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Diesel Dan

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Mar 12, 2011
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Location
Alabama
I started on my transom rebuild this weekend. Removed all the old rotten wood and cleaned up behind it. Patched some holes up and removed the transducer. The wife picked me up some outdoor grade plywood at Lowes. (a benifit of her working there) cut 2 pieces of 1/2'' and glued them together with Dap contact cement and cut the backside piece of 3/4", Put on the first coat of Minwax Spar Urathane. It should be solid as a rock when complete I sure hope it is. Also bought the stainless steel hardware. Had to convince myself that was worth the price seeing how I have loads of regular bolts in my service truck but I finally decided to spend the 30 bucks on it and be done with it. I hope that this is solid enough for the 20hp merc. The original transom was kinda scary lookin' and now I have a brand new motor I figure I better beef it up so I don't have ti fish it out of the river. I was kind of nervous about removing the brace that is riveted to the floor but I bought some 5200 sealant and plan to use my last bit of green stick epoxy stuff I got from cabelas to seal her back off. I will post picks when complete next weekend, For now I have to go back out of town and make the bacon.
 
Sounds like your on the right track. =D> If you go to McMasters Carr, you can order solid rivets to replace the ones that you removed. Then you won't need to use 5200 or any other sealant. All that is needed is a couple hammers to do a couple rivets. :wink:

Oh yeah... post up some photos too, as we love boat porn around here.
 
thanks Perchin, hey I see your a towerhand. I did that for 11yrs it was a lot of fun and a lot of work. I turn wrenches now. I am to fat to climb anymore, used to be able to climb 100 ft at a time now 20 feet would likely kill me.
 
I learned on this site that one should not use "treated lumber " on an aluminum boat. Noted your comment
"outdoor grade plywood at Lowes."....just wondered if you are using the dreaded "treated lumber" by mistake. Rich
 
Diesel Dan said:
thanks Perchin, hey I see your a towerhand. I did that for 11yrs it was a lot of fun and a lot of work. I turn wrenches now. I am to fat to climb anymore, used to be able to climb 100 ft at a time now 20 feet would likely kill me.

Was a towerhand 8 years ago
Was a tophand 4 years ago
Was a foreman 2 years ago
Now days am just getting fat in the office :lol:

I know what you mean about the 100ft. at a time thing... I can only wish I can get back to that kind of condition. 20ft is about all for me too now days. :mrgreen:
 
Rich, what they mean by outdoor plywood or at least as far as I can tell is that one side is sanded. I guess the sanded side repels water better than the unsanded side. Don't guess it makes any differance when you seal the whole thing in urathane but thats what I got anyway. The unsanded side soaked up my contact cement that I glued the two boards together with like a sponge. I actually had to pull them back apart and put some more glue in there because there was not enough glue to stick them together after it was absorbed. I think the result is going to be good. Beings I have to go out of town this week, the glue will have a week at least to cure. Going to Baton Rouge LA which is nice they have a BassPro,Cabelas,and an Acadamy within 20 miles or so of my hotel.
 
What you described doesn't sound "treated" to me at all.

As I understand it...."Treated lumber" is the somewhat green, heavy lumber (normally in 2 x4 2x 6 2 x 10 etc.) though some decking lumber is also "treated". It has both arsenic and copper in it. Those two chemicals are what makes it resist rotting and deteriorating as much as non-treated lumber does. It also makes it very heavy.

It is the copper that adversely react with aluminum... dissimilar metals...no surprise that that would be a problem.
I knew NOTHING about this topic until I started reading here. Someone mentioned that the "new" treated lumber was OK,... according to their lumber yard. The guy's boat mechanic disagreed, which caused me to Google it. The article LINKED below is what I found.

regards, rich

https://joneakes.com/jons-fixit-database/2049-OVERVIEW-Living-with-Pressure-Treated-Wood
 
didnt say treated, what I got was regular plywood sanded on one side which the lumber gurus at lowes says makes it outdoor grade.
 

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