 
Festinghouse's Avatar
 
Country: UK - England
Town: Chorley / Holyhead
Boat name: Northwind Challenger
Make: Tornado
Length: 6m +
Engine: Mariner 115 efi CT
MMSI: 235080598
Join Date: Jun 2011
Posts: 1,411
RIBase
Send a message via Skype™ to Festinghouse
youve got a fair amount of weight in that engine and once youve jumped a few waves youll soon see how easily things break. use the 18mm ply, and use 10mm bolts with a spreader plate on the inside of the transom, or at the very least use big mud guard washers. if not you will find that the bolts will want to start pulling into, and then through the transom.
oh and if using 10mm bolts, id only use 4 or 6 instead of 8.
__________________
"Life may often suck, but the alternative is unacceptable"
MMSI Sticker
Festinghouse is offline   Reply With Quote
Old 17 February 2013, 11:12   #3
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,053
RIBase
Cheers

To be honest I'm not particularly happy at the prospect of having to fit a bracket at all, but the transom is too thick to put the Yam over.
__________________
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 17 February 2013, 11:34   #4
SPR
Member
 
SPR's Avatar
 
Country: UK - Scotland
Town: Central Belt of Scotland
Boat name: Puddleduck III
Make: Bombard
Length: 5m +
Engine: 50 HP
Join Date: Mar 2009
Posts: 2,066
Quote:
Originally Posted by Nos4r2 View Post
Cheers

To be honest I'm not particularly happy at the prospect of having to fit a bracket at all, but the transom is too thick to put the Yam over.
I read on here - the mount is least of your worries. The bracket usually goes !

I would get a local company to fabricate one that does not tilt - to your specs/ recommend. not so long etc.

S.
__________________
SPRmarine / SPRtraining
RYA Training Courses & Safety Equipment Sales
SPR is offline   Reply With Quote
Old 17 February 2013, 11:48   #5
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,053
RIBase
Therein lies the problem-the aux is a short shaft, so the bracket needs to drop.

It's a 20hp rated bracket, with an 8hp 2stroke on it that weighs the same as a 6hp, so hopefully I've avoided the bracket falling apart issues.
__________________
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 17 February 2013, 13:22   #6
Member
 
Festinghouse's Avatar
 
Country: UK - England
Town: Chorley / Holyhead
Boat name: Northwind Challenger
Make: Tornado
Length: 6m +
Engine: Mariner 115 efi CT
MMSI: 235080598
Join Date: Jun 2011
Posts: 1,411
RIBase
Send a message via Skype™ to Festinghouse
im about to fit one to mine, just remember not to rely on the catch, and use a strap to secure it tight (poss' around the a frame).
__________________
"Life may often suck, but the alternative is unacceptable"
MMSI Sticker
Festinghouse is offline   Reply With Quote
Old 17 February 2013, 14:16   #7
Member
 
AMac's Avatar
 
Country: UK - Scotland
Town: Dunoon
Boat name: Celtic Wanderer
Make: Ribcraft
Length: 9m +
Engine: Volvo D6, Honda
MMSI: 235087784
Join Date: Nov 2011
Posts: 205
hi
from personal experience of nearly loosing ob from same type of bracket i would say to you get rid of this alloy type and buy an all stainless type as they do not corrode like the alloy type
__________________
AMac is offline   Reply With Quote
Old 17 February 2013, 14:17   #8
Member
 
AMac's Avatar
 
Country: UK - Scotland
Town: Dunoon
Boat name: Celtic Wanderer
Make: Ribcraft
Length: 9m +
Engine: Volvo D6, Honda
MMSI: 235087784
Join Date: Nov 2011
Posts: 205
also make sure you have a safety strap fitted
it was the only thing that saved my ob from drowning
__________________
AMac is offline   Reply With Quote
Old 17 February 2013, 14:19   #9
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,053
RIBase
Quote:
Originally Posted by AMac View Post
hi
from personal experience of nearly loosing ob from same type of bracket i would say to you get rid of this alloy type and buy an all stainless type as they do not corrode like the alloy type

I would have, but couldn't find a stainless one rated to 20hp without spending a fortune. It's food for thought though-cheers.
__________________
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 17 February 2013, 14:27   #10
Member
 
AMac's Avatar
 
Country: UK - Scotland
Town: Dunoon
Boat name: Celtic Wanderer
Make: Ribcraft
Length: 9m +
Engine: Volvo D6, Honda
MMSI: 235087784
Join Date: Nov 2011
Posts: 205
bracket is still cheaper than new ob!!!!!!
__________________
AMac 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




All times are GMT. The time now is 02:45.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.