Kawasaki FH451V

Kawasaki FH451VThe Kawasaki FH451V is a 0.49 l (494 cc, 30.15 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 FH451V 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 a fixed main jet and pulse type fuel pump. The motor uses an electronic spark ignition system; full pressure lubrication system with spin-on oil filter and dual element air cleaner.

The engine has an automatic compression release (ACR) system with recoil or electric starter (12V solenoid shift starter or bendix starter are available as an option).

It has a 68.0 mm (2.68 in) cylinder bore and 68.0 mm (2.68 in) piston stroke. Compression ratio rating is 8.5:1. The Kawasaki FH451V produced 15.2 PS (11.2 kW; 15.0 HP) at 3,600 rpm of maximum horsepower and 34.6 Nm (3.5 kg·m; 25.5 ft·lb) at 2,400 rpm of torque.

General information

Engine Specifications
ModelFH451V
Type4-stroke, OHV, V-twin 90°
Displacement494 cm 3 (30.15 cu-in)
Max. horsepower15.2 PS (11.2 KW; 15.0 HP) at 3,600 rpm
Max. torque (crank PTO)34.6 Nm (3.5 kg·m; 25.5 ft·lb) at 2,400 rpm
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

Dimensions and Weight

Kawasaki FH451V
Length, mm (in)425 (16.7)
Width, mm (in)359 (14.1)
Height, mm (in)441 (17.4)
Dry weight, kg (lb)32 (70.5)

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 manifold6 Nm; 0.6 kg·m; 4.4 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 valve0.10-0.15 mm (0.004-0.006 in)
Exhaust valve0.10-0.15 mm (0.004-0.006 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)1.8 litre (1.9 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
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