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
ModelFJ100D
Type4-stroke, OHV, single cylinder
Displacement98 cm 3 (5.98 cu-in)
Max. horsepower3.0 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
CarburetorFloat type with fixed main jet
Cooling systemForced-air
Ignition systemFlywheel magneto transistor type
Lubricating systemSplash
Starting systemRecoil starter
Stoping systemIgnition primary circuit ground
Fuel usedUnleaded gasoline (octane number 86 or higher)
Fuel tank capacity1.8 L (1.7 US qt)
Fuel consumption298 g/HPh
PTO shaft rotationCounterclockwise (from PTO shaft side)

Dimensions and Weight

Kawasaki FJ100D
Length304 mm (12.0 in)
Width279 mm (11.0 in)
Height314 mm (12.4 in)
Dry weight10.5 kg (23.0 lbs)

Tightening torque specs

Tightening torque specs
Connecting rod bolt9 Nm; 0.9 kg·m; 6.6 ft·lb
Cylinder head bolt32 Nm; 3.2 kg·m; 23.6 ft·lb
Flywheel nut25 Nm; 2.5 kg·m; 18.4 ft·lb
Valve clearance lock nut7 Nm; 0.7 kg·m; 6 ft·lb
Crankcase cover9 Nm; 0.9 kg·m; 6.6 ft·lb
Oil drain plug32 Nm; 3.3 kg·m; 24 ft·lb
Spark plug23 Nm; 2.3 kg·m; 17 ft·lb

Service Information

Engine
Maximum speed4,000 ± 100 rpm
Idle speed1,600 ± 150 rpm
Cylinder compression2.0 kg/cm2 (29 psi) at 600 rpm
Valve clearance
Intake valve clearance0.12 mm (0.0047 in)
Exhaust valve clearance0.12 mm (0.0047 in)
Oil system
Oil type4-stroke or an equivalent (SF, SG, SH, or SJ)
Recommended oilSAE 10W-30
Oil capacity0.45 L (0.43 US. qt)
Ignition system
Spark plugNGK: BR6HS
Spark plug gap0.7-0.8 mm (0.028-0.031 in)
Ignition coil air gap0.3 mm (0.012 in)
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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.

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