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Go Back   SailNet Community > On Board > Gear & Maintenance > Outboard motor mount repair
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Thread: Outboard motor mount repair Reply to Thread
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Topic Review (Newest First)
06-21-2011 02:49 PM
Makai74 Thanks for the replies, guys! I really appreciate it.
06-21-2011 02:45 PM
mitiempo Exterior grade plywood uses waterproof glue as well, but the plies may have voids which Marine ply doesn't have. 2 Pieces of exterior ply (3/4") epoxy glued bad side to bad side and coated in epoxy before paint or varnish will work. Coat the edges well with epoxy - it will soak in so keep applying it until it doesn't absorb any more.
This is probably the least expensive solution.
06-21-2011 02:00 PM
MarkSF If you use plywood, you have to use marine grade. That's because it uses non-water soluble glue. If you can't find smaller pieces of marine ply (my local boatyard will supply pieces to size..) you could always use a hardwood - Teak, Elm, whatever. You might find a good lumber supplier who will cut it to your size.

I recently added an Elm reinforcement to my dinghy transom. It's as solid as a rock.

If you need to join two sheets to make it thicker, I'd use West System epoxy. Get plenty in there to keep the water out and clamp it while it sets. I also used several layers of epoxy, brushed on, on the outside of the wood to keep water out. Then you can either varnish or paint. You must do one or the other as the epoxy is not UV resistant, so the varnish or paint keeps the UV out.

What I did was use some off-the-shelf Elm 2ft x 3 inch x 1 inch pieces, placing one layer vertically and one layer horizontally, using epoxy to bond the whole lot together, then bandsaw to shape. Yes I made my own plywood! Well it was inexpensive, and it looks great.
06-21-2011 01:49 PM
T37Chef You may consider one of these, allows to raise/lower the engine on the mount. Not cheap though, maybe you could find one on ebay, craigslist, or a local consignment shop such a Bacons & Assoc in Annapolis?

Defender.com Search Results: motor bracket



If you choose to fix the one you have, marine plywood coated with epoxy should last a very long time.
06-21-2011 01:25 PM
Makai74
Outboard motor mount repair

Hi Guys,

I own a Tanzer 7.5 and the piece of wood on the motor mount where you attach the motor disintegrated (dropping my new motor in the drink the day I took delivery, but that's another story ).

The dimentions to replace it are roughly 10" x 8.5" x 1.5"

Can I just cut two peices of 3/4 plywood and glue them together and varnish it?

Do I need to use marine plywood? (I've made some inqueries and was told I have to buy the whole sheet which seemed excessive).

Can I buy a piece of that plastic that they use for the more expensive motor mounts?

Any advice would be greatly appreciated! It's my first boat, and I consider myself pretty handy, but I've got a lot to learn about maritime standards of workmanship.

 
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