The Kawasaki FX541V is a 0.6 l (603 cc, 36.8 cu-in) V-twin 90° air-cooled 4-stroke internal combustion small gasoline engine with vertical shaft, manufactured by Kawasaki Heavy Industries LTd., for general-purpose applications, commercial mowers, heavy-duty industrial and construction equipment.
The Kawasaki FX541V has V-twin design with vertical PTO shaft. The motor uses overhead V-valves; spherical combustion chamber; cast-iron cylinder liners; metal engine cover with integrated cleanout ports; rotating grass chopper screen. The engine is equipped with electronic spark ignition and internally vented carburetor with fuel shut-off solenoid. The motor uses a high-performance lubrication system and single or multi-stage canister air filter.
The engine has an automatic compression release (ACR) system with recoil or heavy-duty shift-type starter. 13A or 20A charge coils, muffler, oil pressure switches, and shaft variations are available as an option.
Bore and stroke are 73.0 mm (2.87 in) and 72.0 mm (2.83 in), respectively. Compression ratio rating is 8.1:1. The FX541V engine produced 15.4 PS (11.3 KW; 15.1 HP) at 3,600 rpm or 16.7 PS (12.3 KW; 16.5 HP) at 3,600 rpm of maximum horsepower and 39.1 Nm (4.0 kg·m; 28.9 ft·lb) at 2,200 rpm or 43.4 Nm (4.4 kg·m; 32.0 ft·lb) at 2,000 rpm of torque.
General information
| Engine Specifications | |
| Model | FX541V |
| Type | 4-stroke, OHV, V-twin 90° |
| Displacement | 603 cm 3 (36.8 cu-in) |
| Max. horsepower |
15.4 PS (11.3 KW; 15.1 HP) at 3,600 rpm 16.7 PS (12.3 KW; 16.5 HP) at 3,600 rpm |
| Max. torque (crank PTO) |
39.1 Nm (4.0 kg·m; 28.9 ft·lb) at 2,200 rpm 43.4 Nm (4.4 kg·m; 32.0 ft·lb) at 2,000 rpm |
| Carburetor | Internally vented with fuel shut-off solenoid |
| Cooling system | Air-cooling |
| Ignition system | Electronic spark ignition |
| Lubricating system | High performance lubrication system |
| Starting system | Heavy duty shift type starter |
| Charging system | 13A or 20A charge coil (option) |
| Fuel used | Unleaded gasoline (octane number 91 or higher) |
| Fuel consumption | – |
| Cooling system | Pressurized forced circulation type |
Dimensions and Weight
| Kawasaki FX541V | |
| Length, mm (in) | 468 (18.4) |
| Width, mm (in) | 429 (16.9) |
| Height, mm (in) | 544 (21.4) |
| Dry weight, kg (lb) | 40.7 (89.7) |
Tightening torque specs
| Tightening torque specs | Cylinder head | 27.5 Nm; 2.75 kg·m; 20.3 ft·lb |
| Connecting rod | 10 Nm; 1.0 kg·m; 7.4 ft·lb |
| Flywheel | 56 Nm; 5.7 kg·m; 41.3 ft·lb |
| Crankcase cover | 27.5 Nm; 2.75 kg·m; 20.3 ft·lb |
| Intake manifold | 9 Nm; 0.9 kg·m; 6.6 ft·lb |
| Valve clearance lock nut | 11 Nm; 1.1 kg·m; 8.1 ft·lb |
Maintenance data
| Engine | |
| Maximum speed | 3500 ± 100 rpm |
| Idle speed | 1500 ± 100 rpm |
| Cylinder compression | 4.5 kg/cm2 (64 psi) at 500 rpm |
| Valve clearance | |
| Intake valve | 0.10-0.15 mm (0.004-0.006 in) |
| Exhaust valve | 0.10-0.15 mm (0.004-0.006 in) |
| Oil system | |
| Oil type | 4-stroke or an equivalent (SJ or higher class) |
| Recommended oil | SAE 10W-40, 10W-30 |
| Oil capacity (with filter changed) |
With oil filter: 2.1 litre Without oil filter: 1.8 litre |
| Ignition system | |
| Spark plug | NGK: BPR4ES |
| Spark plug gap | 0.7-0.8 mm (0.027-0.031 in) |
| Ignition coil air gap | 0.2-0.4 mm (0.008-0.011 in) |
| Spark plug tightening torque | 22 Nm; 2.2 kg·m; 16.2 ft·lb |
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