Been busy as a bee in spring over the last month. Just recently finished a project that had been delayed for more than a year. On top of normal boat stuff, this one took a bit of effort and time. Osprey's trailer has not been on the road for two years. The last several maintenance cycles for Osprey, was done by moving a floating dock around the boat, while it was on the lift. I needed to place the boat on the trailer, as I decided to have the boat compounded and waxed... So
The trailer is I-beam aluminum, with square aluminum pipe, between the outer beams. On top of the square pipe, are pipe of the same type, welded in place and the tops are made to the conformity of the hull. Bolted to these were galvanized steel brackets, that were bolted with steel fasteners, to the bunk boards. When I got the boat 6 years ago, the bunk boards were covered in carpet and the boat was next to impossible to load and unload, due to resistance. You literally had to sink the trailer, till the winch was almost wet. After realizing this, I cut the carpet away and purchased King Starboard 1/2" and cut to fit the top of the existing wood and fender-well wood. The Starboard was installed by countersinking holes, 1/4" and installing stainless steel carriage bolts coated in Tef-Gel, through the Starboard and through the existing wood bunk board, with S/S washers and nuts. The Starboard was then routed along all top edges, so as to have no sharp edges.
So now I needed the trailer to haul the boat and perform topside maintenance... Deferral had finally come to an end. The bunk boats were not all fastened to the steel L-brackets, as most had wasted away and the fasteners were all shot.
Step one: Sawzall and grinder, on my back under the trailer for a day and a half, cutting away the washed L-brackets and bolts and removal of the bunk boards.
Step two: Clean all aluminum surfaces of corrosion and clean up work area.
Step three: Buy new bunk board of the best clear and straight lumber that I could find. Purchase 1/4" aluminum L-brackets (on eBay), purchase stainless steel 3/8" carriage bolts, washers and nuts for the bunk boards and purchase 1/2" stainless steel bolts, washers and Nylock nuts to bolt the L-brackets to the trailer. Lastly, fabricate plastic spacers from mike bottles to use as a isolator, between the wood buns and the L-brackets (the wood stays wet for long periods of time and is what is the main culprit of corrosion of the metals around it).
Step four: Coated all brackets with Lanocote and all fasteners with Tef-Gel. Installed aluminum L-brackets to trailer with the 1/2" fasteners, clamped to bunks to trailer, to form hull curve, marked holes for bunk carriage bolts, then used a mortise bit to countersink holes in bunk boards and finished drilling holes to 3/8". Placed plastic spacers on top of L-brackets, then clamped bunk boards back to L-brackets, installed 3/8" carriage bolts, washers and nuts.
Step five: Drilled and reinstalled existing Starboard to tops of bunk boards, with existing stainless steel fasteners (coated in Tef-Gel).
Photos of the trailer work are in my C-Brats photo album.