M944W3 – 30/26 kW

Engine Block

  • Four cycle, 4 cylinder, liquid cooled, naturally aspirated, overhead valve diesel.
  • Induction hardened crankshaft. Forged carbon steel – stronger than cast iron.
  • Helical cut and ground, carbon steel timing and PTO gears reduce noise.
  • Cross flow head for efficient breathing.

Cooling System

  • Freshwater cooling system in heat exchanger or keel cooled configuration.
  • Large, easy-fill single-piece exhaust manifold is freshwater cooled for safety. No hot, dry risers. Fewer troublesome hoses and gaskets. Cast iron to resist corrosion and electrolysis.
  • Zinc anode electrolysis protection.
  • Heat exchanger cooling is standard. Cupro-nickel tube-type heat exchanger has removable ends for easy cleaning. Rubber impeller seawater pump of bronze and stainless steel is gear driven; no belt.


Fuel System

  • IDI with glow plugs.
  • Bosch-type in-line injection pump with 5% mechanical governor for close AC frequency control.
  • Pintle injectors.
  • Mechanical lift pump with hand primer. No electric pump to fail.
  • Large spin-on fuel filter.
  • Flexible fuel lines routed to base.
  • Stop solenoid controls the fuel rack, not the throttle, to eliminate speed variances and linkage problems.


Intake and Exhaust

  • Washable air cleaner in cast intake manifold reduces intake noise.
  • Cast iron, wet exhaust elbow for safety.


Lubrication System

  • Full flow, spin-on oil filter with bypass.
  • 10.5 qt (10.0 ltr) center well oil pan. 250 hour oil change intervals.
  • Oil drain for quick, clean oil changes.


DC Electrical System

  • DC system uses reliable relays instead of an unrepairable printed circuit board.
  • 12 volt starter motor and battery charging alternator with regulator and belt guard.
  • Standard panel: Remote mount S-3C has hour meter, stop-start switch with run light and preheat switch. Gauges for oil pressure, coolant temp and DC voltage. Safety shutdowns for low oil pressure, high coolant temp and high exhaust temp.
  • Expandable to six panels up to 110 feet from the set.
  • 20 foot (6m) plug-in panel harness lets you mount your panel anywhere onboard.


AC Generator

  • Northern Lights, direct coupled, brushless AC generator is maintence free. 4 lead, 1 phase, 50 or 60 Hz output standard. 12 wire, 3 phase optional. Conservative heat rise rating: 95oC/50oC ambient.
  • Automatic voltage regulator (AVR) is powered by dedicated AC winding for true 300% short circuit capability and circuit breaker protection. Quick ±1% RMS no load to full load voltage regulation.
  • Generator features high quality, Class “H” epoxy insulation, accessible diodes, over-sized bearings and junction box for wiring.


Special Equipment

  • Welded steel base frame with drip pan.
  • Four plateform mounts isolate vibration.
  • Belt guard protects operator.
  • White, long-life polyurethane paint.
  • Operator’s and parts manuals standard


Classification Standards

  • Consult factory for details.
  • Available for non-US flagged vessels only.

M944W3 Specifications:
60 Hz @ 1800 rpm30kW
50 Hz @ 1500 rpm26 kW
Cylinders:4 inline
Bore:3.7 in (94 mm)
Stroke:4.72 in (120 mm)
Displacement:203 cid (3.33 ltr)
Fuel System:Mechanical
Length:56.0 in (1422 mm)
Length with Enclosure:56.0 in (1422 mm)
Width:29.0 in (737 mm)
Width with Enclosure:29.0 in (737 mm)
Height:30.7 in (779 mm)
Height with Enclosure:31.5 in (800 mm)
Weight:1331 lbs (604 kg)
Sound Enclosure Weight:158 lbs (72 kg)
Information, specifications, materials and dimensions subject to change without notice.
Note: US EPA Marine Certified Tier 3 are available globally

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