New outboard mount - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 04-07-2007
Senior Member
 
Join Date: Jan 2001
Posts: 494
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 14
Quickstep192 is on a distinguished road
New outboard mount


On my Quickstep, the 8hp outboard is mounted on a piece of teak about 20" long by 8" high by about 3/4" thick (see photo). Where the bracket clamps onto the teak, there's an additional piece about 4" high by 6" wide by 3/4" thick that doubles the thickness in that area. I've never felt good about the strength of that arrangement and as part of a plan to eliminate some of the teak from the boat, I'm thinking about replacing it. If I made a replacement by laying up multiple layers of fiberglass cloth with resin, would that be strong enough? Could I make it by encapsulating a piece of Coosa board? Any input is greatly appreciated.
Attached Thumbnails
New outboard mount-img_2509a.jpg  
Reply With Quote Share with Facebook
  #2  
Old 04-07-2007
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 9 Times in 9 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
Quickstep-

While I'm not too familiar with Coosa board, I would recommend that you use marine plywood instead. I believe Coosa board has a foam core and is not going to have the compressive strength or tensile strength that marine plywood is going to have. I also believe that marine plywood would be less expensive than Coosa board.

I would make the replacement outboard mounting board out of two pieces of 1/2" plywood, since that should have more than enough strength to support an 8 HP outboard.

I would make it by laminating the two pieces together with epoxy, and then screwing them together. After putting the screws in, I would glass over the whole thing using kevlar* cloth, to give it abrasion resistance and to encapsulate the wood and prevent water from causing any problems with it in the future.

When you drill the mounting holes, I would drill them oversized and fill them back in with thickened epoxy, to prevent the water from intruding through the fastener holes. You should paint or varnish the board to protect the epoxy from UV-degradation.

* If you're going to sand the board to finish it off, use a final outer cover of fiberglass, as kevlar is a bastard to sand—basically, it doesn't, since it is so abrasion resistant, it shreds and leaves little spikes sticking up all over instead.
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.

Last edited by sailingdog; 04-07-2007 at 09:59 PM.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Outboard Motor Mount bsteele Sabre 0 05-22-2006 07:30 AM
Caring for the Cruising Outboard Doreen Gounard Gear and Maintenance Articles 0 04-22-2003 08:00 PM
outboard Motor Mount reid5009 Gear & Maintenance 3 04-12-2003 07:29 PM


All times are GMT -4. The time now is 03:25 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.