Kawasaki FJ300D

Kawasaki FJ300DThe 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
Type4-stroke, OHV, single cylinder
Displacement309 cm 3 (18.86 cu-in)
Max. horsepower8.8 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
CarburetorFloat type with fixed main jet
Cooling systemForced-air
Ignition systemCDI
Lubricating systemSplash
Starting system
Stoping systemIgnition primary circuit ground
Fuel usedUnleaded gasoline (octane number 86 or higher)
Fuel tank capacity6.0 L
PTO shaft rotationCounterclockwise (from PTO shaft side)

Dimensions and Weight

Kawasaki FJ300D
Length416 mm (16.4 in)
Width507 mm (20.0 in)
Height451 mm (17.8 in)
Dry weight38.0 kg (83.8 lbs)

Service Information

Maximum speed4,000 ± 100 rpm
Idle speed1,600 ± 150 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 capacity1.0 L
Ignition system
Spark plugNGK: BPR5ES
Spark plug gap0.7-0.8 mm (0.028-0.031 in)
Ignition coil air gap0.3 mm (0.012 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.

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