The Kawasaki FS730V-EFI 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-EFI has 90 degrees V-twin design with vertical PTO shaft, overhead V-valves, cast iron cylinder liners, spherical combustion chamber, proven open-loop design, clean-out ports. The engine is equipped with electronic altitude compensation, sequential multiport fuel injection system, integrated electronic governor, compact electronic control unit, integrated throttle body, and ECU and electronic controlled ignition timing system. The motor uses a high-performance lubrication system, high-pressure fuel injection system with an electronic fuel pump and dual-element air filter.
Bore and stroke are 78.0 mm (3.07 in) and 76.0 mm (2.99 in), respectively. Compression ratio rating is 8.1:1. The Kawasaki FS730V-EFI produced 24.1 PS (17.7 kW; 23.7 HP) at 3,600 rpm or 25.8 PS (19.0 kW; 25.5 HP) at 3,600 rpm of maximum horsepower and 53.4 Nm (5.4 kg·m; 39.4 ft·lb) at 2,400 rpm or 54.2 Nm (5.5 kg·m; 40.0 ft·lb) at 2,400 rpm of torque.
General information
| Engine Specifications | |
| Model | FS730V-EFI |
| Type | 4-stroke, OHV, V-twin 90° |
| Displacement | 726 cm 3 (44.3 cu-in) |
| Max. horsepower | 24.1 PS (17.7 KW; 23.7 HP) at 3,600 rpm 25.8 PS (19.0 KW; 25.5 HP) at 3,600 rpm |
| Max. torque (crank PTO) | 53.4 Nm (5.4 kg·m; 39.4 ft·lb) at 2,400 rpm 54.2 Nm (5.5 kg·m; 40.0 ft·lb) at 2,400 rpm |
| Fuel system | Sequential multiport fuel injection |
| Cooling system | Air-cooling |
| Ignition system | Electronic controlled ignition timing system |
| Lubricating system | Full pressure with spin-on oil filter |
| Starting system | Electric starter |
| Charging system | 13A or 20A charge coil (option) |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
| Fuel consumption | – |
| Cooling system | Pressurized forced circulation type |
Dimensions and Weight
| Kawasaki FS730V-EFI | |
| Length, mm (in) | 507 (20.0) |
| Width, mm (in) | 466 (18.3) |
| Height, mm (in) | 409 (16.1) |
| Dry weight, kg (lb) | 46.5 (102.5) |
Maintenance data
| Engine | |
| Maximum speed | 3500 ± 100 rpm |
| Idle speed | 1500 ± 100 rpm |
| Cylinder compression | 4.5 kg/cm2 (64 psi) at 500 rpm |
| 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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