The 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 | |
Model | FH770D KAI |
Type | 4-stroke, OHV, V-twin 90° |
Displacement | 764 cm 3 (46.6 cu-in) |
Max. horsepower | 28.4 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 |
Carburetor | Twin barrel, float type |
Cooling system | Air-cooling |
Ignition system | Electronic spark ignition |
Lubricating system | Full pressure with spin-on oil filter |
Starting system | Electric starter |
Charging system | 12 Volt – 13A or 20A 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 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 head | 32 Nm; 3.2 kg·m; 23.6 ft·lb |
Connecting rod | 10 Nm; 1.0 kg·m; 7 ft·lb |
Flywheel | 56 Nm; 5.7 kg·m; 41.3 ft·lb |
Crankcase cover | 29 Nm; 2.9 kg·m; 21.4 ft·lb |
Intake manifold | 6 Nm; 0.6 kg·m; 4.4 ft·lb |
Oil drain plug | 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) | 1.8 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 |
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.
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