[rockfla]

Just adjusted the brakes on my 39 Mercury, a 3/4 OFFSET box wrench works best in conjunction with a medium sized adjustable as the center pin of the adjuster is TOO small of a box wrench to most likely give you enough leverage to turn the adjuster!!!! ALSO you "may want to squirt a little WD40 (or lubricant of choice) around the upper adjuster/eccentric as those tend to get "crusty" and hard to turn!!!! Some pre lubricating will also help!!!!