M20CRW3: 20 kW @ 1800rpm

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
• Jacket-water cooling system in heat exchanger or keel cooled confi guration.
• One-piece heat exchanger housing, expansion tank and liquid cooled exhaust manifold. Fewer troublesome hoses and gaskets. Cast iron to resist corrosion and electrolysis.
• Keel cooling confi guration is standard
• Heat exchanger cooling is optional. Cupro-nickel, tube-type heat exchanger element can be removed for easy cleaning. Easily accessible, rubber impeller seawater pump of bronze and stainless steel is gear driven; no pump drive belts to fail. Cast-iron wet exhaust elbow is included.

AC Generator
• Northern Lights, direct coupled, brushless AC generator is maintenance free. 12 lead design is reconnectable for 1 or 3 phase,
60 Hz output. Conservative heat rise rating: 95°C/50°C ambient.
• Automatic Voltage Regulator (AVR) is powered by dedicated AC winding for true 300% short circuit capability. Quick ±1% RMS no load to full load voltage regulation. AVR has circuit breaker protection.
• Generator features high quality Class “H” epoxy insulation, accessible diodes, over-sized bearing and junction box for wiring.
Intake and Exhaust
• Meets US EPA Tier III emission requirements for a cleaner environment.
• Disposable dry air cleaner.
• 1 1/2 inch NPT exhaust outlet.
Lubrication System
• Full flow, spin-on oil filter with bypass.
• 8.6 qt. (8.2 ltr) oil capacity for better lubrication. 200 hr oil change intervals.
• Oil drain for quick, clean oil changes.
• Closed crankcase vent system keeps oil vapor inside engine for clean engine room.
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.
• Stop solenoid controls the fuel rack, not throttle, to eliminate speed variance and linkage problems.
DC Electrical System
• DC system uses reliable relays instead of 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 and volt meters, oil pressure and coolant temperature gauges, stop-start switch and preheat switch.
• 20 foot (6 m) plug-in panel harness lets you mount your panel anywhere on board. DC system is expandable to six panels up to 110 feet from the set.
• Low oil pressure and high coolant temperature shutdowns are standard.
Special Equipment
• Rigid welded steel base frame.
• Four plateform mounts isolate vibration.
• Tough gray enamel paint for long life fi nish.
• Operator’s and parts manuals standard.

M20CRW3 Specifications
60 Hz / 1800 rpm:20 kW
Cylinders:4 inline
Bore:3.3 in (84 mm)
Stroke:3.9 in (100 mm)
Displacement:135 cid (2.2 ltr)
Fuel Systems:Mechanical
Length:43.2 in (1098 mm)
Width:20.7 in 526 mm)
Height:32.8 in (833 mm)
Weight:820 lbs (372 kg)
Information, specifications, materials and dimensions subject to change without notice.



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