Kawasaki FH661V

The Kawasaki FH661V is a 0.68 l (675 cc, 41.19 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.

The FH661V has V-twin 90° design with cast iron cylinder liners and overhead V-valves (OHV). The engine is equipped with twin-barrel, float type carburetor with fixed main jet; pulse type fuel pump and flywheel magneto transistor type ignition system. The Kawasaki FH661V uses a full pressure lubrication system with spin-on oil filter and dual element air cleaner.

The engine has 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 76.0 mm (2.99 in), respectively. Compression ratio rating is 8.1:1. The Kawasaki FH661V produced 22.3 PS (16.4 kW; 22.0 HP) at 3,600 rpm.

General information

Engine Specifications
ModelFH661V
Type4-stroke, OHV, V-twin 90°
Displacement675 cm 3 (41.2 cu-in)
Max. horsepower22.3 PS (16.4 KW; 22.0 HP) at 3,600 rpm
Max. torque (crank PTO)
CarburetorTwin barrel, float type
Cooling systemAir-cooling
Ignition systemFlywheel magneto transistor type
Lubricating systemFull pressure with spin-on oil filter
Starting systemElectric starter
Charging system12 Volt – 13A with regulator
Fuel usedUnleaded gasoline (octane number 86 or higher)
Fuel consumption245 g/HPh
Cooling systemPressurized forced circulation type

Tightening torque specs

Tightening torque specs
Cylinder head25 Nm; 2.5 kg·m; 18.4 ft·lb
Connecting rod21 Nm; 2.1 kg·m; 15.5 ft·lb
Flywheel56 Nm; 5.7 kg·m; 41.3 ft·lb
Crankcase cover25 Nm; 2.5 kg·m; 18.4 ft·lb
Intake manifold6 Nm; 0.6 kg·m; 4.4 ft·lb
Valve clearance lock nut7 Nm; 0.7 kg·m; 5.1 ft·lb

Maintenance data

Engine
Maximum speed3500 ± 100 rpm
Idle speed1500 ± 100 rpm
Cylinder compression3.9 kg/cm2 (56 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 (SF, SG, SH, or SJ )
Recommended oilSAE 10W-40, 10W-30, 5W-20
Oil capacity (with filter changed)1.8 litre (1.9 US.qt.)
Ignition system
Spark plugNGK: BPR4ES
Spark plug gap0.75 mm (0.029 in)
Spark plug tightening torque22 Nm; 2.2 kg·m; 16.2 ft·lb
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