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#2
09-16-2009, 07:45 AM
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Stainless Marine out of Miami has nice aluminum backing plates that have two holes (so they catch two bolts). I agree it needs some backing plates I am not sure about hole spacing on their aluminum plates. Looking good. You have a delimma there on the filler piece. I elected to go with a stand alone ladder and save the trouble of the swim platform to hull mating issue. I am curious now...
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#3
09-16-2009, 08:24 AM
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Agreed, definetly do the large stainless washers at least on the inside. Any stock you can up and drill yourself(stainless or aluminum) would be best with the washers. Also fill the gap with your preference and bolt the sides also.
the forces on that transom especially under way with that 500lb engine bouncing in the water is tremendous and I think you may be underestimating it.
__________________
Willy 1986 V20 Old School 1992 V20 1992 150 Yamaha 1997 HydraSport 2250 Vector 2009 17' G3 Outfitter "G Spot" http://www.youtube.com/watch?v=TDebw...eature=related "I won't be wronged, I won't be insulted and I won't be laid on a hand on. I don't do these things to others and I require the same from them" JW
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#4
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I am in agreement with the guys here, If you cannot locate any aluminium bars you can consider using a 3/4 plywood to fill in the entire area resin it to the inside skin and use longer bolts with washers, all the stress and weight is condense to this inside skin pressing outwards, it will not hurt to add the ply, If i remember correctly every 3/4 ply with mat and resin on it gives you 1500 lbs of support in a 3'x3' square ?
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#5
09-16-2009, 10:17 AM
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See the pic for what I did on the dually. Not pretty, but that bracket was on there nice and solid and the aluminum helped distribute the stress. The aluminum was just some scrap Kamikaze had laying around and gave to me. I just cut it to size and drilled holes where needed.
__________________
 1990 Hydrasports 2000cc Vector with 96 200HP Oceanrunner. Saved by grace alone, through faith alone, in Christ alone http://www.providencerpchurch.com/
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#7
09-16-2009, 12:40 PM
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Like every one else says put some backing washers on there!!
your right that the sides do not hold much, but after getting your fishing line and stuff caught in that gap you will want to fil with something!! This is the inside of my transom, 3x 1/2 steel welded and drilled the same as the bracket. coated with some zinc paint 
__________________
1986 V20  Old Fishermen never die, we just SMELL that way!!
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