The Specs for a 1979 115 HP Mercury Outboard

Mercury marine engines offer a wide range of motors for watercraft. The 1979 115 hp Mercury outboard engine was known as the Mercury model 1150 and provided lots of momentum for boating enthusiasts.

  1. Propellers

    • The 1979 Mercury outboard with 115 hp utilized propellers that were either three- or four-bladed units. The pitch for four-blade propellers measured between 18 and 24 degrees, while the three-blade propeller ranged between 11 and 21 degrees. The diameter for three-blade propellers was between 13 and 14 inches, and the four-blade propellers were 13 inches in diameter.

    Performance

    • 115 hp Mercury outboards in 1979 had a maximum wide open throttle of 5,300 rpm and a minimum wide open throttle of 4,800 rpm. Using the four-blade propeller resulted in a maximum optimal speed range between 55 and 64 mph.

    Construction

    • 1979 Mercury outboards with 115 hp used a gear ratio that measured 1.70 to 1. The engine was a two-stroke motor that featured a propeller hub with 15 splines.