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Generac V6 Engine

The Generac V6 is a 4.2 L 6-cylinder naturally aspirated engine rated at 1800 rpm, producing up to 48 kW. It powers generator sets from Generac, including the QT048 and SG040. It holds 6 L (1.6 gal) of oil and 3 L (0.8 gal) of coolant.

Also known as: Generac V6

4.2 L
Displacement
6
Cylinders
1800 rpm
Rated speed
48 kW
Gross power

Engine specifications

Oil capacity6.0 L
Coolant capacity3.0 L
Displacement4.2 L
Cylinders6
AspirationNaturally Aspirated
Rated speed1800 rpm
Gross power48 kW

Maintenance schedule

ItemSpecCapacityPart #Interval
Oil filterFull flow spin-on cartridge
CoolantPressurized Closed3.0 US gal
Oil6.0 Quarts

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

Service specifications

5
TypeItemValueUnitCondition
PressureOperating fuel pressure5" - 14"H2O
SpeedRated synchronous RPM (60 Hz)1800rpm60 Hz
SpeedSteady state frequency regulation±0.25%
TemperatureOperating temperature rise120°C above 40 °C ambientrated
VoltageVoltage regulation±1%

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

Recommended fluids

FluidGradeStandardAmbientCapacityNotes
FuelNatural gas, propane vaporOperating fuel pressure 5" - 14" H2O; secondary fuel regulator and fuel shut off solenoid standard

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 Generac V6?

The Generac V6 engine has an oil capacity of 6.0 liters.

What is the displacement of the Generac V6?

The Generac V6 has a displacement of 4.2 liters with 6 cylinders.

Which generators use the Generac V6 engine?

The Generac V6 powers 2 generator set(s), including Generac QT048, Generac SG040.