M864W3: 25/20 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. Glow plugs for quick cold starting.

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

  • Fuel system is self-venting.
  • Bosch-type in-line 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 base.
  • 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.
  • 6.9 qt (6.5 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-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 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.

M864W3 Specifications:
60 Hz @ 1800 rpm25 Kw
50 Hz @ 1500 rpm20 Kw
Cylinders:4 inline
Bore:3.4 in (86 mm)
Stroke:4.2 in (107 mm)
Displacement:152 cid (2.49 ltr)
Fuel System:Mechanical
Length:52.9 in (1350 mm)
Length with Enclosure:52.9 in (1350 mm)
Width:24.2 in (696 mm)
Width with Enclosure:24.2 in (696 mm)
Height:26.5 in (672 mm)
Height with Enclosure:27.7 in (703 mm)
Weight:993 lbs (450 kg)
Enclosure Weight:140 lbs (64 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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