Kawasaki FX921V

Kawasaki FX921VThe 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.


General information

Engine Specifications
Type4-stroke, OHV, V-twin 90°
Displacement999 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
CarburetorTwin barrel, internally vented carburetor
Cooling systemAir-cooling
Ignition systemElectronic spark ignition
Lubricating systemHigh performance lubrication system
Starting systemHeavy duty shift type starter
Charging system13A, 20A or 26A charge coil (option)
Fuel usedUnleaded gasoline (octane number 91 or higher)
Fuel consumption
Cooling systemPressurized forced circulation type


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 head46 Nm; 4.6 kg·m; 33.9 ft·lb
Connecting rod20.6 Nm; 2.1 kg·m; 15.2 ft·lb
Flywheel56 Nm; 5.7 kg·m; 41.3 ft·lb
Crankcase cover46 Nm; 4.6 kg·m; 33.9 ft·lb
Intake manifold6 Nm; 0.6 kg·m; 4.4 ft·lb
Oil drain plug7 Nm; 0.7 kg·m; 5.2 ft·lb
Valve clearance lock nut10 Nm; 1.0 kg·m; 7.4 ft·lb


Maintenance data

Maximum speed3500 ± 100 rpm
Idle speed1500 ± 100 rpm
Cylinder compression5.5 kg/cm2 (80 psi) at 500 rpm
Valve clearance
Intake valve0.10-0.15 mm (0.004-0.006 in)
Exhaust valve0.10-0.15 mm (0.004-0.006 in)
Oil system
Oil type4-stroke or an equivalent (SJ or higher class)
Recommended oilSAE 10W-40, 10W-30
Oil capacity (with filter changed) With oil filter: 2.4 litre
Without oil filter: 2.2 litre
Ignition system
Spark plugNGK: BPR5ES
Spark plug gap0.7-0.8 mm (0.027-0.031 in)
Ignition coil air gap0.2-0.4 mm (0.008-0.011 in)
Spark plug tightening torque22 Nm; 2.2 kg·m; 16.2 ft·lb


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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