Kawasaki FS730V

Kawasaki FS730VThe Kawasaki FS730V is a 0.73 l (726 cc, 44.3 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, such as zero-turn riders, lawn and garden tractors and wide-area walk-behind mowers.

The FS730V has 90 degrees V-twin design with vertical PTO shaft, overhead V-valves, cast iron cylinder liners, and spherical combustion chamber. The engine is equipped with the electronic spark ignition system, internally vented carburetor with fuel shut-off solenoid, rotating grass chopper screen, integrated clean out ports. The motor uses a high-performance lubrication system and dual-element air filter.

The engine has an automatic compression release (ACR) system with bendix type starter. 13A or 20A charge coils, muffler, oil pressure switches, various oil drains are available as an option.

Bore and stroke are 78.0 mm (3.07 in) and 76.0 mm (2.99 in), respectively. Compression ratio rating is 8.2:1. The Kawasaki FS730V produced 22.6 PS (16.6 kW; 22.2 HP) at 3,600 rpm or 24.3 PS (17.9 kW; 24.0 HP) at 3,600 rpm of maximum horsepower and 53.7 Nm (5.5 kg·m; 39.6 ft·lb) at 2,000 rpm or 54.2 Nm (5.53 kg·m; 40 ft·lb) at 2,400 rpm of torque.

General information

Engine Specifications
ModelFS730V
Type4-stroke, OHV, V-twin 90°
Displacement726 cm 3 (44.3 cu-in)
Max. horsepower 22.6 PS (16.6 KW; 22.2 HP) at 3,600 rpm
24.3 PS (17.9 KW; 24.0 HP) at 3,600 rpm
Max. torque (crank PTO) 53.7 Nm (5.5 kg·m; 39.6 ft·lb) at 2,000 rpm
54.2 Nm (5.5 kg·m; 40.0 ft·lb) at 2,400 rpm
CarburetorInternally vented with fuel shut-off solenoid
Cooling systemAir-cooling
Ignition systemElectronic spark ignition
Lubricating systemFull pressure with spin-on oil filter
Starting systemBendix type starter
Charging system13A or 20A charge coil (option)
Fuel usedUnleaded gasoline (octane number 86 or higher)
Fuel consumption
Cooling systemPressurized forced circulation type

Dimensions and Weight

Kawasaki FS730V
Length, mm (in)500 (19.7)
Width, mm (in)471 (18.5)
Height, mm (in)391 (15.4)
Dry weight, kg (lb)41.0 (90.4)

Tightening torque specs

Tightening torque specs
Cylinder head46 Nm; 4.6 kg·m; 33.9 ft·lb
Connecting rod10 Nm; 1.0 kg·m; 7.4 ft·lb
Flywheel56 Nm; 5.7 kg·m; 41.3 ft·lb
Crankcase cover27.5 Nm; 2.75 kg·m; 20.3 ft·lb
Intake manifold9 Nm; 0.9 kg·m; 6.6 ft·lb
Oil drain plug7 Nm; 0.7 kg·m; 5.2 ft·lb
Valve clearance lock nut11 Nm; 1.1 kg·m; 8.1 ft·lb

Maintenance data

Engine
Maximum speed3500 ± 100 rpm
Idle speed1500 ± 100 rpm
Cylinder compression4.5 kg/cm2 (64 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: 2.1 litre
Without oil filter: 1.8 litre
Ignition system
Spark plugNGK: BPR4ES
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
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