Kawasaki FC420V

Kawasaki FC420VThe Kawasaki FC420V is a 423 cc (25.81 cu-in) single-cylinder air-cooled 4-stroke internal combustion small gasoline engine with vertical shaft manufactured by Kawasaki Heavy Industries LTd., for general-purpose applications.

The FC420V engine has an OHV (overhead valve) design; cast-iron cylinder liner; reciprocating balancer; float type carburetor with fixed main jet; flywheel magneto transistor type ignition system; mechanical governor; low tone muffler; recoil starter with an automatic compression release.

The engine uses semi cyclone type air cleaner with dual element; pressurized lubrication system and pulse type fuel pump. The Kawasaki FC420V could be equipped with electric starter and 12V (3A, 5A, 9A or 13A) charging coil.

A 89.0 mm (3.5 in) cylinder bore and 68.0 mm (2.68 in) piston stroke give the motor a total of 423 cc of displacement. Compression ratio rating is 8.4:1. The Kawasaki FC420V motor produced 14.1 PS (10.4 KW; 14.0 HP) at 3,600 rpm of horsepower and 30.6 Nm (3.12 kg·m; 22.58 ft·lb) at 2,400 rpm of torque.

General information

Engine Specifications
ModelFC420V
Type4-stroke, OHV, single cylinder
Displacement423 cm 3 (25.81 cu-in)
Max. horsepower14.1 PS (10.4 KW; 14.0 HP) at 3,600 rpm
Max. torque30.6 Nm (3.12 kg·m; 22.58 ft·lb) at 2,400 rpm
CarburetorFloat type with fixed main jet
Cooling systemForced-air
Ignition systemFlywheel magneto transistor type
Lubricating systemFull pressurized
Starting systemRecoil or electric starter
Fuel usedUnleaded gasoline (octane number 86 or higher)
Fuel tank capacity
Fuel consumption255 g/HPh
PTO shaft rotationCounterclockwise (from PTO shaft side)

Dimensions and Weight

Kawasaki FC420V
Length448 mm (17.6 in)
Width423 mm (16.7 in)
Height436 mm (17.2 in)
Dry weight35.2 kg (77.6 lbs)

Service Information

Engine
Maximum speed3,500 ± 100 rpm
Idle speed1,500 ± 150 rpm
Cylinder compression5.0 kg/cm2 (70 psi)
Valve clearance
Intake valve0.15 mm (0.006 in)
Exhaust valve0.15 mm (0.006 in)
Oil system
Oil type4-stroke or an equivalent (SF, SE, SD)
Recommended oilSAE 10W-30, 10W-40
Oil capacity1.3 L (1.4 US. qt)
Ignition system
Spark plugNGK: BPR5ES;
Spark plug gap0.7-0.8 mm (0.028-0.031 in)
Ignition coil air gap0.3 mm (0.012 in)

Tightening torque specs

Tightening torque specs
Cylinder head52 Nm; 5.2 kg·m; 38.3 ft·lb
Connecting rod20 Nm; 2.0 kg·m; 14.7 ft·lb
Flywheel137 Nm; 14 kg·m; 101 ft·lb
Crankcase cover26 Nm; 2.6 kg·m; 19.2 ft·lb
Oil drain plug23 Nm; 2.3 kg·m; 16.7 ft·lb
Valve clearance lock nut20 Nm; 2.0 kg·m; 14.7 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.

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