Kawasaki FH491V

Kawasaki FH491VThe 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.

General information

Engine Specifications
ModelFH491V
Type4-stroke, OHV, V-twin 90°
Displacement472 cm 3 (28.8 cu-in)
Max. horsepower17.3 PS (12.7 kW; 17.0 HP) at 3,600 rpm
Max. torque (crank PTO)
CarburetorFloat type
Cooling systemAir-cooling
Ignition systemElectronic spark ignition
Lubricating systemFull pressure with spin-on oil filter
Starting systemRecoil or electric starter
Charging system12 Volt – 13A with regulator
Fuel usedUnleaded gasoline (octane number 86 or higher)
Fuel consumption245 g/HPh
Cooling systemPressurized forced circulation type

Tightening torque specs

Tightening torque specs
Cylinder head25 Nm; 2.2 kg·m; 18.5 ft·lb
Connecting rod6 Nm; 0.6 kg·m; 4.4 ft·lb
Flywheel56 Nm; 5.7 kg·m; 41.3 ft·lb
Crankcase cover25 Nm; 2.2 kg·m; 18.5 ft·lb
Intake manifold7 Nm; 0.7 kg·m; 5.2 ft·lb
Valve clearance lock nut7 Nm; 0.7 kg·m; 5.1 ft·lb

Maintenance data

Engine
Maximum speed3500 ± 100 rpm
Idle speed1500 ± 100 rpm
Cylinder compression4.0 kg/cm2 (56 psi) at 500 rpm
Valve clearance
Intake valve0.075-0.125 mm (0.003-0.005 in)
Exhaust valve0.075-0.125 mm (0.003-0.005 in)
Oil system
Oil type4-stroke or an equivalent (SF, SG, SH, or SJ )
Recommended oilSAE 10W-40, 10W-30, 5W-20
Oil capacity (with filter changed)1.7 litre (1.8 US.qt.)
Ignition system
Spark plugCHAMPION: RCJ8Y; NGK: BPMR6A
Spark plug gap0.75 mm (0.029 in)
Spark plug tightening torque22 Nm; 2.2 kg·m; 16.2 ft·lb
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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We try to use verified sources and official documentation, however, differences between sources or errors in entering information may occur. We do not provide advice on technical issues related to the engines operation or repair. We do not recommend using provided information for engines repairing engines or spare parts ordering, use only official service manuals and spare-parts catalogs.

1 Comment

  1. Hello i am looking for a carburetor for a Fh491v Kawasaki engine. Do you know where I can find one? Or at least have a part number

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