Kawasaki FE120

Kawasaki FE120The Kawasaki FE120D / FE120G is a 124 cc (7.57 cu-in) natural aspirated single-cylinder four-stroke air-cooled internal combustion small gasoline engine with a horizontal shaft, manufactured by Kawasaki Heavy Industries LTd for general-purpose applications.

A 60.0 mm (2.36 in) cylinder bore and 44.0 mm (1.73 in) piston stroke give the FE120 engine a total of 129 cc of displacement. The compression ratio rating is 8.5:1.

The FE120 engine produced 4.1 PS (3 kW; 4.0 HP) at 3,600 rpm of maximum horsepower and 7.6 Nm (0.78 kg·m; 5.61 ft·lb) at 2,800 rpm of peak torque.

The Kawasaki FE120 features:

  • Cast iron cylinder liner
  • OHV (overhead valve) design
  • Float, butterfly type carburetor with fixed main jet
  • Flywheel magneto transistor type ignition system
  • Mechanical fly-weight type governor
  • Splash type lubrication system
  • Forced air cooling system
  • Recoil starter with ACR or electric starter
  • The FE120G model with 1/2 cam gear reduction

General information

Engine Specifications
Engine model FE120D / FE120G
Engine type 4-stroke, single-cylinder, OHV
Displacement 124 cm3, (7.57 cu·in)
Max. horsepower 4.0 PS (3 kW; 4.0 HP) at 3,600 rpm
Max. torque 7.6 Nm (0.78 kg·m; 5.61 ft·lb) at 2,800 rpm
Cooling system Forced air
Air cleaner Dual-type or oil bath type (optional)
Lubricating system Splash type
Ignition system Flywheel magneto transistor type
Carburetor Float, butterfly type with fixed main jet
Fuel tank capacity 2.5 liters (2.64 US.qts, 2.2 Imp. qts)
Fuel consumption 250 g/HPh
Fuel used Regular gasoline
Starting system Recoil starter with ACR or electric starter
Governor Mechanical fly-weight type governor
PTO shaft rotation Counterclockwise (from PTO shaft side)
Dimensions (L x W X H) 291 x 349 x 344 mm (11.46 x 13.43 x 19.54 in)
Dry weight 14.5 kg (32.0 lbs)

Cylinder Block and Head

Cylinder block
Compression ratio: 8.5:1
Cylinder bore: 60.0 mm (2.36 in)
Piston stroke: 44.0 mm (1.73 in)
Cylinder internal diameter (max): 60.067 mm (2.3648 in)
Number of piston rings (compression / oil): 2/1
Connecting rod big end diameter (max): 26.052 mm (1.0257 in)
Connecting rod small end diameter (max): 14.042 mm (0.5528 in)
Piston pin diameter (min): 13.975 mm (0.5502 in)
Side clearance (Top): 0.150 mm (0.0059 in)
Side clearance (Second): 0.120 mm (0.0047 in)
Piston ring end gap (Top): 1.000 mm (0.0390 in)
Piston ring end gap (Second): 1.000 mm (0.0390 in)
Piston ring end gap (Oil): Visual Inspection
Piston ring thickness (Top): 1.420 mm (0.0560 in)
Piston ring thickness (Second): 1.420 mm (0.0560 in)
Crankshaft journal diameter (min): 19.930 mm (0.7846 in)
Crankshaft crankpin diameter (min): 25.944 mm (1.0214 in)
Cylinder head
Valve arrangement: OHV (overhead valves)
Valves: 2
Valve steam diameter (INTAKE): 5.430 mm (0.2138 in)
Valve steam diameter (EXHAUST): 5.415 mm (0.2132 in)
Valve spring free length (INTAKE): 31.8 mm (1.2520 in)
Valve spring free length (EXHAUST): 31.8 mm (1.2520 in)
Valve guide bore (INTAKE): 5.562 mm (0.2190 in)
Valve guide bore (EXHAUST): 5.562 mm (0.2190 in)
Camshaft journal diameter: PTO side: 22.927 mm (0.9026 in)
Flywheel side (FE120D): 22.927 mm (0.9026 in)
Flywheel side (FE120G): 29.930 mm (1.1783 in)

Tightening torque specs

Tightening torque specs
Connecting rod bolt 12 Nm; 1.2 kg·m; 9 ft·lb
Cylinder head bolt 25 Nm; 2.5 kg·m; 17 ft·lb
Flywheel nut 64 Nm; 6.5 kg·m; 47 ft·lb
Rocker arm lock nut 7 Nm; 0.7 kg·m; 6 ft·lb
Crankcase cover 10 Nm; 1.0 kg·m; 7 ft·lb
Oil drain plug 32 Nm; 3.3 kg·m; 24 ft·lb
Spark plug 23 Nm; 2.3 kg·m; 17 ft·lb

Service Data

Maximum speed: 4,000 rpm
Idle speed: 1,600 rpm
Cylinder compression pressure
With recoil starter (min): 290 kPa (3.0 kg/cm2, 42 psi)
With electric starter (min): 390 kPa (4.0 kg/cm2, 57 psi)
Valve clearance
Intake valve clearance: 0.12 mm (0.0047 in)
Exhaust valve clearance: 0.12 mm (0.0047 in)
Oil system
Lubrication system: Splash type
Oil type: API SF, SG, SH, or SJ
Recommended oil: SAE 10W-30
Oil capacity: 0.6 liters (0.63 US.qts, 0.53 Imp. qts)
Ignition system
Type: Flywheel magneto transistor type
Spark plug: NGK BP5ES
Spark plug gap: 0.7-0.8 mm (0.028-0.031 in)
Contact breaker gap 0.25-0.40 mm (0.010-0.016 in)
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

ATTENTION! Dear visitors, this is an informational database of technical specifications, we are not a parts supplier or a marketplace.

We try to use official documentation and verify the published data, but errors may occur. In addition, specifications of machinery and equipment may vary depending on markets and modifications. We do not recommend the use of this data for spare parts or repairs. Use official service manuals or parts catalogs for your product.

Be the first to comment

Leave a Reply

Your email address will not be published.