Northern Lights M673LD3 Marine Generator

Features and Benefits

Engine Block
Four cycle, 3 cylinder, liquid cooled, naturally aspirated, overhead valve diesel with glow plugs for quick starting. Swirl combustion chambers improve fuel efciency and reduce smoke.

Cooling System
Standard heat exchanger cooling with optional keel cooling. Copper-nickel, tubetype heat exchanger has removable rubber end caps for easy cleaning, and no need for zincs. The bronze and stainless steel seawater pump with rubber impeller is gear driven, eliminating a potential failure point.

Fuel System
The self-venting fuel system features an inline injection pump with 3-5% mechanical governor for close AC frequency control. Stop solenoid acts directly on the fuel rack eliminating external linkage problems. The fuel lift pump is mechanical with a hand primer, eliminating electronic pump failures. Flexible fuel lines plumbed to base pan as standard.

Intake and Exhaust
The M673LD3G meets US EPA Tier III at 60 Hz and IMO Tier II at 50 Hz emission standards. Its cast aluminum intake manifold with Sound Maze system reduces noise, and its washable air cleaner makes routine maintenance simple. The wet exhaust elbow is stainless steel.

Lubrication System
The closed crankcase vent system traps oil vapor and keeps engine room clean. 3.1 qt (3 ltr) oil capacity for better lubrication and 200 hour oil change intervals. Oil drain hose allows for ease of maintenance.

DC Electrical System
The DC System features a 12 volt starter motor and battery charging alternator with belt guard. The set is equipped with a standard remote mount control panel, featuring an hour meter, stop-start switch with run light and a preheat switch, and includes a 20 foot (6m) harness. The standard panel can be expanded to six panels, up to 110 feet from the set. Low oil pressure, high coolant temperature and high exhaust temperature safety shutdowns are standard.

AC Generator
The Northern Lights, direct coupled, four pole, four lead generator has Class “H” insulation, a pre-lubricated bearing and features a conservative heat rise rating of 95°C/50°C ambient. Our automatic voltage regulator gives you ±5% voltage regulation. The AVR protected by a dedicated circuit breaker.

Specification:

AC Output
5 kW: 60 Hz, 1800 RPM, 1 Ph, 1.0 PF, 240 V/20.8 A, 120 V/41.6 A
4.5 kW: 50 Hz, 1500 RPM, 1 Ph, 1.0 PF, 220 V/20.5 A
Voltage regulation: ±5%

Weight and Height
Approximate dry weight: 371 lbs (168 kg)
Length: 27.5 in (698 mm)
Width: 16.7 in (426 mm)
Height: 20.5 in (521 mm)
Sound enclosure weight: 34 lbs (15.4 kg)
Enclosure length: 28.5 in (724 mm)
Enclosure width: 19.6 in (498 mm)
Enclosure height: 21.0 in (532 mm)

Engine Data
Type: Vertical inline 3 cylinder diesel
Displacement: 46.4 in3 (0.761 ltr)
Bore/Stroke: 2.64/2.83 in (67/72 mm)
HP @ RPM: 10.1/1800 8.4/1500
Approximate fuel use :
1800 RPM @ full load: 0.59 gph (2.2 lph)
1800 RPM @ half load: 0.32 gph (1.2 lph)
1500 RPM @ full load: 0.50 gph (1.9 lph)
1500 RPM @ half load: 0.28 gph (1.1 lph)

Installation Data
Wet exhaust elbow: 1.5 inch (38 mm) OD
Raw water inlet: 3/4 in (19 mm) OD
Fuel inlet and return: 1/4 NPT