General Specifications
HP / kW 4 HP / 3.0 kW
Displacement 139 cc (8.5 cu in.)
Cylinders 1 (Inline)
WOT RPM Range Check Manual
Bore x Stroke 62 x 46 mm
Weight (Lightest) 27 kg / 60 lbs
Drive & Lower Unit
Gear Ratio 2.08:1
Shaft Options 15", 20"
Propeller Style 7-8"
Maintenance Quick-Specs
Engine Oil Yamalube 4-Stroke
Oil Capacity 0.6 Liters
Gear Lube 100 ml
Spark Plug NGK CR6HSB
Fuel/Power Regular Unleaded 87 Oct
Identification
The serial number for the Yamaha F4 Portable is typically found on a plate located on the transom bracket.