The Kawasaki FD661D is a 0.62 l (617 cc, 37.65 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 FD661D has OHV (overhead valve design); cast-iron cylinder liners; float type carburetor with fixed main jet; transistorized fuel pump; full transistor ignition system with fixed timing; mechanical governor and low tone muffler. The Kawasaki FD661D uses a full pressure lubrication system with spin-on oil filter and dual element air cleaner.
The engine was equipped with solenoid shift-type electric starter and 12V-20A charging coil with a regulator.
The Kawasaki FD661D develops 22.3 PS (16.4 kW; 22.0 HP) at 3,600 rpm and 45.7 Nm (4.66 kg·m; 33.73 ft·lb) at 2,400 rpm of torque. It has a 76.0 mm (2.99 in) cylinder bore and 68.0 mm (2.68 in) piston stroke. Compression ratio rating is 10.3:1.
General information
| Engine Specifications | |
| Model | FD661D |
| Type | 4-stroke, OHV, V-twin 90° |
| Displacement | 617 cm 3 (37.65 cu-in) |
| Max. horsepower | 22.3 PS (16.4 KW; 22.0 HP) at 3,600 rpm |
| Max. torque (crank PTO) | 45.7 Nm (4.66 kg·m; 33.73 ft·lb) at 2,800 rpm |
| Carburetor | Float type |
| Cooling system | Liquid-cooling |
| Ignition system | Transistorized ignition |
| Lubricating system | Pressure feed lubrication system |
| Starting system | Electric starter |
| Charging system | 12 Volt – 20A with regulator |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
| Fuel consumption | 230 g/HPh |
| Cooling system | Pressurized forced circulation type |
Dimensions and Weight
| Kawasaki FD661D | |
| Length, mm (in) | 556 (21.9) |
| Width, mm (in) | 437 (17.2) |
| Height, mm (in) | 586 (23.0) |
| Dry weight, kg (lb) | 47.2 (104.1) |
Tightening torque specs
| Tightening torque specs | Cylinder head | 21 Nm; 2.1 kg·m; 15.5 ft·lb |
| Connecting rod | 21 Nm; 2.1 kg·m; 15.5 ft·lb |
| Flywheel | 110 Nm; 11.2 kg·m; 81 ft·lb |
| Crankcase cover | 25 Nm; 2.5 kg·m; 18.4 ft·lb |
| Intake manifold | 8 Nm; 8.0 kg·m; 6 ft·lb |
| Oil drain plug | 23 Nm; 2.3 kg·m; 17 ft·lb |
| Valve clearance lock nut | 8.8 Nm; 0.9 kg·m; 6.5 ft·lb |
Maintenance data
| Engine | |
| Maximum speed | 3500 ± 100 rpm |
| 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 (with filter changed) | 1.5 L (1.6 US qt) |
| Ignition system | |
| Spark plug | NGK: BPR5ES |
| Spark plug gap | 0.6-0.7 mm (0.024-0.028 in) |
| Spark plug tightening torque | 15 Nm; 1.5 kg·m; 11 ft·lb |
what is length and diameter of out put shaft ? tou gave all info. but
What is the most common cause of the engine surging and running ruff once it’s warmed up
Looking for wiring diagram for this engine FD661D, in particular, the voltage regulator. Original connector is falling apart. 6 pins.