The Kawasaki FJ180V KAI is a 0.18 l (179 cc, 10.9 cu-in) single-cylinder air-cooled 4-stroke internal combustion small gasoline engine with vertical shaft manufactured by Kawasaki Heavy Industries LTd., for general-purpose applications.
The FJ180V KAI engine has an OHV (overhead valve) design; cast iron cylinder liner; roller ball type top bearing; internally vented carburetor; CDI ignition system; combined crankcase design; metal engine shroud; rotating grass screen. The engine uses dual element cylindrical air cleaner and pressurized lubrication system with spin-on oil filter as an option.
A 65.0 mm (2.56 in) cylinder bore and 54.0 mm (2.13 in) piston stroke give the motor a total of 179 cc of displacement. Compression ratio rating is 8.5:1. The Kawasaki FJ180V KAI motor produced 4.6 PS (3.4 kW; 4.5 HP) at 3,600 rpm of maximum horsepower and 10.0 Nm (1.02 kg·m; 7.4 ft·lb) at 2,400 rpm of torque.
General information
| Engine Specifications | |
| Model | FJ180V KAI |
| Type | 4-stroke, OHV, single cylinder |
| Displacement | 179 cm 3 (10.9 cu-in) |
| Max. horsepower | 4.6 PS (3.4 kW; 4.5 HP) at 3,600 rpm |
| Max. torque (crank PTO) | 10.0 Nm (1.02 kg·m; 7.4 ft·lb) at 2,400 rpm |
| Carburetor | Internally vented carburetor |
| Cooling system | Forced-air |
| Ignition system | CDI |
| 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 | 1.7 L |
| Fuel consumption | 298 g/HPh |
| PTO shaft rotation | Counterclockwise (from PTO shaft side) |
Dimensions and Weight
| Kawasaki FJ180V KAI | |
| Length |
With fuel tank: 422 mm (16.6 in) Without fuel tank: 389 mm (15.3 in) |
| Width |
With fuel tank: 353 mm (13.9 in) Without fuel tank: 353 mm (13.9 in) |
| Height |
With fuel tank: 289 mm (11.4 in) Without fuel tank: 289 mm (11.4 in) |
| Dry weight | 16.9 kg (37.3 lbs) |
Tightening torque specs
| Tightening torque specs | |
| Connecting rod | 6 Nm; 0.6 kg·m; 4.4 ft·lb |
| Flywheel | 42 Nm; 4.2 kg·m; 31 ft·lb |
| Valve clearance lock nut | 7 Nm; 0.7 kg·m; 5.2 ft·lb |
| Crankcase cover | 9 Nm; 0.9 kg·m; 6.6 ft·lb |
| Oil drain plug | 22 Nm; 2.2 kg·m; 16.2 ft·lb |
| Spark plug | 22 Nm; 2.2 kg·m; 16.2 ft·lb |
Service Information
| Engine | |
| Maximum speed | 4,000 ± 100 rpm |
| Idle speed | 1,600 ± 150 rpm |
| Cylinder compression | 2.0 kg/cm2 (196 kPa) at 600 rpm |
| Valve clearance | |
| Intake valve clearance | 0.10-0.15 mm (0.004-0.006 in) |
| Exhaust valve clearance | 0.10-0.15 mm (0.004-0.006 in) |
| Oil system | |
| Oil type | 4-stroke or an equivalent (SF, SG, SH, or SJ) |
| Recommended oil | SAE 10W-30 |
| Oil capacity | 0.65 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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