The 5.2-liter Mitsubishi 4M51 diesel is a bored-out version of the 4M50. It was installed on heavier versions of the Fuso Canter from 1998 to about 2004.
The bore was increased to 118 mm with the same 120 mm stroke, giving 5249 cc. The naturally aspirated version produces 140 hp at 3200 rpm and 333 Nm at 1600 rpm.
The 4M5 series also includes: 4M50.
Specifications
| Production years | 1998-2004 |
| Displacement, cc | 5249 |
| Power output, hp | 140 – 155 |
| Torque output, Nm | 333 |
| Cylinder block | cast iron R4 |
| Cylinder bore, mm | 118 |
| Piston stroke, mm | 120 |
| Turbocharging | no |
| Fuel type | diesel |
The engine was installed on:
- Mitsubishi Fuso Canter 6 in 1998 – 2002;
- Mitsubishi Fuso Canter 7 in 2002 – 2004.
