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
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
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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