Compac 16 New Trailer Bunks

I believe these bunk boards were original with the trailer and dated back to 1984.  As you can see, the brown outdoor carpet they were covered with was deteriorating and covered with the red bottom paint from a previous paint job.  The starboard bunk board was also cracked, and I was worried it would eventually break as I was loading the boat onto the trailer.
I chose to replace the actual bunk boards with new, structural grade "green" treated 2x4s.  Since I intend to replace the brown rubrail and waterline stripe with navy, I chose blue outdoor carpet for the bunks and keel guides (the soft, not "grassy" outdoor carpet).  I also replaced the 1" lag screws on the bunks with 1/4" bolts running horizontal through the 2x4s - I used the existing 1" lag screws vertically through the bottom of the bracket.  I chose not to replace the keel guide boards, but I did rotate them 180 degrees and move them to opposite sides of the trailer so that I could avoid mounting the keel guides with the existing holes.  To avoid a bolt head on the inner side of the keel guide, I replaced the 1" lags with 2 1/4" lags horizontally.  You'll also notice that I painted the fenders blue to match the bunk boards, keel guides, and, eventually the rest of the trim and striping on the boat.

Dropping the bunks to replace the boards was somewhat tricky.  While the bunks provide stability for the boat, the keel rollers handle the actual weight of the boat.  First, I carefully marked the height of the bunk boards on the bunk-support (round tube that secures the bunk to the trailer).  I then jammed two 2x3 braces under the rubrails to support the boat while I carefully loosened and dropped the bunks and replaced them.  Then I used a sissor-jack under the bunk support to jack the bunk back into place, and tightened the bolts back up.