Kawasaki FD620D DFI (617 cc, 18.7 HP) water-cooling engine: review and specs

The 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

	FD620D DFI
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)

Maintenance data

Engine
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)
Thermostat
Valve opening temperature	63-66° C (145-150° F)
Valve full openning lift	7 mm (0.28 in) at 80° C (176° F)
Thermoswitch
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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