General Specifications
HP / kW 25 HP / 18.6 kW
Displacement 432 cc (26.4 cu in.)
Cylinders 2 (Inline)
WOT RPM Range Check Manual
Bore x Stroke 65 x 65.1 mm
Weight (Lightest) 57 kg / 126 lbs
Drive & Lower Unit
Gear Ratio 2.08:1
Shaft Options 15, 20
Propeller Style 9.25–11.25"
Maintenance Quick-Specs
Engine Oil Yamalube 4-Stroke
Oil Capacity 1.1 Liters
Gear Lube 370 ml
Spark Plug NGK DPR6EB-9
Fuel/Power Regular Unleaded 87 Oct
Identification
The serial number for the Yamaha F25 Portable EFI is typically found on a plate located on the transom bracket.