M844LW3: 20/16 kW

Engine Block


• Four cycle, 4 cylinder, liquid cooled, naturally aspirated, overhead valve diesel.

• Swirl combustion chambers improve fuel efficiency and reduce smoke.

• Glow plugs for quick cold starting.


Cooling System

• One-piece heat exchanger, expansion tank and liquid cooled exhaust manifold. Fewer troublesome hoses and gaskets. Cast iron to resist corrosion and electrolysis.

• 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

• Fuel system is self-venting.

• Injection pump with 5% mechanical governor for close AC frequency control.

• Pintle injectors with replaceable tips.

• Mechanical lift pump with hand primer. No electric pump to fail.

• Large spin-on fuel filter.

• Flexible fuel lines routed to fuel manifold.

• Stop solenoid controls the fuel rack, not the throttle, to eliminate speed variances and linkage problems.


Intake and Exhaust

• 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.


Lubrication System

• Full flow, spin-on oil filter with bypass.

• 8.6 qt (8.2 ltr) oil capacity for better lubrication. 200 hour oil change intervals.

• Oil drain for quick, clean oil changes.

• Closed crankcase vent system traps oil vapor and keeps engine room clean.


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-1B has hour meter, stop-start switch with run light and preheat switch.

• 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. Better than inaccessible unit mount panels that are prone to vibration problems.

• Low oil pressure, high coolant temp and high exhaust temp safety shutdowns standard.


AC Generator

• Northern Lights, direct coupled, brushless AC generator is maintence free. 4 lead, 1 phase, 50 or 60 Hz output standard. 12 lead, 3 phase optional. Conservative heat rise rating: 95o

• 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.

• White, long-life polyurethane paint.

• Operator’s and parts manuals standard.


Classification Standards

• Consult factory for details.

M844LW3 Specifications:
60 Hz @ 1800 rpm20 Kw
50 Hz @ 1500 rpm16 Kw
Cylinders:4 inline
Bore:3.3 in (84 mm)
Stroke:3.9 in (100 mm)
Displacement:135 cid (2.2 ltr)
Fuel System:Mechanical
Length:46.0 in (1169 mm)
Length with Enclosure:46.0 in (1169 mm)
Width:22.8 in (580 mm)
Width with Enclosure:22.8 in (580 mm)
Height:27.5 in (697 mm)
Height with Enclosure:28.1 in (714 mm)
Weight:973 lbs (441 kg)
Enclosure Weight:90 lbs (40.9 kg)
Information, specifications, materials and dimensions subject to change without notice.
Note: US EPA Marine Certified Tier 3 are available globally

 Accessories and Options Request Pricing | Locate a Dealer