Kawasaki FH680V

Kawasaki FH680VThe Kawasaki FH680V is a 0.68 l (675 cc, 41.19 cu-in) V-twin 90° air-cooled 4-stroke internal combustion small gasoline motor with vertical shaft, manufactured by Kawasaki Heavy Industries LTd., for general-purpose applications.

The FH680V has vertical PTO shaft; V-twin 90° design with cast iron cylinder liners and overhead valves (OHV). The engine is equipped with float type carburetor with fixed main jet; pulse type fuel pump and flywheel magneto transistor type ignition system.

The Kawasaki FH680V uses a full pressure lubrication system with spin-on oil filter and dual element air cleaner. The engine was equipped with BENDIX type electric starter and 12V-13A charging coil with a regulator.

Cylinder bore and piston stroke are 72.5 mm (2.85 in) and 76 mm (2.99 in), respectively. Compression ratio rating is 8.1:1. The Kawasaki FH680V develops 23.4 PS (17.2 kW; 23.0 HP) at 3,600 rpm and 54.0 Nm (5.5 kg·m; 39.8 ft·lb) at 2,400 rpm of torque.

General information

Engine Specifications
Model FH680V
Type 4-stroke, OHV, V-twin 90°
Displacement 675 cm 3 (41.2 cu-in)
Max. horsepower 23.4 PS (17.2 KW; 23.0 HP) at 3,600 rpm
Max. torque (crank PTO) 54.0 Nm (5.5 kg·m; 39.8 ft·lb) at 2,400 rpm
Carburetor Twin barrel, float type
Cooling system Air-cooling
Ignition system Flywheel magneto transistor type
Lubricating system Full pressure with spin-on oil filter
Starting system Electric starter
Charging system 12 Volt – 13A with regulator
Fuel used Unleaded gasoline (octane number 86 or higher)
Fuel consumption 245 g/HPh
Cooling system Pressurized forced circulation type

Dimensions and Weight

Kawasaki FH680V
Length, mm (in) 458 (18.0)
Width, mm (in) 430 (16.9)
Height, mm (in) 461 (18.1)
Dry weight, kg (lb) 40.0 (88.2)

Tightening torque specs

Tightening torque specs
Cylinder head 28 Nm; 2.8 kg·m; 20.6 ft·lb
Connecting rod 10 Nm; 1.0 kg·m; 7 ft·lb
Flywheel 56 Nm; 5.7 kg·m; 41.3 ft·lb
Intake manifold 6 Nm; 0.6 kg·m; 4.4 ft·lb
Valve clearance lock nut 7 Nm; 0.7 kg·m; 5.1 ft·lb

Maintenance data

Engine
Maximum speed 3500 ± 100 rpm
Idle speed 1500 ± 100 rpm
Cylinder compression 3.9 kg/cm2 (56 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 (SF, SG, SH, or SJ )
Recommended oil SAE 10W-40, 10W-30, 5W-20
Oil capacity (with filter changed) 1.6 L
Ignition system
Spark plug NGK: BPR4ES
Spark plug gap 0.75 mm (0.029 in)
Spark plug tightening torque 22 Nm; 2.2 kg·m; 16.2 ft·lb
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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.

8 Comments

    • Swap your spark plugs if misfire follows spark plug then bad spark plug. If not then swap your coils around. If the misfire follows the coil then bad coil. Kawasaki seems to have an unusually high number of coil failures.

  1. hello my centre bolt holding the clutch came out, i bought a new one and it goes in 90% then it wont tighten it simply keeps turning.
    Could the thread be gone in the shaft? i can actually push the bolt in half an inch but it wont tighten any further

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