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Lister-Petter Engines   Delta Series Industrial Engines

The DWS4 unit is a water-cooled indirect injection diesel engine built with a thin wall cast iroDWS4 Enginen crankcase with ribbing and spherical struts for strength, durability and quiet operation. It has an automotive style oil pan that allows for easier compatibility in OEM equipment. The engine also comes with an internal crankcase breather for reduced emissions and has large bearing surfaces for low bearing loads and long life. It is water-cooled by means of a water circulation pump with a thermostat that is driven by a vee belt. The cooling package is designed for ambients up to 122 degrees. The engine has an indirect injection combustion system for low vibration and low noise and the cylinder head is a cross-flow, with advanced design, for efficiency of combustion.  A full flow spin-on cartridge filter is included and the recommended oil service interval is every 250 hours.


Specifications for the Delta Series Engines



Power Output @ 2500 RPM:

62.1 hp (Continuous power)

65.2 hp (Intermittent power)

Number of Cylinders:





94 mm

3.70 in.


120 mm

4.72 in.

Lubricating Oil Capacity: (including filter)

10.0 liter

10.6 US quarts

Fuel Consumption @ 2500 RPM: (75% load)

10.0 l/h

2.66 US gal/h

Cylinder Capacity:

3.33 litre

203.2 in.3

Dry Weight:

539 lbs


30.7 in. (length)

25.1 in. (width)

28.0 in. (height)

Standard Features:

  • Combustion chamber glow plugs
  • Flywheel with ring gear
  • Fuel filter with water trap
  • Governor - fixed or variable speed
  • High level oil filler
  • Inlet & exhaust manifolds
  • Integral 12 volt fuel control solenoid
  • Lifting eyes
  • Oil pressure switch
  • Raised dipstick on variable speed builds
  • SAE3 flywheel housing on backplate only
  • Water temperature switch
  • 12 volt starter motor
  • 50 amp battery charging alternator


  • Air Cleaner - heavy duty
  • Alternative speed and stop/run control devices
  • Engine bearers
  • Exhaust flanges and silencers
  • Fan drive guards
  • Flywheel end drives
  • Hydraulic pump drives - gear end or flywheel end
  • Lubricating oil cooler
  • Radiators - mounted or loose
  • Pusher or puller cooling fan
  • Self-vent fuel system
  • Start panels