Facts About Generators
GeneratorsDirectoryCompareRepairEnginesControllersPartsManufacturersGuides
Search models or part #
Home›Engines›Generac 5.4L

Generac 5.4L Engine Engine

The Generac 5.4L is a 5.4 L 8-cylinder naturally aspirated engine rated at 1800 rpm, producing up to 35 kW. It powers generator sets from Generac, including the G35LG2, G40LG2, G45LG2 and SG035. It holds 5.7 L (1.5 gal) of oil and 11.36 L (3.0 gal) of coolant.

Also known as: Generac 5.4L

Part of the Generac 5.4L engine family — 2 variants share parts & fitment.

5.4 L
Displacement
8
Cylinders
1800 rpm
Rated speed
35 kW
Gross power

Engine specifications

Oil capacity5.7 L
Coolant capacity11.36 L
Displacement5.4 L
Cylinders8
AspirationNaturally Aspirated
Rated speed1800 rpm
Gross power35 kW

Generator sets powered by this engine

7
Generac G35LG2Generac G40LG2Generac G45LG2Generac SG035Generac SG040Generac SG045Generac SG050

Common problems

7
  • RPM Sensor Loss Shutdown H06
    Fix: Check RPM sensor connections and replace if necessary.
  • Overspeed Shutdown H04
    Fix: Reduce load immediately to prevent engine damage.
  • Overcrank Shutdown H05
    Fix: Check fuel system and ignition components.
  • Low Fuel Pressure Warning H07
    Fix: Check fuel system for leaks or blockages.
  • Low Engine Oil Pressure H03
    Fix: Check and add oil if necessary, or replace oil filter.
  • Low Coolant Level H01
    Fix: Add coolant to the proper level.
  • High Coolant Temperature H02
    Fix: Reduce load or allow engine to cool.

Compiled from service & troubleshooting documentation across every generator set that uses the Generac 5.4L.

Common questions

What is the oil capacity of the Generac 5.4L?

The Generac 5.4L engine has an oil capacity of 5.7 liters.

What is the displacement of the Generac 5.4L?

The Generac 5.4L has a displacement of 5.4 liters with 8 cylinders.

Which generators use the Generac 5.4L engine?

The Generac 5.4L powers 7 generator set(s), including Generac G35LG2, Generac G40LG2, Generac G45LG2, Generac SG035, Generac SG040.

What is a common problem with the Generac 5.4L engine?

A commonly reported issue on generators using the Generac 5.4L is: RPM Sensor Loss Shutdown. Fix: Check RPM sensor connections and replace if necessary..