HomeEnginesCummins/Onan Kubota D1803-CR-TIE4BG

Cummins/Onan Kubota D1803-CR-TIE4BG Engine

The Cummins/Onan Kubota D1803-CR-TIE4BG is a 1.83 L 3-cylinder 4-cycle, liquid-cooled diesel engine engine rated at 1800 rpm, producing up to 27 kW. It powers generator sets from Cummins/Onan, including the Onan SD 20 and SD 20. It holds 7 L (1.8 gal) of oil and 11.4 L (3.0 gal) of coolant.

Also known as: Cummins Kubota D1803-CR-TIE4BG

1.826 L
Displacement
3
Cylinders
1800 rpm
Rated speed
27 kW
Gross power

Engine specifications

Oil capacity7.0 L
Coolant capacity11.4 L
Displacement1.826 L
Cylinders3
Aspiration4-cycle, liquid-cooled diesel engine
Rated speed1800 rpm
Gross power27 kW

Generator sets powered by this engine

2
Cummins/Onan Onan SD 20Cummins/Onan SD 20

How to read your Cummins/Onan engine serial & model number →

Maintenance schedule

ItemSpecCapacityPart #Interval
Air filterInstant one-touch stop
Fuel filterElectric fuel pump, long-life fuel filter
Oil filterSpin-on, full-flow oil filter
BatteryBattery monitoring and testing features and smart starting control system
BeltCrankshaft belt, water pump belt, and alternator belt2000 hr
CoolantCooling system capacity12.0 gal (L)
OilLube oil capacity7.4 qt (L)
Spark plugCranking lockout, overspeed shutdown, fail to start (overcrank) shutdown, fail to crank shutdown, sensor failure indication, low fuel level warning or shutdown, low oil pressure warning and shutdown, high coolant temperature warning and shutdown, low coolant level warning or shutdown, low coolant temperature warning, high, low, and weak battery voltage warning2000 hr

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.

Recommended fluids

FluidGradeStandardAmbientCapacityNotes
FuelNo. 2 diesel-29°C to 59°COperating temperature -20°F (-29°C) to 138°F (59°C)

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Common questions

What is the oil capacity of the Cummins/Onan Kubota D1803-CR-TIE4BG?

The Cummins/Onan Kubota D1803-CR-TIE4BG engine has an oil capacity of 7.0 liters.

What is the displacement of the Cummins/Onan Kubota D1803-CR-TIE4BG?

The Cummins/Onan Kubota D1803-CR-TIE4BG has a displacement of 1.826 liters with 3 cylinders.

Which generators use the Cummins/Onan Kubota D1803-CR-TIE4BG engine?

The Cummins/Onan Kubota D1803-CR-TIE4BG powers 2 generator set(s), including Cummins/Onan Onan SD 20, Cummins/Onan SD 20.