| Model |
RK-50N |
RK-60N |
RK-70N |
| Type |
Horizontal Water-Cooled, 4-Cycle Diesel Engine |
| Number Of Cylinder |
1 |
| Bore x Stroke |
mm (in.) |
72 x 75 (2.83 x 2.95) |
76 x 75 (2.99 x 2.95) |
80 x 75 (3.15 x 2.95) |
| Displacement |
cc (cu.in.) |
305(18.61) |
340 (20.75) |
376 (22.94) |
| Maximum Output |
HP / RPM |
5.0 / 2400 |
6.0 / 2400 |
7.0 / 2400 |
| KW / RPM |
3.73 / 2400 |
4.48 / 2400 |
5.22 / 2400 |
| Continuous Rated Output |
Hp / RPM |
4.5 / 2200 |
5.0 / 2200 |
6.0 / 2200 |
| KW / RPM |
3.36 / 2200 |
3.73 / 2200 |
4.48 / 2200 |
| Maximum Torque |
kgf.m / rpm |
1.62 / 1800 |
1.95 / 1800 |
2.26 / 1800 |
| Specific Fuel Consumption |
g / hp-hr |
208 |
202 |
203 |
| Combustion System |
Three Vortex Combustion System |
| Compression Ratio |
24 |
| Direction Of Revolution |
Counter-Clockwise ( Facing Flywheel ) |
| Starting System |
Manual Speed-Doubling Handle |
| Lubricating System |
Forced Lubrication With Trochoid Pump |
| Cooling System |
Radiator |
| Fuel |
Light Diesel Oil ( SAE No.2-D ) |
| Lubricating Oil |
API Service CB-CC Class ( SAE #30, 20, 10W-30 ) |
| Cooling Water Capacity |
L ( US gal ) |
1.3 (0.34) |
| Fuel Tank Capacity |
L ( US gal ) |
7.5 (1.98) |
| Crankcase Oil Capacity |
L ( US gal ) |
2.0 (0.53) |
| Dry Weight |
Kg ( Ibs. ) |
64 (141.1) |
65 (143.3) |
67 (147.7) |
| Lamp And Dynamo Output |
V-W |
Without Lamp |
| Charge Output |
V-A |
- |
| Starter Power |
V-KW |
- |
