General Specifications
HP / kW 90 HP / 67.0 kW
Displacement 1522 cc (92.9 cu in.)
Cylinders 3 (Inline)
WOT RPM Range Check Manual
Bore x Stroke — x — mm
Weight (Lightest) 170 kg / 375 lbs
Drive & Lower Unit
Gear Ratio 2.33:1
Shaft Options 20", 25"
Propeller Style —
Maintenance Quick-Specs
Engine Oil Mercury OptiMax/DFI Oil
Oil Capacity See Manual
Gear Lube See Manual
Spark Plug NGK IZFR5J
Fuel/Power Regular 87 Oct
Identification
The serial number for the Mercury 90hp OptiMax is typically found on a plate located on the transom bracket.