( Continued from Page 106) marketing a line of marine diesel engines with hp ranging from 12 to 500. The new ... The new Mercury Mark 20 for 16 hp weighs only 72 pounds, carries reverse gear, alternate twin firing power head and remote fuel tank. ... The Murphy Diesel is a aquot;trueaquot; Diesel with unit fuel injection, four valves per cylinder, dual overhead camshafts and other proved design advantages. ... For dependable light and power on fishing craft, Onan electric plants fill the bill.