The Kawasaki FC420V is a 423 cc, (25.8 cu·in) natural aspirated single-cylinder four-stroke air-cooled internal combustion small gasoline engine with a vertical shaft, manufactured by Kawasaki Heavy Industries LTd. for general-purpose applications.
The cylinder bore is 89.0 mm (3.5 in) and the piston stroke is 68.0 mm (2.68 in). The compression ratio rating is 8.4:1.
The Kawasaki FC420V engine produced 14.1 PS (10.4 kW; 14.0 HP) at 3,600 rpm of maximum output power and 30.6 N·m (3.1 kg·m, 22.6 ft·lb) at 2,400 rpm of peak torque.
The Kawasaki FC420V features:
- OHV design
- Cast-iron cylinder liner
- Flywheel magneto transistor type ignition system
- Float type carburetor with fixed main jet
- Diaphragm type pulse pump
- Mechanical flyweight governor
- Pressurized lubrication system
- Forced air cooling system
- Recoil or electric starter
General information
| Engine Specifications | |
| Engine model | FC420V |
| Engine type | 4-stroke, OHV, single-cylinder |
| Displacement | 423 cm3, (25.8 cu·in) |
| Max. horsepower | 14.1 PS (10.4 kW; 14.0 HP) at 3,600 rpm |
| Max. torque | 30.6 N·m (3.1 kg·m, 22.6 ft·lb) at 2,400 rpm |
| Cooling system | Forced air |
| Air cleaner | Semi-dry cyclone type with dual element |
| Lubricating system | Pressurized lubrication |
| Ignition system | Flywheel magneto transistor type |
| Fuel system | Float type carburetor with fixed main jet |
| Fuel consumption | 255 g/HPh |
| Fuel tank capacity | 5.0 liters (5.28 US.qts, 4.4 Imp. qts) |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
| Starting system | Recoil or electric starter |
| Governor | Mechanical flyweight |
| PTO shaft rotation | Counterclockwise) |
| Dimensions (L x W X H) | 448 x 423 x 436 mm (17.6 x 16.7 x 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) |
Tightening torque
| Tightening torque specs | |
| Cylinder head | 52 Nm; 5.2 kg·m; 38.3 ft·lb |
| Connecting rod bolt | 20 Nm; 2.0 kg·m; 14.7 ft·lb |
| Flywheel | 137 Nm; 14 kg·m; 101 ft·lb |
| Crankcase cover bolt | 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 adjust nut | 20 Nm; 2.0 kg·m; 14.7 ft·lb |
Service Data
| 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 clearance: | 0.15 mm (0.0059 in) |
| Exhaust valve clearance: | 0.15 mm (0.0059 in) |
| Oil system | |
| Lubrication system: | Pressurized lubrication |
| Oil type: | 4-stroke or an equivalent (SF, SE, SD) |
| Recommended oil: | SAE 10W-30, 10W-40 |
| Oil capacity: | 1.3 L (1.37 US. qt, 1.14 Imp. qt.) |
| Fuel system | |
| Type: | Float type carburetor with fixed main jet |
| Fuel Pump: | Diaphragm type pulse pump |
| Ignition system | |
| Type: | Flywheel magneto transistor type |
| Spark plug: | NGK BPR5ES, Champion RN11YC |
| Spark plug gap: | 0.7-0.8 mm (0.0276-0.0315 in) |
| Ignition coil air gap | 0.3 mm (0.0118 in) |
| Spark plug torque | 15 Nm (1.53 kg·m; 11.07 ft·lb) |
Applications
| Manufacturer or Brand | Models |
| Lawn tractors | |
| John Deere | 170, 175, 240, 245, GT242, LX172, LX176 |
| Kubota | T1460, T1560 |
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