4.4GM Marine Diesel Engine

Auxiliary 4.4GM

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Key Specs

Minimum Power
57.3 HP
42.7 kW
Maximum Power
65.8 HP
49.1 kW
4.1 in
105 mm


Our marine engines for auxiliary applications give you low cost of ownership, excellent fuel economy and competitive prices both for engine and parts. Auxiliary engines generate a vessel's on-board electricity, so they need to be quick to start and feature low noise and low emissions. For heavy duty requirements, such as powering a large fishing vessel's electrically driven net haul system, you really need the extra power that a dedicated auxiliary engine will give to you – rather than generating electricity from the propulsion engine.

Product Specifications for 4.4GM

Minimum Power 57.3 HP 42.7 kW
Maximum Power 65.8 HP 49.1 kW
Maximum Torque 211.3 lb-ft @ 1800 rpm 286.5 Nm @ 1800 rpm
Rated Speed 1500-1800 rpm 1500-1800 rpm
Bore 4.1 in 105 mm
Stroke 5 in 127 mm
Displacement 286.5 in³ 4.4 l
Aspiration Naturally aspirated Naturally aspirated
Rotation from Flywheel End Anti-clockwise Anti-clockwise
Total Lubricating Capacity 2.2 gal (US) 8.5 l
Compression Ratio 18.23:1 18.23:1
Total Coolant Capacity 4 gal (US) 15 l
Number of Cylinders 4 inline 4 inline
Combustion System Direct injection Direct injection
Cooling System Liquid Liquid
Cycle 4 stroke 4 stroke
Width 27.2 in 691 mm
Length - Flywheel Housing 33.2 in 844 mm
Height 34.4 in 875 mm
Wet Weight 1078 lb 489 kg
Dry Weight 1018.5 lb 462 kg
Note 1 Final dimensions dependent on selected options Final dimensions dependent on selected options

4.4GM Standard Equipment

Air inlet system

  • Air filter
  • Closed engine breather system
  • Water jacketed exhaust manifold

Control system

  • Electronic governor (control to ISO 8528 G3)
  • Wiring harness with 23 way connector

Cooling system

  • Deareation headertank
  • Gear driven fresh and auxiliary water pumps
  • Thermostatically controlled cooling water system

Flywheels and flywheel housing

  • Backend - SAE3

Fuel system

  • Rotary fuel injection pump
  • Spin on fuel oil filter and separator

Oil system

  • Flat bottomed cast iron sump
  • Spin on full flow lubrication oil filter with integral lubrication oil cooler on left side of engine

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