The Generac MMC 4G15 is a 1.5 L 4-cylinder naturally aspirated engine rated at 3600 rpm, producing up to 40 kW. It powers generator sets from Generac, including the EXPRESS SERIES, Home Standby-15, Home Standby-20 and SG010. It holds 3.8 L (1.0 gal) of oil and 0.9 L (0.2 gal) of coolant.
Maintenance schedule
| Item | Spec | Capacity | Part # | Interval | |
|---|
| Air filter | N.G./L.P. | | — | 100 hr | |
| Fuel filter | N.G./L.P. | | — | 100 hr | |
| Oil filter | N.G./L.P. | | — | 100 hr | |
| Battery | N.G./L.P. | | — | 100 hr | |
| Belt | N.G./L.P. | | — | 100 hr | |
| Coolant | Cooling system with coolant capacity of 2 US gallons, radiator capacity of 1.75 US gallons, and coolant flow rate of 10.6 US gallons per minute | | — | | |
| Oil | Gear type oil pump, full flow, cartridge oil filter | 3.8 L | — | | |
| Spark plug | Battery Cables | | — | 1000 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 MMC 4G15?
The Generac MMC 4G15 engine has an oil capacity of 3.8 liters.
What is the displacement of the Generac MMC 4G15?
The Generac MMC 4G15 has a displacement of 1.5 liters with 4 cylinders.
Which generators use the Generac MMC 4G15 engine?
The Generac MMC 4G15 powers 7 generator set(s), including Generac EXPRESS SERIES, Generac Home Standby-15, Generac Home Standby-20, Generac SG010, Generac SG015.