Kawasaki FJ100D

The 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

Engine
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)