M944W3: 30-26 kW Northern Lights marine generator set

Product catalog summary

Engine Block
The M944W3 features a four-cycle, 4-cylinder, liquid-cooled, naturally aspirated, overhead valve diesel engine. It includes an induction hardened crankshaft made of forged carbon steel, which is stronger than cast iron. The engine uses helical cut and ground carbon steel timing and PTO gears to reduce noise and a cross-flow head for efficient breathing.

Cooling System
The engine is equipped with a freshwater cooling system available in heat exchanger or keel cooled configurations. The exhaust manifold is freshwater cooled for safety, reducing the risk of hot, dry risers and minimizing the number of hoses and gaskets. It is made of cast iron to resist corrosion and electrolysis, with zinc anode protection. The standard heat exchanger is a cupro-nickel tube-type with removable ends for easy cleaning, and the seawater pump is gear-driven, eliminating the need for a belt.

Fuel System
The fuel system includes IDI with glow plugs and a Bosch-type in-line injection pump with a 5% mechanical governor for precise AC frequency control. It features pintle injectors, a mechanical lift pump with a hand primer, and a large spin-on fuel filter. Flexible fuel lines are routed to the base, and a stop solenoid controls the fuel rack to eliminate speed variances and linkage problems.

Intake and Exhaust
The engine meets US EPA Tier III emission standards. It has a washable air cleaner in a cast intake manifold to reduce intake noise and a cast iron, wet exhaust elbow for safety.

Lubrication System
The lubrication system includes a full-flow, spin-on oil filter with a bypass and a 10.5 qt (10.0 ltr) center well oil pan, allowing for 250-hour oil change intervals. An oil drain facilitates quick and clean oil changes.

DC Electrical System
The DC system uses reliable relays instead of an unrepairable printed circuit board. It includes a 12-volt starter motor and battery charging alternator with a regulator and belt guard. The standard panel is remote mountable and includes an hour meter, stop-start switch with run light, preheat switch, and gauges for oil pressure, coolant temperature, and DC voltage. Safety shutdowns are in place for low oil pressure, high coolant temperature, and high exhaust temperature.

AC Generator
The Northern Lights direct-coupled, brushless AC generator is maintenance-free, offering 4 lead, 1 phase, 50 or 60 Hz output as standard, with a 12 wire, 3 phase optional. It features an automatic voltage regulator powered by a dedicated AC winding for true 300% short circuit capability and circuit breaker protection, with quick ±1% RMS no-load to full-load voltage regulation.

Special Equipment
The unit includes a welded steel base frame with a drip pan, four platform mounts to isolate vibration, a belt guard for operator protection, and is painted with long-life polyurethane paint. Operator’s and parts manuals are standard.

Classification Standards
For detailed classification standards, consult the factory.

Dimensions and Output
The M944W3 has overall dimensions of 56.0 x 29.0 x 30.7 inches (1422 x 737 x 779 mm) and a sound enclosure weight of 158 lbs (72 kg). It provides an AC output of 30 kW at 60 Hz and 26 kW at 50 Hz, with optional three-phase output. The engine type is a vertical inline 4-cylinder diesel with a displacement of 203 in3 (3.3 ltr) and a bore/stroke of 3.70/4.72 inches (94/120 mm). Fuel consumption varies with load and RPM.

Catalog excerpts

M944W3: 30-26 kW Northern Lights marine generator set-1

M944W3 Specifications and Dimensions Dimensional Drawing Three Phase with 0.8 PF Voltage regulation Lugger L944 Engine Type Vertical inline 4 cylinder diesel Approximate fuel use 1800 RPM @ full load2 Installation Data & Weight Wet exhaust elbow Fuel inlet and return Approximate dry weight M944W3 Overall Dimensions L x W x H: 56.0 x 29.0 x 30.7 inch (1422 x 737 x 779 mm) Sound Enclosure Dimensions L x W x H: 56.0 x 29.0 x 31.5 inch (1423 x 737 x 800 mm) Sound Enclosure Weight: 158 lbs. (72 kg) Dimensions given in inches (mm). Dimensions subject to change without notice. Contact dealer or visit www.northern-lights.com for most current installation drawings. 1. Based on SAE J1995 and ISO 3046. 2. Actual fuel consumption will vary depending on operating conditions 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 lter. • Flexible fuel lines routed to base. • Stop solenoid controls the fuel rack, not the throttle, to eliminate speed variances and linkage problems. • Meets US EPA Tier III emission standards at date of manufacture. • Washable air cleaner in cast intake manifold reduces intake noise. • Cast iron, wet exhaust elbow for safety. www.northern-lights.com Dealer M944W3 Features and Benefits Lubrication System • Full ow, spin-on oil lter 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 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. • 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: 95oF/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. 4420 14th Ave. NW., Seattle WA 98107 Tel: 206-789-3880 • 1-800-762-0165 • Fax: 206-782-5455 Information and dimensions subject to change without notice. Northern Lights and Lugger are registered trademarks of Northern Lights, Inc. © 2012 All rights reserved. Litho USA. S108 5/12

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