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Northern Lights M773L Generator Set

The Northern Lights M773L is a 9 kW diesel standby generator set powered by a Northern Lights 773LK engine. It is available at 127 V and 288 V, 3-phase, 60 Hz and rated 75 A. It holds about 4.2 L (1.1 gal) of oil. The set measures 831×548×718 mm (32.7×21.6×28.3 in) and weighs about 244 kg (538 lb).

9 kW
Standby
4.2 L
Oil capacity
4
Document types

How to read your Northern Lights serial & model number →

Typical fuel consumption for 5–10 kW Diesel generators →

Compare with other 5–10 kW Diesel generators →

Service parts for the M773L

Grouped by system, with how many of each the parts manual calls for.

Air intake

1 required

Fuel system

1 required

Oil system

1 required

Belts

1 required

Prices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.

Specifications

Fueldiesel
Frequency60.0 Hz
Standby power9 kW
Prime power7 kW
EmissionsUS EPA Tier III
ControllerTSC (OPTIONAL)
Oil capacity4.2 L
AlternatorPX309K
Voltage options120 V, 240 V
Phase1
Rated current[75, 31.8] A
Power factor1
Starting system12 V DC
Dimensions (L×W×H)831×548×718 mm
Dry weight244 kg

Maintenance & consumables

for the Northern Lights 773LK
ItemSpecCapacityPart #Interval
Air filterInspeccione el fi ltro del aire. •24-2860213 hr Amazon eBay
Fuel filterlarge spin-on fuel filter24-52020100 hr Amazon eBay $24.71 NAPA $15.34
Oil filterfull flow, spin-on oil filter with bypass24-02001100 hr Amazon eBay $23.45 NAPA $9.09
Battery—
BeltInspeccione la tensión de la correa trapezoidal. • Verifi que los ajustes de las válvulas. •40-08601100 hr Amazon eBay $122.00
Coolant—
Coolant filter—
Oil4.2 qt—200 hr
Spark plugInspeccione la condición de las baterías con un hidrómetro. • Verifi que el nivel de electrolito en las baterías. • Verifi que el electrolito de las baterías. •—100 hr

Service intervals

32
ItemActionHoursMonthsNotes
Aceite del motor y filtroChange50 hrFirst service — Período de adaptación; también a las 100 horas (PS2/PS3)
Ajustes de las válvulasAdjust50 hrFirst service — PS6; después de las primeras 50 horas
Nivel de electrolito de las bateríasCheck50 hr1 moPS18
Tensión de la correa trapezoidalInspect50 hrPS5
Aletas del radiadorClean100 hrPS16; sólo equipos industriales
V-belt tensionCheck100 hrSP6 per schedule summary; SP-5 text calls for daily check
battery electrolyte levelCheck100 hrSP17
Aceite del motorChange200 hrPS2; cada 100 horas o 6 semanas en tiempo frío, lo que llegue primero
Filtro del aireInspect200 hrPS4; más a menudo bajo condiciones de mucho polvo
Filtro primario del combustible (marca Racor)Change200 hrPS8; o cuando sea necesario
Filtro secundario del combustibleChange200 hrPS9
Filtros del aceite lubricanteChange200 hrPS3
air cleanerCheck200 hrSP4; check more often in dusty conditions
battery conditionCheck200 hrSP18 per schedule summary; battery care text gives hydrometer check every 500 hours
engine oil and filterChange200 hrFirst service — Every 200 hours (SP2/3); cold intermittent operation: every 100 hours or six weeks
exhaust elbowInspect500 hrSP16; sooner if needed; replace if rust or damage
primary fuel filter elementChange500 hrSP8; or as often as necessary
raw water pump impellerChange500 hrSP15; or as needed
secondary fuel filterChange500 hrSP9; or as necessary
Ajustes de las válvulasInspect600 hrPS6; cada 600 horas / anualmente
Condición de las baterías (hidrómetro)Test600 hrPS19
InyectoresInspect600 hrPS11
Rodete de la bomba del agua brutaChange600 hrPS17; sólo equipos marinos, o cuando sea necesario
Sistema refrigeranteClean600 hr12 moPS14; limpie con agua cada 600 horas o cada 12 meses, lo que llegue primero
air cleaner elementChange1000 hr24 moEvery 1000 hours or two years, whichever comes first
injectorsCheck1000 hrSP12; clean injection nozzles every 1500 hours
valve clearanceAdjust1000 hrSP6; after 1000 hours or as needed
Bomba de inyección del combustibleInspect2400 hrPS12
Cambiador de calorClean2400 hr12 moPS15; sólo equipos marinos
cooling systemOther2500 hr24 moSP11 check and flush; every 2500 hours or every 24 months, whichever comes first
fuel injection pumpCheck2500 hrSP13; settings, max speed, idle speed and exhaust smoke
heat exchangerClean2500 hr24 moSP14; every 24 months, or after 2500 hours, or as needed

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Service specifications

26
TypeItemValueUnitCondition
ClearanceCoolant level below filler cap sealing surfaceabout 1 in. (2.5 cm)in. (cm)engine cold
ClearanceDeflexión de la correa trapezoidal3/16pulgada (5 mm)punto céntrico entre el cigüeñal y las poleas del alternador
ClearanceV-belt deflection at midpoint between crankshaft and alternator pulleys3/16 in. (5 mm)in. (mm)
GapValve clearance, intake and exhaust0.008 in. (0.2 mm)in. (mm)
PressureEngine oil pressure (Operating)above 15 PSIPSIgauges checked often while operating
PressureEngine oil pressure normal reading20-60 PSIPSIafter a few seconds of operation
PressureExpansion tank filler cap release pressure7 PSI (0.5 bar)PSI (bar)
PressurePresión del aceite (operación)arriba de 15PSI
PressurePresión del aceite normal20-60PSI
PressureVálvula de presión del tapón del refrigeranteaproximadamente 7PSI (0.5 bar)
ResistanceGlow plug resistance between terminal and engine blockunder 1 ohmohm
SpeedVelocidad del motor1200 ó 1800 (60 Hz) ó 1500 (50 Hz)RPM
TemperatureCoolant temperature gauge normal range167°F and 194°F (75°C to 90°C)°F (°C)operating
TemperatureHigh water temperature shutdown threshold205°F (96°C)°F (°C)marine units
TemperatureRestart temperature after overheatbelow 200°F (94°C)°F (°C)
TemperatureTemperatura de parada de emergenciaarriba de 205°F (96°C)
TemperatureTemperatura del agua (operación)bajo 200°F (94°C)
TorqueInjector43 or 50 ft/lbs (6 to 7 kgm)ft/lbs (kgm)
TorqueInjector return line retaining bolts22 - 30 ft/lbsft/lbs
TorqueInyector43 a 50libras por pie (6 a 7 kgm)
TorqueRocker arm cover nuts5 - 8 ft/lbs (0.8 - 2.3 kg/m)ft/lbs (kg/m)
TorqueTornillos de retención del tubo de retorno de combustible22 - 30libras por pie (3.0 - 4.1 kgm)
TorqueTuercas de la tapa del balancín5 - 8libras por pie (0.8 - 2.3 kg)
Valve clearanceHuelgo de válvulas de admisión y escape0.008pulgada (0.2 mm)motor frío y parado
VoltageDC voltmeter readingbetween 11 and 15 voltsvoltsat 80°F (25°C) ambient temperature
VoltageVoltímetro CC11 y 15voltiostemperatura ambiente de 80°F (25°C)

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Recommended fluids

FluidGradeStandardAmbientCapacityNotes
Coolant50% water / 50% ethylene glycol antifreeze mixNot methyl alcohol based antifreeze; antifreeze with high silicate should not be used. Distilled or soft water preferred
CoolantMezcla 50% agua / 50% etilenglicol (anticongelante)Recomendado para todo el año
Engine oilSAE 5W sencilla / SAE 5-20W múltipleAPI Servicio CC/CD/CE (sencilla); API Servicio CC/CD/SF (múltiple)below -23°CBajo -10°F (-23°C); puede aumentar el consumo de aceite. Nunca agregue aditivos ni aceite limpiador.
Engine oilSAE 5W single viscosity / SAE 5-20W multi-viscosityAPI Service CC/CD/CE single viscosity; API Service CC/CD/CF multi-viscositybelow -23°CBelow -10°F (-23°C); some increase in oil consumption may be expected with SAE 5W and SAE 5-20W oils
Engine oilSAE 10W sencilla / SAE 10-30W múltipleAPI Servicio CC/CD/CE (sencilla); API Servicio CC/CD/SF (múltiple)-23°C to 0°C-10 a 32°F (-23 a 0°C)
Engine oilSAE 10W single viscosity / SAE 10-30W multi-viscosityAPI Service CC/CD/CE single viscosity; API Service CC/CD/CF multi-viscosity-23°C to 0°C-10 to 32°F (-23 to 0°C)
Engine oilSAE 30W sencilla / SAE 15-40W múltipleAPI Servicio CC/CD/CE (sencilla); API Servicio CC/CD/SF (múltiple)above 0°C4.0 litrosArriba de 32°F (0°C)
Engine oilSAE 30W single viscosity / SAE 15-40W multi-viscosityAPI Service CC/CD/CE single viscosity; API Service CC/CD/CF multi-viscosityabove 0°C4.9 litersAbove 32°F (0°C). Engine capacity with new oil filter: 4.75 quarts (4.9 liters) - M773LW3(G)
FuelDiesel grado No. 1ASTM D975below 0°CBajo el punto de congelación y en altitudes de más de 5.500 pies (1.500 m)
FuelGrade No. 2 diesel above freezing 32°F (0°C); Grade No. 1 below freezing and at altitudes above 5,500 ft. (1500 meters)ASTM designation D975; low or ultra low sulphur; cetane number minimum of 45Do not use domestic heating oils, Class B engine, Class D domestic fuels, Class E/F/G/H industrial or marine fuels, ASTM-D975-60T No. 4-D and higher
FuelDiesel grado No. 2 (ASTM D975)ASTM D975; número de cetano mínimo 45; menos del 1% de azufre (preferible menos del 0.5%)above 0°CArriba de 32°F (0°C)

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Procedures

12
Ajuste de las válvulas adjustment

Tools: Juego de galgas

  1. Ajuste las válvulas después de las primeras 50 horas y cada 600 horas.
  2. El motor debe estar frío y parado.
  3. Gire el cigüeñal hasta que la válvula de admisión empiece a abrir y la de escape a cerrar.
  4. Gire el cigüeñal una vuelta completa más y ajuste ambas válvulas de ese cilindro.
  5. Afloje la tuerca de retención y ajuste el huelgo con el tornillo de ajuste.
  6. Repita los pasos para cada cilindro.
  7. Vuelva a poner la tapa del balancín y apriete las tuercas.
Valve Clearance Adjustment adjustment

Tools: feeler gauge, wrench

  1. Remove the rocker arm cover.
  2. Bring No. 1 cylinder to top dead center on compression: align crank pulley top mark with timing gear case mark.
  3. Loosen the lock nut and adjust clearance between rocker arm and valve guide for intake and exhaust to 0.008 in. (0.2 mm).
  4. Repeat for each cylinder; each set of valves must be adjusted individually.
  5. Replace rocker arm cover and tighten cover nuts to 5 - 8 ft/lbs (0.8 - 2.3 kg/m).
Verificación de las bujías de calentamiento diagnostic

Tools: Bombilla de prueba CC

  1. Afloje el cable portador de corriente entre el polo positivo de la batería y el polo positivo de la bujía.
  2. Conecte una bombilla de prueba CC entre el polo positivo de la batería y el polo positivo de la bujía.
  3. Si la bombilla se prende, la bujía funciona apropiadamente.
  4. Verifique todas las bujías y cambie las defectuosas.
Bleeding the Fuel System maintenance

⚠ Escaping diesel fuel under pressure can penetrate skin; relieve pressure before disconnecting lines.

Tools: wrench, cardboard

  1. Loosen bleed bolt A on top of the filter.
  2. Pump hand primer B on the fuel lift pump until pure fuel without bubbles escapes; tighten bleed screw A.
  3. Loosen bleed screw C, pump hand primer until pure fuel escapes, then tighten.
  4. If the engine will not start, loosen a fuel line at the injector and crank until pure fuel escapes, then tighten.
  5. After the engine starts, use a piece of cardboard to look for fuel leaks.
Cambio del aceite del motor maintenance

⚠ Nunca utilice ningún aceite limpiador.

⚠ Tire el aceite de desperdicio de manera apropiada.

  1. Cambie el aceite y el filtro después de las primeras 50 horas.
  2. Use aceite de Servicio CC de peso 30 durante las primeras 100 horas.
  3. Cambie el aceite y el filtro de nuevo a las 100 horas; después cada 200 horas.
  4. Quite el tapón del tubo de drenaje y vacíe el aceite; vuelva a poner el tapón y el tubo.
  5. Cambie el aceite cuando el motor esté cálido.
  6. Vuelva a llenar el motor con el aceite recomendado.
Cambio del filtro del aceite maintenance

⚠ El apretar demasiado puede causar daño en la caja del filtro.

Tools: Llave de filtro

  1. Cambie el filtro cada 200 horas.
  2. Quite el filtro gastado con una llave de filtro y tirelo apropiadamente.
  3. Asegúrese de quitar y tirar el empaque gastado; limpie la superficie de la base.
  4. Extienda una capa delgada de aceite en el empaque de goma del filtro nuevo.
  5. Enrósquelo hasta que el empaque toque la superficie selladora; apriete media vuelta más sólo con las manos.
  6. Arranque el motor, verifique que no haya pérdidas, pare y verifique el nivel.
Cambio del rodete de la bomba del agua bruta maintenance

⚠ Ponga material protector debajo de los desarmadores para no dañar la caja de la bomba.

⚠ Mantenga a bordo un rodete y una junta de cubierta de reserva.

Tools: Alicates puntiagudos, Dos desarmadores

  1. Cambie el rodete cada 600 horas o como sea necesario.
  2. Quite la cubierta del extremo de la bomba.
  3. Quite el rodete con alicates puntiagudos o dos desarmadores; quite todos los pedazos.
  4. Limpie la parte interior de la caja.
  5. Presione adentro el rodete nuevo y ponga la arandela selladora.
  6. Vuelva a poner la cubierta utilizando una junta nueva.
Changing Lube Oil Filter maintenance

⚠ Overtightening can damage the filter element.

Tools: filter wrench

  1. Use a filter wrench to remove the old filter and dispose of it properly.
  2. Make sure the old gasket is removed and discarded; clean the mounting surface.
  3. Spread a thin film of engine oil on the new filter's rubber gasket.
  4. Screw the filter on the nipple until the gasket meets the sealing surface.
  5. Using hands only, tighten one-half turn farther.
  6. Fill engine with oil, start and check for leaks; stop, wait 3 minutes and check level.
Cooling System Flushing maintenance

⚠ Close the sea-cock before working on the engine cooling system.

⚠ Do not open the filler cap when the engine is warm.

  1. Remove expansion tank cap and drain the engine block.
  2. Open block drain cock and remove the plug in the lower left side of the heat exchanger tank.
  3. Pour clean water into the expansion tank until water from the drains is free of discoloration and sediment.
  4. Let water drain completely, close drains and refill with recommended mixture.
  5. Check hoses and connections and repair any leakage.
Correas trapezoidales maintenance
  1. Verifique la tensión y el desgaste de la correa después de cada 50 horas.
  2. Presione con el pulgar en el punto céntrico entre el cigüeñal y las poleas del alternador.
  3. La tensión está correcta si la correa puede ser presionada 3/16 de pulgada (5 mm).
Heat Exchanger Cleaning maintenance

Tools: metal rod

  1. Drain expansion tank and heat exchanger.
  2. Remove heat exchanger end covers and remove the core.
  3. Clean the inside of the core tubes using a metal rod; flush, inspect and clean again if necessary.
  4. Reassemble, fill the cooling system, start the engine and check for leaks.
Oil Change maintenance

⚠ Never put additives or flushing oil in crankcase.

⚠ Dispose of waste oil in an approved manner.

  1. Change oil when engine is warm.
  2. Loosen the clamp on the oil change tube and remove the cap; drain oil.
  3. Replace the cap and tube.
  4. Refill engine with recommended oil; capacity with new filter is 4.9 liters (4.75 quarts).

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Common questions

What is the power rating of the Northern Lights M773L?

The Northern Lights M773L is rated 9 kW standby.

What engine is in the Northern Lights M773L?

The Northern Lights M773L is powered by the Northern Lights 773LK engine.

Is the Northern Lights M773L diesel or gas?

The Northern Lights M773L runs on diesel.

How much oil does the Northern Lights M773L take?

The Northern Lights M773L has an engine oil capacity of 4.2 liters (4.4 US quarts), per the manufacturer specification sheet.

What is the continuous rating of the Northern Lights M773L?

The Northern Lights M773L is rated 7 kW prime, against 9 kW standby.

What is the dry weight of the Northern Lights M773L?

The Northern Lights M773L has a dry weight of 244 kg (537 lb).

What voltage does the Northern Lights M773L produce?

The Northern Lights M773L is offered in 120 V, 240 V, 1-phase.

Which alternator is fitted to the Northern Lights M773L?

The Northern Lights M773L uses a PX309K alternator.

What oil filter does the Northern Lights M773L use?

The Northern Lights M773L uses oil filter part number 24-02001.

Which fuel filter part number does the Northern Lights M773L take?

The Northern Lights M773L uses fuel filter part number 24-52020.

What air filter does the Northern Lights M773L use?

The Northern Lights M773L uses air filter part number 24-28602.

Parts

250
Part #DescriptionQtySystem
00-08601Belt Guard1Belt Amazon eBay
025100006Seal Washer1Seal Amazon eBay
025100016Seal Washer1Seal Amazon eBay
050209107Oil Seal1Seal Amazon eBay FridayParts $44.63
052100030O-ring1Seal Amazon eBay
052100050O-ring1Seal Amazon eBay
052100070O-ring1Seal Amazon eBay
052100100O-Ring2Seal Amazon eBay
052100120O-ring1Seal Amazon eBay
052100400O-ring1Seal Amazon eBay $6.95
052109076O-ring1Seal Amazon eBay
052109078O-ring, Relief Valve1Seal Amazon eBay
052109099Gasket1Gasket Amazon eBay
052109101Gasket1Gasket Amazon eBay
052109108O-ring, Governor Shaft2Seal Amazon eBay
052109109O-ring1Seal Amazon eBay
052109110O-ring1Seal Amazon eBay
052300400O-ring1Seal Amazon eBay
052300700O-ring, Gear Case Cover1Seal Amazon eBay $10.95
068115200Tube1Hose Amazon eBay
10-28603Cover, Lower Air Intake with 1-3/8" Hose Barb1Hose Amazon eBay
11-08601Gasket, Exhaust1Gasket Amazon eBay
11-12005Oil Fill Neck Gasket1Gasket Amazon eBay
11-18602Gasket, Thermostat Cover1Gasket Amazon eBay
11-28601Gasket, Air Filter Housing Cover1Gasket eBay
11-28602Gasket, Air Filter Housing Lower Intake Cover1Gasket eBay
11-31902Gasket1Gasket Amazon eBay
110996800Gasket1Gasket Amazon eBay
111147560Head Gasket; t = 1.21Gasket Amazon eBay FridayParts $27.43
111147570Head Gasket; t = 1.31Gasket Amazon eBay FridayParts $44.00
111996420Gasket, Rocker Arm Cover1Gasket Amazon eBay $19.95
120406050Valve Guide Seal - Exhaust3Seal Amazon eBay FridayParts $31.49
120406070Valve Guide Seal - Intake3Seal Amazon eBay $15.95 FridayParts $31.49
120996150Gasket, Rocker Arm Bracket1Gasket eBay
130306190Fuel Filter Assembly1Fuel filter Amazon eBay $69.99 FridayParts $34.80 KuduParts $55.00
130326051Gasket5Gasket Amazon eBay
130506140Feed Pump Assembly1Pump Amazon eBay $99.99 FridayParts $33.08
130516069Gasket4Gasket Amazon eBay $6.95
130516089Gasket1Gasket Amazon eBay
130516101Gasket1Gasket eBay
130996130Gasket1Gasket Amazon eBay $15.00
131017920Injection Pump Assembly1Pump Amazon eBay
131017921Injection Pump Assembly1Pump Amazon eBay FridayParts $617.36
131226180O-ring1Seal Amazon eBay
131406340Injector Assembly3Injector Amazon eBay $30.59 FridayParts $91.99
131406560Injector Assembly3Injector eBay FridayParts $145.00
131416150Nozzle1Injector Amazon eBay
131416250Nozzle1Injector eBay FridayParts $97.99
131426200Gasket3Gasket Amazon eBay $9.95
131426210Gasket1Gasket Amazon eBay
135996541Gasket1Gasket eBay
135996900Gasket1Gasket eBay
135996930Gasket1Gasket Amazon eBay
135996940Gasket1Gasket Amazon eBay
140116140Oil Pump Cover1Pump Amazon eBay
140546020Filter Joint1Gasket Amazon eBay
140606701Oil Line1Hose Amazon eBay
140986830Oil Hose (Marine)1Hose Amazon eBay
140996260Gasket4Gasket Amazon eBay
140996270Gasket, Valve Assembly4Gasket Amazon eBay $7.95
145017870Coolant Pump Assembly1Pump eBay $200.00 FridayParts $57.50
145017910Coolant Pump Assembly1Pump Amazon eBay $180.00
145206022Thermostat1Thermostat Amazon eBay FridayParts $14.44
145206210Thermostat1Thermostat eBay $20.00 FridayParts $14.44
145996830Gasket1Gasket Amazon eBay $195.00
145996840Gasket1Gasket eBay
145996850Gasket, Thermostat Cover1Gasket eBay
16-08601O-ring1Gasket Amazon eBay
16-13101O-ring1Seal Amazon eBay $9.95
165996520Gasket, Front Plate1Gasket Amazon eBay
165996530Gasket1Gasket Amazon eBay
18-18601Coolant Pump Inlet Hose1Hose Amazon eBay
18-18602Hose 5/16" ID x 28" Polyvinyl1Hose Amazon eBay
18-18604Hose, Coolant Pump Inlet1Hose eBay
18-18605Hose, Expansion Tank Outlet1Hose eBay
18-18606Hose, 1/2” I.D. x 3-1/2” 3 Ply Silicone1Hose eBay
18-28201Hose 1-5/8" ID x 1-3/4" 3 Ply Silicone1Hose eBay
18-28601Hose, Air Intake1Hose Amazon eBay
18-28602Hose, Air Intake Snorkel1Hose eBay
18-50007Hose Assy 5/16”ID X 12” 5/16FMS X 5/16FMS1Hose eBay
18-58602Hose Assembly 1/4" ID x 12-1/2”1Hose eBay
18-58603Hose Assembly 1/4" ID x 19”1Hose eBay
18-58604Hose Assembly 1/4” ID x 12-1/2”1Hose eBay
18-58710Hose Assembly 3/16" ID x 19”1Hose eBay
18-70005Hose 3/8”ID X 7” Push-On1Hose Amazon Amazon eBay eBay
18-72004Oil Drain Hose1Hose Amazon eBay
185046210Alternator Assembly1Alternator Amazon eBay FridayParts $79.00
185046220Alternator 12 Volt, 40 Amp1Alternator Amazon eBay FridayParts $107.03 SinoCMP $239.00
185086551Starter 12 Volt1Starter Amazon eBay $261.80
185246011Oil pressure unit1Sensor Amazon eBay $22.50 FridayParts $11.20
185366220Glow Plug, 12 Volt3Glow plug Amazon eBay $14.49 FridayParts $47.99
185366250Glow Plug, 12 Volt3Glow plug eBay $81.82 FridayParts $47.99
185376370Connector, Glow Plugs (former Harness part # 184606360)2Glow plug Amazon eBay
185416490Brush Assembly1Brush Amazon eBay
185416500Brush Holder Assembly1Brush Amazon eBay
185426231Brush2Brush Amazon eBay
185446234Regulator Assembly1Avr Amazon eBay
19-00012Hose Clamp #125Hose Amazon eBay
19-00016Hose Clamp #162Hose Amazon Amazon eBay eBay
19-00020Hose Clamp #201Hose Amazon eBay eBay
19-00040Hose Clamp #402Hose Amazon eBay
19-00048Hose Clamp #482Hose Amazon eBay
19-18602Hose Clamp2Hose Amazon eBay
195907460Gasket Kit (Industrial, includes keys 1-40)1Gasket eBay
198636090Oil Seal1Seal Amazon eBay FridayParts $45.14
21-13102Union 3/4" Hose Barb1Hose Amazon eBay
22-40236Oil Pressure Switch1Sensor eBay
22-40278Alternator (24V/40A Standard Ground)1Alternator eBay
22-40358Temperature Switch 95°C1Sensor eBay
22-40763Alternator 24 Volt, 35 Amp Isolated Ground1Alternator eBay
22-40846Temperature Switch 95°C M16 X 1.51Sensor eBay $90.00
22-41016Oil Pressure Sender1Sensor Amazon eBay $66.00
22-42014Switch, High Exhaust Temperature 205°F1Sensor Amazon eBay
22-42055Sender, Water Temperature - Single Station1Sensor Amazon eBay $35.00
22-42070Switch, High Exhaust Temperature & Harness Assembly1Sensor Amazon eBay
22-42121Starter, 24 Volt Standard Ground1Starter eBay
22-42122Starter, 24 Volt Isolated Ground1Starter eBay
22-42129Starter, 12 Volt Isolated Ground1Starter eBay
22-42803Oil Pressure Sender1Sensor Amazon eBay
22-44810Sender, Water Temperature - Single Station1Sensor eBay
22-48206Alternator 12 Volt, 40 Amp Isolated Ground1Alternator eBay
22-48603Alternator 24 Volt 25 Amp Standard Ground1Alternator eBay
22-48604Alternator 24 Volt 25 Amp Isolated Ground1Alternator eBay
22-71016Sender, Oil Pressure - Dual Station1Sensor Amazon eBay
22-71026Sender, Water Temperature - Dual Station1Sensor Amazon eBay
22-74802Sender, Water Temperature - Dual Station1Sensor eBay
22-74803Sender, Oil Pressure - Dual Station1Sensor eBay $14.95
24-02001Oil Filter1Oil filter Amazon eBay $23.45 NAPA $9.09
24-02002Oil Filter4Oil filter Amazon eBay $21.99 NAPA $23.67
24-28602Air Filter Element1Air filter Amazon eBay
24-52020Fuel Filter1Fuel filter Amazon eBay $24.71 NAPA $15.34
25-11216Impeller1Impeller Amazon eBay $199.95
25-12017Spline Seal1Seal Amazon eBay
25-12057Raw Water Pump1Pump Amazon eBay $582.42 FridayParts $381.16
25-12060Impeller1Impeller Amazon eBay $28.99
25-12065Lip Seal1Seal Amazon eBay $15.00
25-12066Mechanical Seal1Seal Amazon eBay $40.46
25-12067O-Ring1Seal Amazon eBay $6.95 NAPA $5.07
26-10002Feed Pump Assembly (includes keys #1 - 15)1Pump eBay
27-18601Tube 5/16" ID x 23" Polyurethane1Hose Amazon eBay
28-18601Thermostat Cover Plate1Thermostat Amazon eBay
29-08600Gasket Kit1Gasket Amazon eBay
29-08602Gasket Kit (Marine, includes all keys)1Gasket eBay
314990013Gasket (Industrial)1Gasket eBay
314990030Gasket, Elbow1Gasket Amazon eBay
340990011Gasket, Gear Case Cover1Gasket Amazon eBay
36-72002Hand Pump1Pump Amazon eBay
385720110Temperature Switch 95°C1Sensor Amazon eBay
40-08601Drive Belt1Belt Amazon eBay $122.00
40-08603Drive Belt1Belt Amazon eBay
40-08604Drive Belt (use with 22-48206 & 22-48604)1Belt eBay
41-00004Hose 3/4" ID x 18-1/2"13"Hose Amazon eBay
41-01011Hose 1/4" ID Push-on11Hose Amazon eBay FridayParts $859.86
49-00012Hose Clamp #124Hose Amazon eBay
7732-54108Belt guardBelt guard Amazon eBay
7732-54367Coolant recovery bottleCoolant recovery bottle Amazon eBay
7732-54637Generator control boxControl box Amazon eBay
7732-54692AC circuit breaker for AVRAc circuit breaker avr Amazon eBay
OM773LW3-01Air Filter1Air filter Amazon eBay
OM773LW3-02Oil Filter1Oil filter Amazon eBay
OM773LW3-03Fuel Filter1Fuel filter Amazon eBay
OM773LW3-04Belt1Belt Amazon eBay
OM773LW3-05Battery1Battery Amazon eBay
OM773LW3-06Spark Plug1Spark plug Amazon eBay
T403274O-ring1Seal eBay
T430626O-ring2Seal Amazon eBay
T432690O-ring2Seal eBay
T434080O-ring1Seal eBay
T435154Gasket1Gasket eBay
T435160Gasket1Gasket Amazon eBay
U10996900Gasket1Gasket Amazon eBay
U20406140Valve Guide Seal3Seal eBay FridayParts $31.49
U35997290Gasket1Gasket eBay
U45996831Gasket1Gasket eBay
00-00013Label "12 Volt"1Service part / kit Amazon eBay $121.99
00-00014Label "24 Volt"1Service part / kit Amazon eBay
00-08301"Northern Lights" Decal1Service part / kit Amazon eBay $575.49
00-13101Spring1Service part / kit Amazon eBay
00-40013Plate, S-1 Control Panel1Service part / kit Amazon eBay
00-40028Grommet1Service part / kit Amazon eBay
010109235Bolt20Service part / kit Amazon eBay
010109264Bolt1Service part / kit Amazon eBay
010109340Bolt6Service part / kit Amazon eBay
010110610Bolt2Service part / kit Amazon eBay
010110625Bolt2Service part / kit Amazon eBay
010110630Bolt1Service part / kit Amazon eBay
010310860Bolt1Service part / kit Amazon eBay
010311020Bolt8Service part / kit Amazon eBay
010311045Bolt2Service part / kit Amazon eBay
010700610Bolt1Service part / kit Amazon eBay
010700820Bolt4Service part / kit Amazon eBay
010700835Bolt2Service part / kit Amazon eBay
010700845Bolt2Service part / kit Amazon eBay
010810840Bolt4Service part / kit Amazon eBay
010810845Bolt2Service part / kit Amazon eBay
0109440Stud2Service part / kit Amazon eBay
011100408Bolt1Service part / kit Amazon eBay
011301025Bolt2Service part / kit Amazon eBay
011310612Bolt1Service part / kit Amazon eBay
011310614Bolt4Service part / kit Amazon eBay
011310620Bolt2Service part / kit Amazon eBay
011310625Bolt2Service part / kit Amazon eBay
011310635Bolt1Service part / kit Amazon eBay
011310640Bolt3Service part / kit Amazon eBay
011310660Bolt3Service part / kit Amazon eBay
011310680Bolt2Service part / kit Amazon eBay
011510640Bolt2Service part / kit Amazon eBay
011510840Bolt2Service part / kit Amazon eBay
011510850Bolt2Service part / kit Amazon eBay
011510865Bolt3Service part / kit Amazon eBay
012100620Stud1Service part / kit Amazon eBay
012100635Stud M6 x 1.0 x 35 mm1Service part / kit Amazon eBay
012100820Stud2Service part / kit Amazon eBay
012109177Stud3Service part / kit Amazon eBay
012110660Stud1Service part / kit Amazon eBay
015100412Screw1Service part / kit Amazon eBay
015140408Screw1Service part / kit Amazon eBay
015140425Screw2Service part / kit Amazon eBay
020109075CON ROD NUT6Service part / kit Amazon eBay
020109076Nut6Service part / kit Amazon eBay
020210010Nut1Service part / kit Amazon eBay
020700008Nut2Service part / kit Amazon eBay
020800018Nut1Service part / kit Amazon eBay
020900010Nut2Service part / kit Amazon eBay
023100004Nut3Service part / kit Amazon eBay
023100006Nut2Service part / kit Amazon eBay
023100008Nut3Service part / kit Amazon eBay
024600008Cap Nut3Service part / kit Amazon eBay
026100010Washer1Service part / kit Amazon eBay
026200008Washer1Service part / kit Amazon eBay
026200010Washer1Service part / kit Amazon eBay
027100008Spring Washer1Service part / kit Amazon eBay
027100010Spring washer1Service part / kit Amazon eBay
030300414Spring Pin1Service part / kit Amazon eBay
030300816Spring Pin1Service part / kit Amazon eBay
030309005Spring Pin2Service part / kit Amazon eBay
030500512Dowel Pin2Service part / kit Amazon eBay
030500612Dowel Pin6Service part / kit Amazon eBay
030500616Dowel Pin2Service part / kit Amazon eBay
030501025Dowel Pin2Service part / kit Amazon eBay
030509020Dowel Pin1Service part / kit Amazon eBay
031100004Snap Pin1Service part / kit Amazon eBay
034100508Key1Service part / kit Amazon eBay
036500021Snap Ring6Service part / kit Amazon eBay
036509005Snap Ring1Service part / kit Amazon eBay
036800005Snap Ring1Service part / kit Amazon eBay
036800006Snap Ring1Service part / kit Amazon eBay
036800008Snap Ring2Service part / kit Amazon eBay
036800010Snap Ring1Service part / kit Amazon eBay
040106203Bearing1Service part / kit Amazon eBay

Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.

Fuel consumption

RatingLoadL/hgal/h
50%1.80.48
100%3.520.93
Prime1.41.4
Prime50%1.930.51
Prime100%3.520.93
Standby0.930.93
Standby100%3.520.93

Available documents

Spec sheet — B184-M773LW3G-1 (Northern Lights)Spec sheet — B184-M773LW3G (Northern Lights)Spec sheet — M773LK (Northern Lights)Spec sheet — M773LW (Northern Lights)Spec sheet — S103 M773LW3 spec sheets V1 (Northern Lights)Spec sheet — S202-M773LW3GN (Northern Lights)Operator's manual — OM773LW3 (Northern Lights)Owner's manual — OM773LKsp (Northern Lights)Parts manual — D-5035A (Northern Lights)Parts manual — D-5035B (Northern Lights)Parts manual — D-5670 (Northern Lights)Parts manual — L510-Spares-Kit-Updated-April-2020 (Northern Lights)Parts manual — L631-Marine-Accessories (Northern Lights)Parts manual — P773LK-I (Northern Lights)Parts manual — P773LK (Northern Lights)Parts manual — P773N-3 (Northern Lights)Parts manual — filter chart guide (Northern Lights)Parts manual — p773-3-i (Northern Lights)

This page was generated from the 18 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.

Full service, cheapest listings

Priced items from this model's own parts manual.

Fuel filter 24-52020$15.34
Oil filter 24-02001$9.09
Belt 40-08601$122.00
3 priced items$146.43