[quote=texastuma][quote=njcatman]I have been reading about marine grade bronze bushings, where they add aluminum to the mix to reduce corrosion. You have me thinking, though, that I can do it in all aluminum. I can buy 5/16" ID x 3/4" OD spacers that run from the fiberglass deck to the underside of the top of the crossmember. Basically, it will be a 3/4" diameter solid aluminum compression fitting in the crossmember, with the 5/16" bolt going through it. It means making larger holes in the crossmember (3/4"), but it will hold much better than the original. If all goes well, it will be stronger, easier and cheaper. The spacer will need to be in 2 piece to get it in, but the bold will hold it all together.[/quote]
Something you may consider is adding a section of aluminum inside the beam as a backing plate also. When you do install the bolts, us a good corrosion inhibitor paste/gel. I use Lanocote and Tuff Gel.[/quote]
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