Kawasaki FJ300D

The Kawasaki FJ300D is a 0.31 l (309 cc, 18.86 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 FJ300D engine has an OHV (overhead valve) design; spherical combustion chamber; cast iron cylinder liner; dual ball bearing main journals; K-Twin balancer; float type carburetor with fixed main jet; CDI ignition system; mechanical governor. The engine uses a dual-element air filter.

A 72.0 mm (2.83 in) cylinder bore and 76.0 mm (2.99 in) piston stroke give the motor a total of 309 cc of displacement. The Kawasaki FJ300D motor produced 8.8 PS (6.5 kW; 8.7 HP)) at 3,600 rpm of maximum horsepower and 19.9 Nm (2.03 kg·m; 14.69 ft·lb) at 2,400 rpm of torque.

General information

Engine Specifications
Model	FJ300D
Type	4-stroke, OHV, single cylinder
Displacement	309 cm 3 (18.86 cu-in)
Max. horsepower	8.8 PS (6.5 KW; 8.7 HP)) at 3,600 rpm
Max. torque (crank PTO)	19.9 Nm (2.03 kg·m; 14.69 ft·lb) at 2,400 rpm
Carburetor	Float type with fixed main jet
Cooling system	Forced-air
Ignition system	CDI
Lubricating system	Splash
Starting system	–
Stoping system	Ignition primary circuit ground
Fuel used	Unleaded gasoline (octane number 86 or higher)
Fuel tank capacity	6.0 L
PTO shaft rotation	Counterclockwise (from PTO shaft side)

Dimensions and Weight

	Kawasaki FJ300D
Length	416 mm (16.4 in)
Width	507 mm (20.0 in)
Height	451 mm (17.8 in)
Dry weight	38.0 kg (83.8 lbs)

Service Information

Engine
Maximum speed	4,000 ± 100 rpm
Idle speed	1,600 ± 150 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	1.0 L
Ignition system
Spark plug	NGK: BPR5ES
Spark plug gap	0.7-0.8 mm (0.028-0.031 in)
Ignition coil air gap	0.3 mm (0.012 in)