General Specifications
HP / kW 4 HP / 3.0 kW
Displacement 83 cc (5.1 cu in.)
Cylinders 1 (Inline)
WOT RPM Range Check Manual
Bore x Stroke — x — mm
Weight (Lightest) 21 kg / 46 lbs
Drive & Lower Unit
Gear Ratio —
Shaft Options 15", 20"
Propeller Style —
Maintenance Quick-Specs
Engine Oil Yamalube 2-M
Oil Capacity See Manual
Gear Lube See Manual
Spark Plug NGK BR7HS
Fuel/Power Regular 87 Oct (50:1 Mix)
Identification
The serial number for the Yamaha 4hp (2-Stroke) is typically found on a plate located on the transom bracket.