Kawasaki FD620D DFI

Kawasaki FD620D DFIThe Kawasaki FD620D DFI is a 0.6 l (617 cc, 37.7 cu-in) V-twin 90° liquid-cooled 4-stroke internal combustion small gasoline motor with horisontal shaft, manufactured by Kawasaki Heavy Industries LTd., for general-purpose applications.

The FD620D DFI has an OHV (overhead valve design); cast-iron cylinder liners; multi-port digital fuel injection; high-pressure transistorized fuel pump; flywheel magneto transistor ignition system; mechanical governor; low tone muffler and compact electronic control unit. The Kawasaki FD620D DFI uses a full pressure lubrication system with spin-on oil filter and dual element air cleaner.

The Kawasaki FD620D DFI develops 19.0 PS (14 kW; 18.7 HP) at 3,600 rpm and 44.6 Nm (4.5 kg·m; 32.9 ft·lb) at 2,200 rpm of torque. Bore and stroke are 76.0 mm (2.99 in) and 68.0 mm (2.68 in), respectively.

General information

Engine Specifications
Model FD620D DFI
Type 4-stroke, OHV, V-twin 90°
Displacement 617 cm 3 (37.7 cu-in)
Max. horsepower 19.0 PS (14 KW; 18.7 HP) at 3,600 rpm
Max. torque (crank PTO) 44.6 Nm (4.5 kg·m; 32.9 ft·lb) at 2,200 rpm
Fuel system Multi port digital fuel injection
Cooling system Liquid-cooling
Ignition system Transistorized ignition
Lubricating system Pressure feed lubrication system
Starting system Electric starter
Charging system 12 Volt – 20 or 30 amps with regulator
Fuel used Unleaded gasoline (octane number 86 or higher)
Cooling system Pressurized forced circulation type

Dimensions and Weight

Length, mm (in) 556 (21.9)
Width, mm (in) 448 (17.6)
Height, mm (in) 624 (24.6)
Dry weight, kg (lb) 41.5 (91.5)

Cylinder Block and Head

Cylinder block
Compression ratio: 9.0:1
Bore x stroke: 76.0 x 68.0 mm (2.99 x 2.68 in)
Cylinder internal diameter (standard): 76.067 mm (2.9948 in)
Piston skirt outer diameter (standard): 75.875 mm (2.9872 in)
Number of piston rings (compression / oil): 2/1
Connecting rod small end diameter (standard): 17.051 mm (0.6713 in)
Piston pin diameter: 16.975 mm (0.6683 in)
Side clearance: Top 0.150 mm (0.0059 in)
Second 0.120 mm (0.0047 in)
Ring end gap: Top 1.200 mm (0.0472 in)
Second 1.200 mm (0.0472 in)
Ring width: Top 1.120 mm (0.0441 in)
Second 1.120 mm (0.0441 in)
Oil 1.500 mm (0.0591 in)
Cylinder head
Valve arrangement: OHV
Valves: 2,(4 valves in total)
Valve steam diameter: INTAKE 5.945 mm (0.2341 in)
EXHAUST 5.925 mm (0.2333 in)
Valve spring free length: INTAKE 29.70 mm (1.1693 in)
EXHAUST 29.70 mm (1.1693 in)

Maintenance data

Idle speed 1500 ± 100 rpm
Cylinder compression 12.0 kg/cm2 (170 psi) at 500 rpm
Valve clearance
Intake valve 0.25 mm (0.010 in)
Exhaust valve 0.25 mm (0.010 in)
Oil system
Oil type 4-stroke or an equivalent (SC, SD, SE, SF, SG, or SH)
Recommended oil SAE 10W-40, 10W-30, 5W-20
Oil capacity (without filter changed) 1.5 L (3.17 US pt)
Oil capacity (with filter changed) 1.8 L (3.80 US pt)
Oil pressure (min) 2.8 kg/cm2 (40 psi)
Cooling system
Coolant capacity 2.7 L (0.7 US gallon)
Valve opening temperature 63-66° C (145-150° F)
Valve full openning lift 7 mm (0.28 in) at 80° C (176° F)
Detect temperature 110° ± 2° C (226° ± 36° C)
Ignition system
Spark plug NGK: BPR2ES
Spark plug gap 0.6-0.7 mm (0.024-0.028 in)
Starter motor
Brush length 10 mm (0.40 in), limit: 6.0 mm (0.24 in)
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