The Kawasaki FX921V is a 1.0 l (999 cc, 60.96 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 FX921V has V-twin design with vertical PTO shaft. The motor uses overhead V-valves (three Valves per cylinder); spherical combustion chamber; cast iron cylinder liners; metal engine cover with integrated clean out ports; rotating metal grass chopper screen. The engine is equipped with electronic spark ignition and twin barrel, internally vented carburetor with fuel shut-off solenoid. The FX921V motor uses high-performance lubrication system with high-efficiency oil cooler and double or multi-stage canister air filter.
The engine has an automatic compression release (ACR) system with heavy duty shift type starter. 13A, 20A or 26A charge coils, shaft variations, oil pressure switches, and various oil drains are available as an option.
It has an 89.2 mm (3.51 in) cylinder bore and 80.0 mm (3.15 in) piston stroke. Compression ratio rating is 8.4:1. The Kawasaki FX921V engine produced 29.4 PS (21.6 kW; 29.0 HP) at 3,600 rpm or 31.4 PS (23.1 kW; 31.0 HP) at 3,600 rpm of maximum horsepower and 66.7 Nm (6.8 kg·m; 49.2 ft·lb) at 2,400 rpm or 73.6 Nm (7.5 kg·m; 54.3 ft·lb) at 2,400 rpm of torque.
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General information
| Engine Specifications | |
| Model | FX921V |
| Type | 4-stroke, OHV, V-twin 90° |
| Displacement | 999 cm 3 (60.96 cu-in) |
| Max. horsepower |
29.4 PS (21.6 KW; 29.0 HP) at 3,600 rpm 31.4 PS (23.1 KW; 31.0 HP) at 3,600 rpm |
| Max. torque (crank PTO) |
66.7 Nm (6.8 kg·m; 49.2 ft·lb) at 2,400 rpm 73.6 Nm (7.5 kg·m; 54.3 ft·lb) at 2,400 rpm |
| Carburetor | Twin barrel, internally vented carburetor |
| 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, 20A or 26A charge coil (option) |
| Fuel used | Unleaded gasoline (octane number 91 or higher) |
| Fuel consumption | – |
| Cooling system | Pressurized forced circulation type |
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Dimensions and Weight
| Kawasaki FX921V | |
| Length, mm (in) | 508 (20.0) |
| Width, mm (in) | 500 (19.7) |
| Height, mm (in) | 686 (27.0) |
| Dry weight, kg (lb) | 62.6 (138) |
Tightening torque specs
| Tightening torque specs | Cylinder head | 46 Nm; 4.6 kg·m; 33.9 ft·lb |
| Connecting rod | 20.6 Nm; 2.1 kg·m; 15.2 ft·lb |
| Flywheel | 56 Nm; 5.7 kg·m; 41.3 ft·lb |
| Crankcase cover | 46 Nm; 4.6 kg·m; 33.9 ft·lb |
| Intake manifold | 6 Nm; 0.6 kg·m; 4.4 ft·lb |
| Oil drain plug | 7 Nm; 0.7 kg·m; 5.2 ft·lb |
| Valve clearance lock nut | 10 Nm; 1.0 kg·m; 7.4 ft·lb |
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Maintenance data
| Engine | |
| Maximum speed | 3500 ± 100 rpm |
| Idle speed | 1500 ± 100 rpm |
| Cylinder compression | 5.5 kg/cm2 (80 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: 2.4 litre Without oil filter: 2.2 litre |
| Ignition system | |
| Spark plug | NGK: BPR5ES |
| 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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