How Do I Seal Holes In Transom At Jack Plate?

[Xtrema]

Seems pretty simple to bolt on the CMC jack plate, but cannot figure out the best way to seal the bolt holes on the bottom. It's on a double wall aluminum transom, and the bolts are 1/2 inch diameter in 5/8 inch diameter holes. The bolts are not centered in the holes, though. I've tried a rubber fender washer but that don't work.

 

[DJ]

Re: How Do I Seal Holes In Transom At Jack Plate?

Can you access the inside of that double wall?

 

[Bondo]

Re: How Do I Seal Holes In Transom At Jack Plate?

Plenty of 5200.............

 

[crab bait]

Re: How Do I Seal Holes In Transom At Jack Plate?

any good hardware store has bushing stock.. comes in different sizes,lenghts, an materials.. as in bronze ,brass, copper,plastic, aluminum.. any will do.. get 5/8's od to 1/2 id.. epoxy it in transom..<br /><br />it'll also prevent transom wood rot.. as it'll seal the hole as well .. unprotected transom holes is a major gateway for rot..

 

[oregonducker]

Re: How Do I Seal Holes In Transom At Jack Plate?

Definately 3M 5200. Excellent stuff but be careful, it will "seal" whatever it comes in contact with. Wear old clothes and rubber gloves if you have them. It's kind of like the Cholla (sp?) cactus down south. If you can see it it will get on you.

 

[Xtrema]

Re: How Do I Seal Holes In Transom At Jack Plate?

Yes. The four bolts go through the double wall. Two upper bolts are way above the water line at the top rail of the transom and are visible from the deck. Two lower bolts go through the double wall and also through a reinforcing member across the transom. This compartment is accessible from above through a hatch. The bolts are adjacent to some reinforcing plates that go between the transom and the hull bottom. We cannot spin the bolts, as the head of the bolt is right next to these triangular shaped plates. We can use a wrench to hold the bolts still, but cannot spin them.