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) |
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