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 Post subject: jack plate
PostPosted: 20 Sep 2018, 23:16 

Joined: 24 Dec 2011, 22:06
Posts: 963
Location: 72032
I've decided to try a home-made manual jack plate. 4" angle aluminum, some stainless fasteners, and some scrap oak plywood glued together to make the motor board. I have the concept down and have everything cut and put together as a mockup. My question is.....on the wood. What do you guys do to seal the wood so that it doesn't soak up water? I will be trying it with my little 25 yamaha on war eagle boat, if that makes any difference.


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 Post subject: jack plate
PostPosted: 21 Sep 2018, 06:54 

Joined: 29 Dec 2011, 17:29
Posts: 638
You can seal it with epoxy, after you drill all your holes make sure you get the epoxy into them as well, then you will want to paint over the epoxy with a good enamel paint. Epoxy doesn't hold up well with UV exposure and will get dull and flat.


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 Post subject: jack plate
PostPosted: 22 Sep 2018, 06:19 

Joined: 16 Mar 2017, 09:02
Posts: 118
Location: Chatham, Ontario
I use the West System epoxy because it is more flexible. Then I spray polyurethane colour paint or clear coat depending on if the wood is seen or not.


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 Post subject: jack plate
PostPosted: 24 Sep 2018, 21:14 

Joined: 05 Oct 2008, 12:14
Posts: 4141
Location: Algonquin Il
Is the oak plywood made with waterproof glue?
I'd recommend the Old Timers formula to seal the plywood.



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 Post subject: jack plate
PostPosted: 24 Sep 2018, 22:12 

Joined: 24 Dec 2011, 22:06
Posts: 963
Location: 72032
lckstckn2smknbrls wrote:
Is the oak plywood made with waterproof glue?
I'd recommend the Old Timers formula to seal the plywood.



Do not know. It was left over material from a cabinet shop. Red oak. Harder than hammered you know what; hard to even cut the stuff. What is the "old timers formula"?


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 Post subject: jack plate
PostPosted: 24 Sep 2018, 22:56 

Joined: 05 Oct 2008, 12:14
Posts: 4141
Location: Algonquin Il
It's a home made mix of mineral spirts, spar varnish or spar urethane and Boiled linseed oil.
Do search on the site.
If the plywood is not made with waterproof glue it's going to delaminate no matter how well it's sealed.



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 Post subject: jack plate
PostPosted: 25 Sep 2018, 01:20 
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Joined: 14 Aug 2016, 22:25
Posts: 1481
Location: Clayton California
Typical cabinet grade hardwood ply is not going to use waterproof glue. I don't want to be a downer, but would not use it on a transom (sorry). :(



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