Kawasaki FD731V

Kawasaki FD731VThe Kawasaki FD731V is a 0.68 l (675 cc, 41.19 cu-in) V-twin 90° liquid-cooled 4-stroke internal combustion small gasoline motor with vertical shaft, manufactured by Kawasaki Heavy Industries LTd., for general-purpose applications.

The FD731V has OHV (overhead V-valves) design; cast-iron cylinder liners; twin-barrel, internally vented carburetor with fuel shut-off solenoid; electronic spark ignition system. The engine uses a full pressure lubrication system with oil pressure switch and dual-element air cleaner.

The Kawasaki FD731V develops 26.4 PS (19.4 kW; 26.0 HP) at 3,600 rpm and 57.7 Nm (5.9 kg·m; 42.6 ft·lb) at 2,400 rpm of torque. It has a 72.5 mm (2.85 in) cylinder bore and 76 mm (2.99 in) piston stroke. Compression ratio rating is 8.5:1.

General information

Engine Specifications
Model FD731V
Type 4-stroke, OHV, V-twin 90°
Displacement 675 cm 3 (41.19 cu-in)
Max. horsepower 26.4 PS (19.4 KW; 26.0 HP) at 3,600 rpm
Max. torque (crank PTO) 57.7 Nm (5.9 kg·m; 42.6 ft·lb) at 2,400 rpm
Carburetor Twin barrel, internally vented
Cooling system Liquid-cooling
Ignition system Electronic spark
Lubricating system Pressure feed lubrication system
Starting system Electric starter
Charging system High Amp charging coil
Fuel used Unleaded gasoline (octane number 86 or higher)
Fuel consumption 245 g/HPh
Cooling system Pressurized forced circulation type

Dimensions and Weight

Kawasaki FD731V
Length, mm (in) 471 (18.5)
Width, mm (in) 562 (22.1)
Height, mm (in) 384 (15.1)
Dry weight, kg (lb) 45.0 (99.2)

Tightening torque specs

Tightening torque specs
Cylinder head 32 Nm; 3.2 kg·m; 23.6 ft·lb
Connecting rod 9.8 Nm; 1.0 kg·m; 7.2 ft·lb
Flywheel 56 Nm; 5.6 kg·m; 41 ft·lb
Crankcase cover 21 Nm; 2.1 kg·m; 15.5 ft·lb
Intake manifold 6 Nm; 6.0 kg·m; 4.4 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 7.0 kg/cm2 (99 psi) at 500 rpm
Valve clearance
Intake valve 0.15 mm (0.006 in)
Exhaust valve 0.15 mm (0.006 in)
Oil system
Oil type 4-stroke or an equivalent (SC, SD, SE, SF, SG, or SH)
Recommended oil SAE 10W-40, 10W-30, 5W-20
Oil capacity (with filter changed) 2.0-2.3 L
Ignition system
Spark plug NGK: BPR2ES
Spark plug gap 0.75 mm (0.029 in)
Spark plug tightening torque 25 Nm; 2.5 kg·m; 18.4 ft·lb
ATTENTION! Dear visitors, this site is not a trading platform, an official dealer or a spare parts supplier, so we do not have any price lists or spare parts catalogs. We are an information portal and provide the technical specifications of gasoline and diesel engines.

We try to use verified sources and official documentation, however, differences between sources or errors in entering information may occur. We do not provide advice on technical issues related to the engines operation or repair. We do not recommend using provided information for engines repairing engines or spare parts ordering, use only official service manuals and spare-parts catalogs.

25 Comments

  1. I have got 3 fd731 kawasaki engines in hustler mowers. I am going through clutches. I’ve ordered a xtreme clutch and it said to check at the battery the output on Amps. Its supposed to be between 13.5 and 14. All 3 are putting out 14.3 to 15.3. Is this normal for these engines?

  2. I know where there 15 that’s brand new the only thing is there all setup to run on propane a new carburetor will cost u $350, what would you be willing to pay for one

  3. I have a 2005 Hustler Super-Z 60-inch cut, special seat, with a Kaw. FD731V 26-HP Liquid Cooled, runs strong, no oil burner.
    Has only 504 hours, new blades 100 hours. Willing to sell the entire mower for
    $2,500 firm. Can send photos via E-mail. Can trailer it from Minnesota ?$?.

    • Im down south in Ms.but if anybody is intrested,i have a complete FD731V engine ,with exhaust,air cleaner ,radiator,i mean everything is still together on this engine.i ended up with it when i purchased the inventory of a shop that was closeing.i was amazed at the very site of it ,but i dont have much use for it.im open for reasonable offers.

Leave a Reply

Your email address will not be published.


*