Notices
The Boating Forum

Drill fill Redrill help.

Old 09-15-2020, 08:26 PM
  #1  
Junior Member
Thread Starter
 
Join Date: Sep 2020
Location: Ontario Canada
Posts: 7
Received 0 Likes on 0 Posts
Default Drill fill Redrill help.

Does anyone have experience with drill fill redrill technique on thr wood transom? I am hoping to do this with materials i have on hand:
-isopoly resin
-cabosil
-milled fibers
I know this is typically done with epoxy but if anyone has had success with poly and materials i listed above i am especially interested in hearing from you and what experiences you may have had.
Is it possible to use polyresin with success here? If so what ratios would one recommend mixing at?
I am hoping to have longevity holding my tower of power 115 outboard on the back of my glastron hpv165 boat and am not quite comfortable with this enough to move forward yet. This boat is going through a complete rebuild and this is a very important part i don't want to mess up,
Any help is greatly appreciated!

Last edited by theboatfloat; 09-15-2020 at 10:49 PM.
Old 09-15-2020, 08:31 PM
  #2  
Senior Member
 
Join Date: Apr 2019
Location: Central Florida, East Coast
Posts: 450
Received 106 Likes on 74 Posts
Default

You need to either join the admirals club or have 10 posts under your belt before you can include pics.
Old 09-15-2020, 08:32 PM
  #3  
Junior Member
Thread Starter
 
Join Date: Sep 2020
Location: Ontario Canada
Posts: 7
Received 0 Likes on 0 Posts
Default

Ok thankyou for that info.
Old 09-15-2020, 08:41 PM
  #4  
HTJ
Senior Member
 
Join Date: Jun 2013
Location: Baytown, TX
Posts: 12,118
Received 3,590 Likes on 2,218 Posts
Default

Break it in to sentences and paragraphs, kinda hard to read.
Old 09-16-2020, 08:42 AM
  #5  
Admirals Club Admiral's Club Member
 
Join Date: Dec 2008
Location: Eastern NC
Posts: 1,308
Received 190 Likes on 103 Posts
Default

Never done it for motor bolts. But the technique is drill the hole twice as big as your bolt, then fill with thickened epoxy, then drill through the center of your epoxy plug, thus preventing water intrusion into transom. Works well for transducer mounting, swim ladder, etc. My concern for engine mounting would be the diameter of the hole and potential slumping of the thickened epoxy. I used the west 6/10 for smaller applications and that was super easy. May want a thicker mix than that for what you are doing.

Also make sure you use big enough washers (or a trasom support plate even better) to engage the fiberglass transom outside of your epoxy plug, wouldn't want to rely on just epoxy to hold the bolts. I'd also say it may be overkill for top bolts unless your transom sits waaay low. Top bolts should stay dry with standard sealant applied around bolts.

As for the poly resin vs epoxy, I would think both would prevent water intrusion, just again, make sure your washers are pulling against wood/glass

Last edited by bluejack; 09-16-2020 at 09:02 AM.
Likes:
Old 09-16-2020, 11:38 AM
  #6  
Junior Member
Thread Starter
 
Join Date: Sep 2020
Location: Ontario Canada
Posts: 7
Received 0 Likes on 0 Posts
Default

Thankyou very much for your input, I unfortunately have already cut the wholes larger every one so i will be going forward with the technique but you made a good point about the top bolts not really being in the water.
I will go forward with the poly then and definitely get mounting plates on inside and outside of the transom to makesure it has something to even out the force along the wood and not the plugs.

Old 09-16-2020, 12:32 PM
  #7  
Junior Member
Thread Starter
 
Join Date: Sep 2020
Location: Ontario Canada
Posts: 7
Received 0 Likes on 0 Posts
Default

Hmm just another thought, has anybody ever attempted to use coosa board for transom plugs inplace of the poly resin or epoxy plugs? Would make them more structural then resin or epoxy i would think.
Old 09-16-2020, 12:58 PM
  #8  
Admirals Club Admiral's Club Member
 
Join Date: Jan 2020
Posts: 91
Received 26 Likes on 21 Posts
Default

I drilled oversized then glued in g10 tube with the same ID as the bolt OD. Just for the motor and bow/stern eyes. Things under less stress I just drill and then epoxy coat the exposed edges.

Old 09-19-2020, 10:44 AM
  #9  
Junior Member
Thread Starter
 
Join Date: Sep 2020
Location: Ontario Canada
Posts: 7
Received 0 Likes on 0 Posts
Default

Originally Posted by joeballow View Post
I drilled oversized then glued in g10 tube with the same ID as the bolt OD. Just for the motor and bow/stern eyes. Things under less stress I just drill and then epoxy coat the exposed edges.
That's a great bit of info thankyou for sharing! I like the idea of the g10 tube glued in structural holes, would you happen to recall your supplier, i am in Ontario Canada and cant seem to find any at the box stores, and suggestions will be very much appreciated, Thanks!
Old 09-20-2020, 09:10 PM
  #10  
Admirals Club Admiral's Club Member
 
Join Date: Jan 2020
Posts: 91
Received 26 Likes on 21 Posts
Default

Originally Posted by theboatfloat View Post
That's a great bit of info thankyou for sharing! I like the idea of the g10 tube glued in structural holes, would you happen to recall your supplier, i am in Ontario Canada and cant seem to find any at the box stores, and suggestions will be very much appreciated, Thanks!
I used mcmaster-carr, not sure if they supply Canada. Here's the page: https://www.mcmaster.com/tubing/grade~g-10-fr4/

I got a 42" piece of 1/8" Wall Thickness, 3/4" OD, 1/2" ID. This worked for my engine mounting bolts and the bow and stern eye bolts. Glued in with epoxy.

Here's a pic after I trimmed 2 of the 4 to length after the epoxy cured.



Likes:

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 On
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.