The Kawasaki FH491V is a 472 cc (28.8 cu-in) V-twin 90° air-cooled 4-stroke internal combustion small gasoline engine with vertical shaft, manufactured by Kawasaki Heavy Industries LTd., for general-purpose applications.
The FH491V has vertical PTO shaft; V-twin 90° design with cast iron cylinder liners and overhead valves (OHV). The engine is equipped with float type carburetor with fixed main jet; pulse type fuel pump and electronic spark ignition system. The Kawasaki FH491V uses a full pressure lubrication system with spin-on oil filter.
The engine uses an automatic compression release (ACR) system and recoil or electric starter (12V solenoid shift starter or bendix starter are available as an option).
Cylinder bore and the piston stroke is 68 mm (2.68 in) and 65 mm (2.56 in), respectively. The Kawasaki FH491V produced 17.3 PS (12.7 kW; 17.0 HP) at 3,600 rpm of horsepower.
|Type||4-stroke, OHV, V-twin 90°|
|Displacement||472 cm 3 (28.8 cu-in)|
|Max. horsepower||17.3 PS (12.7 kW; 17.0 HP) at 3,600 rpm|
|Max. torque (crank PTO)||–|
|Ignition system||Electronic spark ignition|
|Lubricating system||Full pressure with spin-on oil filter|
|Starting system||Recoil or electric starter|
|Charging system||12 Volt – 13A with regulator|
|Fuel used||Unleaded gasoline (octane number 86 or higher)|
|Fuel consumption||245 g/HPh|
|Cooling system||Pressurized forced circulation type|
Tightening torque specs
|Tightening torque specs||Cylinder head||25 Nm; 2.2 kg·m; 18.5 ft·lb|
|Connecting rod||6 Nm; 0.6 kg·m; 4.4 ft·lb|
|Flywheel||56 Nm; 5.7 kg·m; 41.3 ft·lb|
|Crankcase cover||25 Nm; 2.2 kg·m; 18.5 ft·lb|
|Intake manifold||7 Nm; 0.7 kg·m; 5.2 ft·lb|
|Valve clearance lock nut||7 Nm; 0.7 kg·m; 5.1 ft·lb|
|Maximum speed||3500 ± 100 rpm|
|Idle speed||1500 ± 100 rpm|
|Cylinder compression||4.0 kg/cm2 (56 psi) at 500 rpm|
|Intake valve||0.075-0.125 mm (0.003-0.005 in)|
|Exhaust valve||0.075-0.125 mm (0.003-0.005 in)|
|Oil type||4-stroke or an equivalent (SF, SG, SH, or SJ )|
|Recommended oil||SAE 10W-40, 10W-30, 5W-20|
|Oil capacity (with filter changed)||1.7 litre (1.8 US.qt.)|
|Spark plug||CHAMPION: RCJ8Y; NGK: BPMR6A|
|Spark plug gap||0.75 mm (0.029 in)|
|Spark plug tightening torque||22 Nm; 2.2 kg·m; 16.2 ft·lb|