Kawasaki FR730V

Kawasaki FR730VThe Kawasaki FR730V 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 residential zero-turn mowers, lawn and garden tractors.

The FR730V has 90 degrees V-twin design with vertical PTO shaft, overhead valves, cast iron cylinder liners, spherical combustion chamber and rotating metal grass chopper screen. The engine is equipped with an internally vented carburetor with fuel shut-off solenoid and equipped with the electronic spark ignition system. The motor uses a high-performance lubrication system and single-stage air filter.

The engine has bendix type electric starter with automatic compression release (ACR) system. 13A or 20A charge coils are available as an option.

It has a 78.0 mm (3.07 in) cylinder bore and 76.0 mm (2.99 in) piston stroke. Compression ratio rating is 8.2:1. The Kawasaki FR730V 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 and of maximum horsepower and 54.3 Nm (5.5 kg·m; 40.0 ft·lb) at 2,000 rpm or 53.9 Nm (5.5 kg·m; 39.8 ft·lb) at 2,200 rpm of torque.

General information

Engine Specifications
Model FR730V
Type 4-stroke, OHV, V-twin 90°
Displacement 726 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) 54.3 Nm (5.5 kg·m; 40.0 ft·lb) at 2,000 rpm
53.9 Nm (5.5 kg·m; 39.8 ft·lb) at 2,200 rpm
Carburetor Internally vented with fuel shut-off solenoid
Cooling system Air-cooling
Ignition system Electronic spark ignition
Lubricating system Full pressure with spin-on oil filter
Starting system Bendix type starter
Charging system 13A or 20A charge coil (option)
Fuel used Unleaded gasoline (octane number 86 or higher)
Fuel consumption 245 g/HPh
Cooling system Pressurized forced circulation type

Dimensions and Weight

Kawasaki FR730V
Length, mm (in) 501 (19.7)
Width, mm (in) 466 (18.3)
Height, mm (in) 392 (15.4)
Dry weight, kg (lb) 40.0 (88.2)

Tightening torque specs

Tightening torque specs
Cylinder head 46 Nm; 4.6 kg·m; 33.9 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
Oil drain plug 7 Nm; 0.7 kg·m; 5.2 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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