M773LW3: 9/7 kW


Engine Block

  • Four cycle, 3 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

  • Freshwater cooling system in heat exchanger or keel cooled configuration.
  • 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 noise.
  • Cast iron, wet exhaust elbow for safety.


Lubrication System

  • Full flow, spin-on oil filter with bypass.
  • 4.2 qt (4 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 maintenance free. 4 lead, 1 phase, 50 or 60 Hz output standard. 12 lead, 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.
  • White, long-life polyurethane paint.
  • Operator’s and parts manuals standard.


Classification Standards

  • Consult factory for details.


M773LW3 Specifications:
60 Hz @ 1800 rpm9 Kw
50 Hz @ 1500 rpm7 Kw
Cylinders:3 inline
Bore:3.03 in (77 mm)
Stroke:3.19 in (81 mm)
Displacement:69 cid (1.13 ltr)
Fuel System:Mechanical
Length:35 in (889 mm)
Length with Enclosure:35 in (889 mm)
Width:22.0 in (559 mm)
Width with Enclosure:22.0 in (559 mm)
Height:23.8 in (604 mm)
Height with Enclosure:24.2 in (614 mm)
Weight:537 lbs (224 kg)
Enclosure Weight60 lbs (27.2 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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