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
Model FC420V
Type 4-stroke, OHV, single cylinder
Displacement 423 cm 3 (25.81 cu-in)
Max. horsepower 14.1 PS (10.4 KW; 14.0 HP) at 3,600 rpm
Max. torque 30.6 Nm (3.12 kg·m; 22.58 ft·lb) at 2,400 rpm
Carburetor Float type with fixed main jet
Cooling system Forced-air
Ignition system Flywheel magneto transistor type
Lubricating system Full pressurized
Starting system Recoil or electric starter
Fuel used Unleaded gasoline (octane number 86 or higher)
Fuel tank capacity
Fuel consumption 255 g/HPh
PTO shaft rotation Counterclockwise (from PTO shaft side)

Dimensions and Weight

Kawasaki FC420V
Length 448 mm (17.6 in)
Width 423 mm (16.7 in)
Height 436 mm (17.2 in)
Dry weight 35.2 kg (77.6 lbs)

Cylinder Block and Head

Cylinder block
Compression ratio: 8.4:1
Cylinder bore: 89.0 mm (3.5 in)
Piston stroke: 68.0 mm (2.68 in)
Cylinder internal diameter (standard): 89.076 mm (3.5069 in)
Number of piston rings (compression / oil): 2/1
Connecting rod big end diameter (standard): 41.068 mm (1.6168 in)
Connecting rod small end diameter (standard): 22.059 mm (0.8685 in)
Piston pin diameter: 21.977 mm (0.8652 in)
Side clearance (Top): 0.170 mm (0.0067 in)
Side clearance (Second): 0.150 mm (0.0059 in)
Side clearance (Oil): 0.200 mm (0.0079 in)
Ring end gap (Top): 0.900 mm (0.0354 in)
Ring end gap (Second): 0.900 mm (0.0354 in)
Ring width (Top): 1.940 mm (0.0764 in)
Ring width (Second): 1.940 mm (0.0764 in)
Crankshaft main journal diameter: PTO side: 34.919 mm (1.3748 in)
Magneto side: 34.945 mm (1.3758 in)
Crankpin journal diameter: 40.928 mm (1.6113 in)
Crankshaft center distance: 34 mm (1.34 in)
Cylinder head
Valve arrangement: OHV
Valves: 2
Valve steam diameter (INTAKE): 6.930 mm (0.2728 in)
Valve steam diameter (EXHAUST): 6.915 mm (0.2722 in)
Valve spring free length (INTAKE): 37.5 mm (1.4764 in)
Valve spring free length (EXHAUST): 37.5 mm (1.4764 in)
Camshaft lobe height (INTAKE): 36.750 mm (1.4468 in)
Camshaft lobe height (EXHAUST): 36.750 mm (1.4468 in)
Camshaft journal diameter: Gear side: 20.912 mm (0.8233 in)
Cam side: 19.912 mm (0.7839 in)

Service Information

Engine
Maximum speed 3,500 ± 100 rpm
Idle speed 1,500 ± 150 rpm
Cylinder compression 5.0 kg/cm2 (70 psi)
Valve clearance
Intake valve 0.15 mm (0.006 in)
Exhaust valve 0.15 mm (0.006 in)
Oil system
Oil type 4-stroke or an equivalent (SF, SE, SD)
Recommended oil SAE 10W-30, 10W-40
Oil capacity 1.3 L (1.4 US. qt)
Ignition system
Spark plug NGK: BPR5ES;
Spark plug gap 0.7-0.8 mm (0.028-0.031 in)
Ignition coil air gap 0.3 mm (0.012 in)

Tightening torque specs

Tightening torque specs
Cylinder head 52 Nm; 5.2 kg·m; 38.3 ft·lb
Connecting rod 20 Nm; 2.0 kg·m; 14.7 ft·lb
Flywheel 137 Nm; 14 kg·m; 101 ft·lb
Crankcase cover 26 Nm; 2.6 kg·m; 19.2 ft·lb
Oil drain plug 23 Nm; 2.3 kg·m; 16.7 ft·lb
Valve clearance lock nut 20 Nm; 2.0 kg·m; 14.7 ft·lb
ATTENTION! Dear visitors, this site is not a trading platform, an official dealer or a spare parts supplier, so we do not have any price lists or spare parts catalogs. We are an information portal and provide the technical specifications of gasoline and diesel engines.

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.

7 Comments

  1. I have one of these 14 hp electric start Kawasaki engines that I bought 20 years ago that came with a DR field and brush mower. The DR mower wore out, but not this Kawasaki. I saved this excellent engine and mounted it on an old Bunton mower. Still running fantastic, no maintenance needed beyond oil and filter changes. I’m a Kawasaki fan.

  2. what would cause Kawasaki fc420v engine smoke?
    This engine has been sitting for several years. One pull and started right up!

  3. Anyone knows wich other engine brand and model would repeplace a dead FC420V engine on a Kubota T1460?
    Thanks

Leave a Reply

Your email address will not be published.


*