The Kawasaki FD791D DFI is a 0.75 l (745 cc, 45.46 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 FD791D DFI has OHV (overhead valve design); cast-iron cylinder liners; multi-port digital fuel injection; high-pressure electronic fuel pump; flywheel magneto transistor ignition system; mechanical governor; low tone muffler and compact electronic control unit. The Kawasaki FD791D DFI 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 or 30A charging coil with a regulator.
The Kawasaki FD791D DFI produced 29.4 PS (21.6 KW; 29.0 HP) at 3,600 rpm or 26.4 PS (19.4 KW; 26.0 HP) at 3,600 rpm of maximum horsepower and 59.4 Nm (6.06 kg·m; 43.84 ft·lb) at 2,400 rpm or 54.9 Nm (5.6 kg·m; 40.52 ft·lb) at 2,800 rpm of torque. Cylinder bore and piston stroke are 78.0 mm (3.07 in) and 78.0 mm (3.07 in), respectively. Compression ratio rating is 9.0:1.
General information
| Engine Specifications | |
| Model | FD791D DFI |
| Type | 4-stroke, OHV, V-twin 90° |
| Displacement | 745 cm 3 (45.46 cu-in) |
| Max. horsepower |
29.4 PS (21.6 KW; 29.0 HP) at 3,600 rpm 26.4 PS (19.4 KW; 26.0 HP) at 3,600 rpm |
| Max. torque (crank PTO) |
59.4 Nm (6.06 kg·m; 43.84 ft·lb) at 2,400 rpm 54.9 Nm (5.6 kg·m; 40.52 ft·lb) at 2,800 rpm |
| Carburetor | Multi port digital fuel injection |
| Cooling system | Liquid-cooling |
| Ignition system | Transistorized ignition |
| Lubricating system | Pressurized lubrication system |
| Starting system | Electric starter |
| Charging system | 12 Volt – 20A or 30A 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 FD791D DFI | |
| Length, mm (in) | 520 (20.5) |
| Width, mm (in) | 458 (18.0) |
| Height, mm (in) | 580 (22.8) |
| Dry weight, kg (lb) | 57.0 (125.7) |
Tightening torque specs
| Tightening torque specs | Cylinder head | 27 Nm; 2.7 kg·m; 20 ft·lb |
| Connecting rod | 21 Nm; 2.1 kg·m; 15.5 ft·lb |
| Flywheel | 56 Nm; 5.5 kg·m; 41 ft·lb |
| Crankcase cover | 22 Nm; 2.2 kg·m; 16.2 ft·lb |
| Intake manifold | 12 Nm; 1.2 kg·m; 9 ft·lb |
| Oil drain plug | 25 Nm; 2.5 kg·m; 18.5 ft·lb |
| Valve clearance lock nut | 11 Nm; 1.1 kg·m; 8 ft·lb |
Maintenance data
| Engine | |
| Maximum speed | 3500 ± 100 rpm |
| Idle speed | 1500 ± 100 rpm |
| Cylinder compression | 7.5 kg/cm2 (107 psi) at 500 rpm |
| Valve clearance | |
| Intake valve | 0.15 mm (0.006 in) |
| Exhaust valve | 0.15 mm (0.006 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) | 1.8-2.0 L (1.9-2.1 US qt) |
| Ignition system | |
| Spark plug | NGK: BPR2ES |
| Spark plug gap | 0.75 mm (0.03 in) |
| Spark plug tightening torque | 25 Nm; 2.5 kg·m; 18.5 ft·lb |
| Ignition coil air gap | 0.25-0.40 mm (0.009-0.015 in) |
Author:
I am designing a road worthy buggy and plan to use multiple FD791D-DFi ENGINES.
Would love to have a 3D model (STL/IGES) of the engine to help my design.
847-987-8206.
We design and build material handling automated machines not related to this product.
Thanks
Would you happen to know the stator Voltage on a Kawasaki FD791D DFI