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Generac 3.9GN Engine Engine

The Generac 3.9GN is a 3.9 L -6-cylinder naturally aspirated engine rated at 1800 rpm. It powers generator sets from Generac, including the Home Standby - 40, SG020, SG025 and SG030. It holds 4.25 L (1.1 gal) of oil and 7.9 L (2.1 gal) of coolant.

Also known as: GENERAC 3.9GN

3.9 L
Displacement
-6
Cylinders
1800 rpm
Rated speed
4.25 L
Oil capacity

Engine specifications

Oil capacity4.25 L
Coolant capacity7.9 L
Displacement3.9 L
Cylinders-6
AspirationNaturally Aspirated
Rated speed1800 rpm

Common questions

What is the oil capacity of the Generac 3.9GN?

The Generac 3.9GN engine has an oil capacity of 4.25 liters.

What is the displacement of the Generac 3.9GN?

The Generac 3.9GN has a displacement of 3.9 liters with -6 cylinders.

Which generators use the Generac 3.9GN engine?

The Generac 3.9GN powers 6 generator set(s), including Generac Home Standby - 40, Generac SG020, Generac SG025, Generac SG030, Generac SG035.