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M673LD3 Specification Sheet

M673LD3 Specification Sheet

Product catalog summary

Specifications:
The M673LD3 generator offers two power outputs: 5 kW at 60 Hz and 1800 RPM, and 4.5 kW at 50 Hz and 1500 RPM. It operates on a single-phase with a power factor of 1.0. Voltage options include 240 V/20.8 A and 120 V/41.6 A for 60 Hz, and 220 V/20.5 A for 50 Hz. Voltage regulation is maintained at ±5%.

Engine Data:
The engine is a vertical inline 3-cylinder diesel with a displacement of 46.4 in³ (0.761 liters). It has a bore/stroke of 2.64/2.83 inches (67/72 mm) and produces 10.1 HP at 1800 RPM and 8.4 HP at 1500 RPM. Fuel consumption varies with load and RPM, with full load at 1800 RPM using 0.59 gph (2.2 lph) and half load using 0.32 gph (1.2 lph).

Dimensions and Weight:
The generator's dry weight is approximately 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 to 20.9 inches.

Installation Data:
Key installation features include a 1.5-inch wet exhaust elbow, a 3/4-inch raw water inlet, and a 1/4-inch NPT fuel inlet and return.

Features and Benefits:
The M673LD3 is equipped with a large spin-on fuel filter, flexible fuel lines, a one-piece heat exchanger, and a DC system with reliable relays. It includes a full-flow spin-on oil filter, a coolant recovery bottle, and a gear-driven seawater pump. The engine block is a four-cycle, 3-cylinder, liquid-cooled diesel with swirl combustion chambers for improved efficiency.

Cooling and Fuel Systems:
The cooling system features a standard heat exchanger with optional keel cooling. The fuel system includes a self-venting inline injection pump and a mechanical fuel lift pump with a hand primer.

Intake, Exhaust, and Lubrication:
The intake manifold reduces noise, and the wet exhaust elbow is stainless steel. The lubrication system has a closed crankcase vent and a 3.1 qt oil capacity, allowing for 200-hour oil change intervals.

Electrical Systems:
The DC electrical system includes a 12-volt starter motor and battery charging alternator. The AC generator features a four-pole, four-lead design with Class “H” insulation and a conservative heat rise rating. An automatic voltage regulator ensures ±5% voltage regulation.

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

5 kW (60 Hz, 1800 rpm) 4.5 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 • Coolant recovery bottle ensures clean engine room • Full ﬂow, spin-on oil ﬁlter with bypass • Flexible fuel lines routed to base pan • Gear driven seawater pump • Oil drain for quick, clean oil changes SPECIFICATIONS AND DIMENSIONS Engine Data Type Bore/Stroke Voltage regulation Vertical inline 3 cylinder diesel Approximate fuel use 2: 1800 RPM @ full load Weight and Height Approximate dry weight Sound enclosure weight 2. Actual fuel consumption will vary depending on operating conditions. Installation Data Enclosure length Enclosure width Enclosure height Fuel inlet and return Consult factory for classification society. US EPA Tier III Information and dimensions are subject to ch

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NORTHERN LIGHTS M673LD3 5 kW (60 Hz, 1800 rpm) 4.5 kW (50 Hz, 1500 rpm)FEATURES AND BENEFITS Engine Block www.northern-lights.com Northern Lights, Lugger and Technicold are registered trademarks of Northern Lights, Inc. © 2017 All rights reserved. Litho USA. B101 6/17

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M673LD3 Specification Sheet

M673LD3 Specification Sheet

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