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Old 04-05-2016, 01:31 PM   #1
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Default Old Transducer Screws in Transom

Guys,

I had some small below the waterline screws from old transducers. This season I was going to remove the screws and seal them.

This is the method I was going to use -

1) Remove the old screws and clean the hole to ensure no moisture is inside
2) Fill hole with Boatlife Life Caulk
3) Use JB WaterWeld Epoxy Putty to seal the hole completely and sand flat

Thoughts?
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Old 04-05-2016, 01:52 PM   #2
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If its dry I ream it with a counter sink bit and pack it with resin soaked glass and finish with talc thickened putty working all the air out with a drill bit. Once set I sand and touch it up with matching gelcoat.
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Old 04-05-2016, 01:53 PM   #3
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Should work,.....I use MarineTex for that purpose. Not sure if it's the "best" way to go but it's worked so far.
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Old 04-05-2016, 02:01 PM   #4
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Thanks guys!
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Old 04-05-2016, 02:11 PM   #5
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Grab some West System 610 Six10 Thickened Epoxy Adhesive from West Marine or online, its a 2 part Epoxy Adhesive in a tube that you run through a caulking gun that mixes itself. Next, grab some West Systems #403 adhesive filler. Its microfibers aka Cabosil. Mix the Cabosil with the West systems Epoxy until its a thick paste. Enlarge the transducer hole one size with a drill bit so that the Epoxy has a fresh layer to stick too. Apply the paste until you can see it protruding from the opposite side of the hole. Done!!! You can store the epoxy adhesive in a tube and you will have it on hand for another simple repair as well as the Cabosil.
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Old 04-05-2016, 04:46 PM   #6
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Im lazy. I just shoot some 5200 in the hole and leave the screws in place. In my defence, I do wipe off the excess 5200...
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Old 04-05-2016, 06:27 PM   #7
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Enlarge the hole and countersink, wipe with acetone. Then fill West System 610 or thickened epoxy.
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Old 04-05-2016, 07:03 PM   #8
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the BoatLife Caulk and JB WaterWeld wouldn't be sufficient for small transducer screw holes?

Here are some shots of the holes in question...
Attached Images
  
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Old 04-05-2016, 07:45 PM   #9
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Quote:
Originally Posted by Landlocked97 View Post
Should work,.....I use MarineTex for that purpose. Not sure if it's the "best" way to go but it's worked so far.
X2, Comes in white or gray(closer to black). I buy the small marine-tex kit for small to medium jobs and mix the entire kit. Even if it's more than I need the paste consistency of the base makes it difficult to mix custom size batches and get the ratio perfect, which is important.
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Old 04-05-2016, 07:59 PM   #10
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Quote:
Originally Posted by Yrral3215 View Post
Im lazy. I just shoot some 5200 in the hole and leave the screws in place. In my defence, I do wipe off the excess 5200...
I'm in this camp as well.

"What should I fill this screw hole with?"
"How about...a screw. Yep, fits great!"
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Old 04-05-2016, 09:02 PM   #11
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I subscribe to the 'use the proper tool' school. I've bought two boats where owners thought 5200 was good for anything. I'd strangle those SOBs if I could find 'em. I'll never buy another boat that has 5200 on anything except two surfaces intended to be mated for-freakin-ever ...
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Old 04-05-2016, 09:10 PM   #12
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Ive never had a problem removing screws put in with 5200 but if you think you might need to remove it use 4200.

Other things with more surface area made me cuss like the old soldier I am
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Old 04-05-2016, 10:20 PM   #13
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1 I drill out hole with countersink bit

2 Screw in flat head Phillips countersunk screws about 3/16th below surface with Sika on the threads to seal.

3 Colour match gelcoat and add hardener and fill hole.

4 Stick flat pieces of plastic (from a blister pack product) over the fill and press into Phillips head screws to make it flat and level with surface. Leave a few hours to cure then remove.

5 Scrape flat any protruding gelcoat back to transom with small piece of hacksaw blade to avoid sanding.

Repairs are invisible from a reasonable distance..
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Old 04-06-2016, 06:21 PM   #14
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Removed the screws today, letting everything dry out over the next day or so, then will insert some 5200 into the holes and cap it with the WaterWeld.
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Old 04-06-2016, 11:00 PM   #15
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Another option, fill the holes, with whatever and throw a stern saver over them, then no more new drill holes in your transom.

It's very easy to fill the holes with thickened epoxy or marine tex. If you're doing the fix you might as well do it right so you never have to think about it again.
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Old 04-07-2016, 06:37 AM   #16
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Thanks, I do plan on placing a starboard transducer mount over the holes...
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Old 04-10-2016, 06:33 AM   #17
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Quote:
Originally Posted by T2A View Post
Another option, fill the holes, with whatever and throw a stern saver over them, then no more new drill holes in your transom.

It's very easy to fill the holes with thickened epoxy or marine tex. If you're doing the fix you might as well do it right so you never have to think about it again.
Here is an article I wrote about this topic a few years ago that may be of some help. The thickened epoxy we supply with our Stern Saver kit is perfect for filling and patching existing holes in your transom. Once you have filled the holes, just glue the Stern Saver on over them and you'll never see them again!
http://www.thehulltruth.com/stern-saver-llc/418439-stern-saver-retrofit-boats-already-have-transom-mount-transducers.html
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