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The Perkins 404 range of electric power (EP) engines is the largest, most refined member of the 400 Series. The 4 cylinder, 2.2 litre 404 offers improvements such as reduced noise, vibration and harshness (NVH). Offering the same customer benefits as the wider 400 family – such as reliability, cold-start capability, low operating costs, excellent fuel economy and compact, clever design – the 404 makes a smart choice for customers in the generator set market across unregulated and EU Stage IIIA/U.S. EPA Tier4 interim territories.


2.2 litre

20-22 kVA

The 404A-22G ElectropaK engine is a powerful but quiet 2.2 litre naturally aspirated 4 cylinder compact package. It's designed for use in unregulated territories.

Power Rating

Mechanical Output 18-20 kWm 18-20 kWm Less
Electrical Output 20-22 kVA (16-18 kWe) 20-22 kVA (16-18 kWe) Less
Rated Speed 1500 rpm 1500 rpm Less

Emission Standards

Emissions This engine does not comply to Harmonised International Regulated Emissions Limits This engine does not comply to Harmonised International Regulated Emissions Limits Less


Bore 3.3 in 84.0 mm Less
Stroke 3.9 in 100.0 mm Less
Displacement 135.2 in³ 2.2 l Less
Aspiration Naturally aspirated Naturally aspirated Less
Compression Ratio 23.3:1 23.3:1 Less
Combustion System Indirect injection Indirect injection Less
Rotation from Flywheel End Anti-clockwise Anti-clockwise Less
Total Coolant Capacity 1.8 gal (US) 7.0 l Less
Number of Cylinders 4 inline 4 inline Less
Total Lubricating Capacity 2.8 gal (US) 10.6 l Less
Cooling System Liquid Liquid Less
Cycle 4 stroke 4 stroke Less

Engine Dimensions*

Width 19.6 in 497.0 mm Less
Dry Weight 533.5 lb 242.0 kg Less
Length 37.2 in 946.0 mm Less
Height 33.1 in 841.0 mm Less


Note 1 Final dimensions dependent on selected options Final dimensions dependent on selected options Less

A lifetime of low cost

Reliability, superb fuel economy, ease of installation and trusted components all combine to keep your cost of ownership to a minimum. Cost-saving aftertreatment options are also available.

Powerful, quiet and refined

The 404 range of engines give 20-40 kVA generator output, along with the extra refinement and noise reduction that 4 cylinder engines provide. Its power density, durability, fuel efficiency and quiet operation set it apart from similar sized competitors' engines. The 404 range's quiet operation makes it an excellent option where noise is a concern, particularly if you're operating in urban areas.

404A-22G Standard Equipment

Air inlet system
  • Mounted air filter

Control system
  • 12 volt Electronic Shut Off Solenoid (ESOS) energised to run
  • 12 volt starter motor and 12 volt 15 amp alternator with DC output
  • Glow plug cold start aid and heater/starter switch
  • Oil pressure and coolant temperature switches

Cooling system
  • Thermostatically-controlled system with belt driven coolant pump and pusher fan
  • Mounted radiator, piping and guards

Flywheel and flywheel housing
  • Flywheel housing SAE 4 long
  • High inertia flywheel to SAE J620 Size 190.5 mm (7½ in) heavy

Fuel system
  • Mechanically governed cassette type fuel injection pump
  • Split element fuel filter

  • Front and rear engine mounting brackets

Oil system
  • Spin-on full flow lubrication oil filter
  • Wet steel sump with filler and dipstick