1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 6Get this manual
General Specification NOTE: Other specification (torques, etc are listed in the respective sectionsModel 70 Horsepower Idle RPM (in forward gear) Full Throttle RPM Range Piston Replacement Cylinder Bore Stroke Engine Type Ignition Type Recommended Spark Plug Cylinder Firing Order Recommended Power Trim Fluid Recommended Gasoline Recommended Oil Engine Weight ELO ELOPT 70 (52.2 kw) Model 75 75 (55.9 kw) 47505250 71.12 (1165.7cc) 3.375 (85.7mm) 2.65 (67.3mm) Cylinder, Cycle C.DBreakerless NGK-BUHW-2 or AC-V40 FFK or Champion L78V Inductor Plugs: NGK-BUZHW-2 or Champion QL78V Model 80 80 (59.6 kw) Model 90 90 (67.1 kw) 50005500
1-3-2 Quicksilver Power TrimSteering Fluid or Automotive Transmission Fluid (ATF) Type F, FA or Dexron II Regular Leaded, Premium, Low-Lead and Lead-Free automotive gasolines with minimum pump posted octane rating of 86 Quicksilver TC-WII or TC-W3 2-Cycle Outboard Oil 260 lbs280 lbs6.6 U.SGallons (5 ImpGals 25 Liters) 22.5 floz(665.3ml) 80:1 50:1 2.3:1 gal(3.78 liter) hours qt(.95 liter) Hour