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M673L3 Specification Sheet

M673L3 Specification Sheet

Product catalog summary

Specifications:
The M673L3 engine offers two power outputs: 6 kW at 60 Hz and 1800 RPM, and 5 kW at 50 Hz and 1500 RPM. It operates on a single-phase with a power factor of 1.0. Voltage regulation is maintained at ±5%. The engine is a vertical inline 3-cylinder diesel with a displacement of 46.4 in³ (0.761 liters) and a bore/stroke of 2.64/2.83 inches (67/72 mm). Fuel consumption varies with load and RPM, with full load consumption at 0.59 gph (2.2 lph) at 1800 RPM and 0.50 gph (1.9 lph) at 1500 RPM.

Engine Data:
The engine block is a four-cycle, liquid-cooled, naturally aspirated diesel with overhead valves and glow plugs for quick starting. It features swirl combustion chambers for improved fuel efficiency and reduced smoke. The cooling system includes a standard heat exchanger with optional keel cooling, and a gear-driven seawater pump.

Fuel System:
The self-venting fuel system includes an inline injection pump with a mechanical governor for AC frequency control. A mechanical fuel lift pump with a hand primer is used, and flexible fuel lines are standard.

Intake and Exhaust:
The engine meets US EPA Tier III emission standards. It has a cast aluminum intake manifold with a Sound Maze system to reduce noise and a washable air cleaner. The wet exhaust elbow is made of stainless steel.

Lubrication System:
The closed crankcase vent system traps oil vapor, maintaining a clean engine room. It has a 3.1 qt (3 ltr) oil capacity and 200-hour oil change intervals.

DC Electrical System:
Features a 12-volt starter motor and battery charging alternator with a belt guard. It includes a remote mount control panel with an hour meter, stop-start switch, and preheat switch. Safety shutdowns for low oil pressure, high coolant temperature, and high exhaust temperature are standard.

AC Generator:
The generator is direct-coupled, four-pole, with Class “H” insulation and a conservative heat rise rating. It includes an automatic voltage regulator with ±5% voltage regulation, protected by a dedicated circuit breaker.

Dimensions and Weight:
The engine's approximate dry weight is 377 lbs (171 kg), with dimensions of 28.5 in length, 19.5 in width, and 20.4 in height. The sound enclosure adds 44 lbs (20 kg) and slightly increases the height.

Installation Data:
Includes a wet exhaust elbow with a 1.5-inch OD, a raw water inlet of 3/4 inch OD, and a fuel inlet and return of 1/4 inch NPT.

Contact Information:
Northern Lights, Inc., 4420 14th Ave NW, Seattle, WA 98107. Tel: (206) 789-3880, (800) 762-0165. Fax: (206) 782-5455. Email: [email protected]. Website: www.northern-lights.com.

Catalog excerpts

NORTHERN LIGHTS M673L3 6 kW (60 Hz, 1800 rpm) 5 kW (50 Hz, 1500 rpm) • Large spin-on fuel filter • One-piece heat exchanger, expansion tank and liquid cooled exhaust manifold. Cast iron to resist corrosion and electrolysis DC system uses reliable relays instead of an unrepairable printed circuit board recovery bottle clean engine ; fuel lines to base pan • Gear driven seawater pump Oil drain for quick, clean oil changes Weight and Height Approximate dry weight Length Width Height Sound enclosure weight Enclosure length Enclosure width Enclosure height Displacement Bore/Stroke HP @ RPM Approximate fuel use 2 1800 RPM @ full load 1800 RPM @ half load 1500 RPM @ full load 1500 RPM @ half load 2. Actual fuel consumption will vary depending on operating conditions. Wet exhaust elbow 1.5 inch (38 mm) OD Fuel inlet and return 1/4 inch NPT Information and dimensions are subject to change without notice.

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NORTHERN LIGHTS M673L3 6 kW (60 Hz, 1800 rpm) 5 kW (50 Hz, 1500 rpm)FEATURES AND BENEFITS Engine Block Northern Lights, Inc. 4420 14th Ave NW, Seattle, WA 98107 Tel: (206) 789-3880 | (800) 762-0165 www.northern-lights.com Fax: (206) 782-5455 Northern Lights, Lugger and Technicold are registered trademarks of Northern Lights, Inc. [email protected] © 2017 AI1 rights reserved. Litho USA. B102 6/17

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M673L3 Specification Sheet

M673L3 Specification Sheet

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