Kawasaki FH770D KAI

Kawasaki FH770D KAIThe Kawasaki FH770D KAI is a 0.76 l (764 cc, 46.6 cu-in) V-twin 90° air-cooled 4-stroke internal combustion small gasoline motor with horisontal shaft, manufactured by Kawasaki Heavy Industries LTd., for general-purpose applications.

The FH770D KAI has OHV (overhead valve design); cast-iron cylinder liners; twin-barrel, float type internally vented carburetor with fixed main jet; electronic spark ignition system; mechanical governor and low tone muffler.

The Kawasaki FH770D KAI uses full pressure lubrication system with spin-on oil filter; dual-element air cleaner and multi-position air cleaner cover. The engine was equipped with BENDIX type electric starter and 12V-13A or 20A charging coil with a regulator.

The Kawasaki FH770D KAI develops 28.4 PS (20.9 kW; 28.0 HP) at 3,600 rpm and 64.5 Nm (6.6 kg·m; 47.6 ft·lb) at 2,200 rpm of torque. Bore and stroke are 80.0 mm (3.15 in) and 76.0 mm (2.99 in), respectively. Compression ratio rating is 8.1:1.

General information

Engine Specifications
ModelFH770D KAI
Type4-stroke, OHV, V-twin 90°
Displacement764 cm 3 (46.6 cu-in)
Max. horsepower28.4 PS (20.9 KW; 28.0 HP) at 3,600 rpm
Max. torque (crank PTO)64.5 Nm (6.6 kg·m; 47.6 ft·lb) at 2,200 rpm
CarburetorTwin barrel, float type
Cooling systemAir-cooling
Ignition systemElectronic spark ignition
Lubricating systemFull pressure with spin-on oil filter
Starting systemElectric starter
Charging system12 Volt – 13A or 20A with regulator
Fuel usedUnleaded gasoline (octane number 86 or higher)
Fuel consumption245 g/HPh
Cooling systemPressurized forced circulation type

Dimensions and Weight

Kawasaki FH770D KAI
Length, mm (in)442 (17.4)
Width, mm (in)430 (16.9)
Height, mm (in)663 (26.1)
Dry weight, kg (lb)44.5 (98.1)

Tightening torque specs

Tightening torque specs
Cylinder head32 Nm; 3.2 kg·m; 23.6 ft·lb
Connecting rod10 Nm; 1.0 kg·m; 7 ft·lb
Flywheel56 Nm; 5.7 kg·m; 41.3 ft·lb
Crankcase cover29 Nm; 2.9 kg·m; 21.4 ft·lb
Intake manifold6 Nm; 0.6 kg·m; 4.4 ft·lb
Oil drain plug6 Nm; 0.6 kg·m; 4.4 ft·lb
Valve clearance lock nut7 Nm; 0.7 kg·m; 5.1 ft·lb

Maintenance data

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 L
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
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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