The Cummins/Onan ISB 275* is a 5.9 L 6-cylinder engine rated at 2500 rpm, producing up to 205 kW. It powers generator sets from Cummins/Onan, including the ISB 275. It holds 15 L (4.0 gal) of oil and 9.9 L (2.6 gal) of coolant.
Also known as: Cummins ISB 275*
Part of the Cummins/Onan ISB engine family — 10 variants share parts & fitment.
| Oil capacity | 15.0 L |
|---|---|
| Coolant capacity | 9.9 L |
| Displacement | 5.9 L |
| Cylinders | 6 |
| Rated speed | 2500 rpm |
| Gross power | 205 kW |
How to read your Cummins/Onan engine serial & model number →
| Part # | Description | Category |
|---|---|---|
| 55F8L059A | Freightliner Step-Van Applications, 175-205 HP, VP-44 Rotary Injection Pump | Fuel pump |
| 55F8L059B | Ford Truck, Freightliner Truck & Bus Applications, 175-225 HP, VP-44 Rotary Injection Pump | Fuel pump |
| 55F8L059C | Ford Truck, Freightliner Truck & Bus Applications, 230-275 HP, VP-44 Rotary Injection Pump | Fuel pump |
| 55F8L059D | Dodge Truck Applications, 215-235 HP, VP-44 Rotary Injection Pump | Fuel pump |
| 55G0L059D | Dodge Truck Applications, 235 HP, VP-44 Rotary Injection Pump, For applications without Crankshaft Speed Indicator Ring | Fuel pump |
| 55G0L059E | Dodge Truck Applications, 245 HP, VP-44 Rotary Injection Pump, For applications without Crankshaft Speed Indicator Ring | Fuel pump |
| P01-275 | Oil Filter | Oil filter |
| P01-300 | Oil Filter | Oil filter |
| 55F8D210SB | Complete Drop-In Engines, Build to Order, 175-225 HP, CAC, VP-44 Rotary Pump | Pump |
| 55F8D250SB | Complete Drop-In Engines, Build to Order, 230-275 HP, CAC, VP-44 Rotary Pump | Pump |
| 55F8D190H | Yard Tractor, 190 HP, CAC, HMRO Turbo, Front Sump, VP-44 Rotary Pump | Turbocharger |
| 55F8D250H | Yard Tractor, 250 HP, CAC, HMRO Turbo, Front Sump, VP-44 Rotary Pump | Turbocharger |
| 55G0D205H | Yard Tractor, 205 HP, CAC, HMRO Turbo, Front Sump, VP-44 Rotary Pump | Turbocharger |
| 55G0D225H | Yard Tractor, 225 HP, CAC, HMRO Turbo, Front Sump, VP-44 Rotary Pump | Turbocharger |
| 55G0D275G | Construction / Industrial, 275HP @ 2500 RPM, HMFO Turbo, Rear Pan, VP-44 Pump, 12 Volt | Turbocharger |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
The Cummins/Onan ISB 275* engine has an oil capacity of 15.0 liters.
The Cummins/Onan ISB 275* has a displacement of 5.9 liters with 6 cylinders.
The Cummins/Onan ISB 275* powers 1 generator set(s), including Cummins/Onan ISB 275.