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
Model FH491V
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)
Carburetor Float type
Cooling system Air-cooling
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

Maintenance data

Engine
Maximum speed 3500 ± 100 rpm
Idle speed 1500 ± 100 rpm
Cylinder compression 4.0 kg/cm2 (56 psi) at 500 rpm
Valve clearance
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 system
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.)
Ignition system
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
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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.

2 Comments

  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

  2. Looking for a replacement for FH491V-CS04-R (in a JD X300 42″ ride-on). Need shaft, base flange and muffler specs to match up to suitable alternate engine.

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