M12 Engine

The M12 is a 0.48 L engine, producing up to 9 kW. It powers generator sets from Kohler.

Also known as: M12

0.4765 L

Displacement

9 kW

Gross power

Displacement	0.4765 L
Gross power	9 kW

Will Not Start
Cause: Improper Fuel, Dirty Air Cleaner, Incorrect Spark Plug

Compiled from service & troubleshooting documentation across every generator set that uses the M12.

Item	Spec	Capacity	Part #	Interval
Air filter	Check air cleaner for dirty, loose, or damaged parts. Check air intake and cooling areas, clean as necessary.		—	700 hr
Fuel filter			—
Oil filter			—	2500 hr
Battery	A 12 volt battery is normally used. Refer to the operating instructions of the equipment this engine powers for specific battery requirements.		—	200 hr
Belt			—
Coolant			—
Oil	Change oil after the first 5 hours of operation. Thereafter, change oil after every 25 hours of operation.	1.0 U.S. qt.	—	25 hr
Spark plug	Check spark plug condition and gap. Change oil.		—	200 hr

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

What is the displacement of the M12?

The M12 has a displacement of 0.4765 liters.

Which generators use the M12 engine?

The M12 powers 1 generator set(s), including Kohler M12.

How often should you change the oil in the M12?

The M12 oil change interval is every 25 hours.

What is a common problem with the M12 engine?

A commonly reported issue on generators using the M12 is: Will Not Start. Cause: Improper Fuel, Dirty Air Cleaner, Incorrect Spark Plug.