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Generac 3500iO Engine Engine

The Generac 3500iO is a 0.21 L 1-cylinder engine. It powers generator sets from Generac, including the GP3500iO. It holds 0.6 L (0.2 gal) of oil.

Also known as: Generac 3500iO

0.212 L
Displacement
1
Cylinders
0.6 L
Oil capacity

Engine specifications

Oil capacity0.6 L
Displacement0.212 L
Cylinders1

Generator sets powered by this engine

2
Generac 3500iOGenerac GP3500iO

Maintenance schedule

ItemSpecCapacityPart #Interval
Air filter** Clean/Replace Air Filter300 hr find
Fuel filter+100 hr find
Oil filterChange oil ǂ100 hr find
Belt find
Coolant
Coolant filter find
Hydraulic filter find
OilAt Each Use, Every 100 Hours or Every 6 Months0.6 L100 hr

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

Common questions

What is the oil capacity of the Generac 3500iO?

The Generac 3500iO engine has an oil capacity of 0.6 liters.

What is the displacement of the Generac 3500iO?

The Generac 3500iO has a displacement of 0.212 liters with 1 cylinders.

Which generators use the Generac 3500iO engine?

The Generac 3500iO powers 2 generator set(s), including Generac 3500iO, Generac GP3500iO.

How often should you change the oil in the Generac 3500iO?

The Generac 3500iO oil change interval is every 100 hours.