Kawasaki FJ100D

Kawasaki FJ100DThe Kawasaki FJ100D is a 0.1 l (98 cc, 5.98 cu-in) single-cylinder air-cooled 4-stroke internal combustion small gasoline engine with horizontal shaft manufactured by Kawasaki Heavy Industries LTd., for general-purpose applications.

The FJ100D engine has an OHV (overhead valve) design; cast iron cylinder liner; float type carburetor with fixed main jet; flywheel magneto transistor type ignition system; mechanical governor and recoil starter with an automatic compression release. The engine uses semi-wet type air cleaner.

Bore and stroke are 56.0 mm (2.2 in) and 40.0 mm (1.57 in), respectively. Compression ratio rating is 8.3:1. The Kawasaki FJ100D motor produced 3.0 PS (2.2 kW; 3.0 HP) at 3,600 rpm of maximum horsepower (SAE J1349 Net power is 2.5 HP; 1.9 kW) and 4.9 Nm (0.5 kg·m; 3.6 ft·lb) at 2,400 rpm of torque.

General information

Engine Specifications
Model FJ100D
Type 4-stroke, OHV, single cylinder
Displacement 98 cm 3 (5.98 cu-in)
Max. horsepower 3.0 PS (2.2 KW; 3.0 HP) at 3,600 rpm
Max. torque (crank PTO) 4.9 Nm (0.5 kg·m; 3.6 ft·lb) ta 2,400 rpm
Carburetor Float type with fixed main jet
Cooling system Forced-air
Ignition system Flywheel magneto transistor type
Lubricating system Splash
Starting system Recoil starter
Stoping system Ignition primary circuit ground
Fuel used Unleaded gasoline (octane number 86 or higher)
Fuel tank capacity 1.8 L (1.7 US qt)
Fuel consumption 298 g/HPh
PTO shaft rotation Counterclockwise (from PTO shaft side)

Dimensions and Weight

Kawasaki FJ100D
Length 304 mm (12.0 in)
Width 279 mm (11.0 in)
Height 314 mm (12.4 in)
Dry weight 10.5 kg (23.0 lbs)

Tightening torque specs

Tightening torque specs
Connecting rod bolt 9 Nm; 0.9 kg·m; 6.6 ft·lb
Cylinder head bolt 32 Nm; 3.2 kg·m; 23.6 ft·lb
Flywheel nut 25 Nm; 2.5 kg·m; 18.4 ft·lb
Valve clearance lock nut 7 Nm; 0.7 kg·m; 6 ft·lb
Crankcase cover 9 Nm; 0.9 kg·m; 6.6 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 Information

Maximum speed 4,000 ± 100 rpm
Idle speed 1,600 ± 150 rpm
Cylinder compression 2.0 kg/cm2 (29 psi) at 600 rpm
Valve clearance
Intake valve clearance 0.12 mm (0.0047 in)
Exhaust valve clearance 0.12 mm (0.0047 in)
Oil system
Oil type 4-stroke or an equivalent (SF, SG, SH, or SJ)
Recommended oil SAE 10W-30
Oil capacity 0.45 L (0.43 US. qt)
Ignition system
Spark plug NGK: BR6HS
Spark plug gap 0.7-0.8 mm (0.028-0.031 in)
Ignition coil air gap 0.3 mm (0.012 in)
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