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Generac 12.0 DTA Engine

The Generac 12.0 DTA is a 11.9 L 6-cylinder turbocharged and aftercooled engine rated at 2280 rpm. It powers generator sets from Generac, including the GEM750, MB375, MB600 - GEM and MB750-GEM. It holds 31.04 L (8.2 gal) of oil and 83.3 L (22.0 gal) of coolant.

Also known as: Generac 12.0 DTA

Part of the Generac 12.0DT engine family — 2 variants share parts & fitment.

11.9 L

Displacement

Cylinders

2280 rpm

Rated speed

31.04 L

Oil capacity

On this pageSpecs Generator sets Maintenance FAQ Torque & specs Fluids Procedures

Engine specifications

Oil capacity	31.04 L
Coolant capacity	83.3 L
Displacement	11.9 L
Cylinders	6
Aspiration	Turbocharged and Aftercooled
Rated speed	2280 rpm

Generator sets powered by this engine

Generac GEM750 Generac MB375 Generac MB600 - GEM Generac MB750-GEM Generac MD750 - GEM Generac SD375

How to read your Generac engine serial & model number →

Maintenance schedule

Item	Spec	Capacity	Part #
Air filter	Dry		—
Fuel filter	Optional		—
Oil filter	full flow and bypass		—
Coolant	Pressurized, Closed Recovery	83.3 liters	—

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

Service specifications

Type	Item	Value	Unit	Condition
Other	Piston speed	11.4	m/sec.	60 Hz
Pressure	BMEP	264	psi	60 Hz
Pressure	Max. external pressure drop after radiator	0.5	in. H2O
Pressure	Maximum recommended back pressure (exhaust)	5.1	kPa	at rated output
Speed	Coolant flow/min.	223	liters/min	60 Hz
Speed	Rated RPM (engine, each)	2280	rpm	60 Hz
Temperature	Exhaust temperature at rated output (pre-turbo)	732	°C	at rated output

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Recommended fluids

Fluid	Grade	Standard	Ambient	Capacity	Notes
Fuel	#2D (Min. Cetane #40)				Fuel pump lift 40 in.

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Procedures

Typical Operational Sequence operation

A transfer switch in the PM-DCP configuration detects a utility failure and issues a start command.
The command goes to the PM-SC which issues a start command to the PM-PCs.
Each generator will start on its own.
The first generator attaining rated frequency and voltage connects to the common generator bus via the switching mechanism.
The second generator synchronizes and closes into the bus via the switching mechanism.
When both gensets are paralleled to the bus, the PM-SC signals transfer switches to transfer to the load in up to 3 programmed steps.
If an NFPA 10 second start requirement exists, the first unit connects to the bus so a separate emergency transfer switch transfers to the NFPA load.
If a single generator fails, load shed contacts disconnect selected non critical loads.
If load conditions are reduced (night time operation), one generator can be programmed off line (optional).
When utility returns, PM-SC transfers loads back to utility and commands individual PM-PCs to disconnect from the bus.
Each PM-PC operates its generator for the cool-down period and then issues a shutdown command.

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Common questions

What is the oil capacity of the Generac 12.0 DTA?

The Generac 12.0 DTA engine has an oil capacity of 31.04 liters.

What is the displacement of the Generac 12.0 DTA?

The Generac 12.0 DTA has a displacement of 11.9 liters with 6 cylinders.

Which generators use the Generac 12.0 DTA engine?

The Generac 12.0 DTA powers 6 generator set(s), including Generac GEM750, Generac MB375, Generac MB600 - GEM, Generac MB750-GEM, Generac MD750 - GEM.