by Bob Stearns
The fit between the ball hitch and the trailer coupler should be tight enough to prevent a disastrous decoupling while on the road, but not so snug that the trailer will have trouble making turns. Here’s how to achieve the perfect fit in just a few minutes.
Uncouple the trailer and insert a spare ball into the coupler (a). Close the coupler latch lever. If the fit is too loose, remove the ball, and tighten the spring-loaded nut (b) on the underside of the coupler.
Reinsert the ball and check the fit. Repeat the latter part of Step 1 until you get a fit that is snug but not so tight that you cannot move the ball by hand with reasonable effort. Rehitch the trailer.
From the April 2012 issue of Field & Stream magazine.