Recently I helped a friend check out a used 21’ walk-around power boat sitting on a nice aluminum trailer prior to purchase. Before towing the boat away, my friend and I checked a number of key areas. To start, we checked the bearings for grease; axles, frame, and springs for integrity; and tires for rot and air pressure. Then we tested the winch for smooth operation and the accompanying safety strap for freshness. We moved forward of the winch to examine the trailer light connector for pin configuration and cleanliness, ball size specification on the trailer tongue for proper fit, [...]