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Northern Lights 753c Engine

The Northern Lights 753c is an engine. It powers generator sets from Northern Lights, including the M753 and NL753.

Also known as: Northern Lights 753c

Part of the Northern Lights 753 engine family — 4 variants share parts & fitment.

On this pageSpecs Generator sets Maintenance FAQ Service intervals Torque & specs Fluids Procedures

Engine specifications

Generator sets powered by this engine

Northern Lights M753 Northern Lights NL753

How to read your Northern Lights engine serial & model number →

Common problems

ENGINE HARD TO START OR WILL NOT START
Cause: Improper starting procedure (pages 10 and 11). No fuel. Low battery output. Check electrolyte level and specific gravity of battery (pages 14 and 28). Excessive resistance in starting circuit. Clean and tighten all connections on batteries (pages 13, 14 and 28). Crankcase oil too heavy. Use oil of proper viscosity (pages 13). Improper type of fuel. Consult fuel supplier and use proper type of fuel for operating condition. Water, dirt or air in fuel system. Drain, flush, fill and bleed system (pages 21 and 22). Clogged primary fuel filter element. Clean or replace filter element (pages 20 and 21). Clogged secondary fuel filter element. Replace filter element (page 21). Dirty or faulty injection nozzles. Have your dealer check injection nozzles (pages 22 - 24). Fuel pump primer lever left on upward end of stroke.
LACK OF ENGINE POWER
Cause: Engine overloaded. Reduce load. Intake air restricted. Clean or replace air filter element (pages 25 and 26). Clogged primary fuel filter elemert. Clean or replace filter element (pages 20 and 21). Clogged secondary fuel filter element. Replace secondary filter element (page 21). Water, dirt, or air in fuel system. Drain, flush and bleed system (pages 21 and 22). Dirty or faulty injection nozzles. Have your dealer check injection nozzles (pages 22 - 24).
ENGINE RUNS IRREGULARLY OR STALLS FREQUENTLY
Cause: Below normal engine temperature. Remove and check thermostat. See parts manual for location of thermostats. Defective temperature gauge. Check water temperature with thermometer and replace gauge if necessary. Clogged primary fuel filter elemert. Clean or replace filter element (pages 20 and 21). Clogged secondary fuel filter element. Replace secondary filter element (page 21). Water, dirt, or air in fuel system. Drain, flush and bleed system (pages 21 and 22). Dirty or faulty injection nozzles. Have your dealer check injection nozzles (pages 22 - 24). Inspect clamps and hoses. Replace if necessary. Use only approved parts. Improper type of fuel. Consult fuel supplier and use proper type of fuel for operating condition (page 13).
High fuel consumption
Fix: Improper type of fuel (page 13). Clogged or dirty air cleaner. Engine overloaded. Grass, etc. on bottom of boat (page 12). Improper valve clearance. See your dealer (page 19).
Engine overheats
Fix: See “Engine Overheating” section above
Starter cranks slowly
Fix: Low battery output. Batteries too small. Battery cable too small. Check specific gravity of each battery (page 28). Check electrolyte level of each battery (page 28). Crank case oil too heavy (page 13). Loose or corroded connections. Clean and tighten loose connections.
Engine emits black or gray exhaust smoke
Fix: Clogged or dirty air cleaner. Defective muffler (back pressure too high.). Improper fuel (page 13). Engine overloaded. Reduce load. Check propeller size (page 31). Injection nozzles dirty. See your dealer (pages 22 - 24). Engine out of time. See your dealer.
High oil consumption
Fix: Break-in period (pages 12 and 13). Crankcase oil too light. Use proper viscosity oil (pages 13). Oil leaks. Check for leaks in lines around gaskets and drain plug.
Battery will not charge
Fix: Loose or corroded connections. Clean and tighten battery connection (pages 13, 14 and 28). Sulfated or worn-out batteries. Check specific gravity of each battery (page 28). Check electrolyte level of each battery (page 28). Defective electrical system ground wire. Repair or replace.
Engine emits white smoke
Fix: Improper fuel (page 13). Cold engine. Warm up engine to normal operating temperature (pages 11 and 12). Defective thermostat. Remove and check thermostat. See parts manual for location of thermostats. Engine out of time. See your dealer.
Below normal engine temperature
Fix: Remove and check thermostat. See parts manual for location of thermostats.
Thermostats not working properly
Fix: Check thermostats. See parts manual for location of thermostats.
Temperature gauge not working properly
Fix: Check water temperature by sticking a gauge into water.
Partially plugged oil filter
Fix: Replace filter (pages 20 and 21)
Overheated engine
Fix: See “Engine Overheats”

Compiled from service & troubleshooting documentation across every generator set that uses the Northern Lights 753c.

Maintenance schedule

Item	Part #	Interval
Air filter	24-22001	250 hr	Amazon eBay
Fuel filter	24-52020	14 hr	Amazon eBay $24.71 NAPA $15.34
Oil filter	140546020	100 hr	Amazon eBay
Belt	40-08201	13 hr	Amazon eBay

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.

Service intervals

Item	Action	Hours	Months	Notes
Battery electrolyte	Check	50 hr	1 mo	First service — Every 50 hours or once per month
Cylinder head bolts	Adjust	50 hr		First service — Retighten when cold
V-belt tension	Check	50 hr		First service — Every 50 hours
V-belts	Check	50 hr
Valve clearance	Adjust	50 hr		First service — After first 50 hours (SP6)
Valve clearances	Adjust	50 hr		First service — SP6 - After first 50 hours
Valves	Adjust	50 hr		First service — After first 50 hours
battery electrolyte level	Check	50 hr	1 mo	Battery care text: every 50 hours or once per month
Air cleaner	Inspect	100 hr		Replace as necessary
Battery cables and terminals	Clean	100 hr		Every 100 hours
Engine oil	Change	250 hr		First service — Service chart; after first 50 hours during break-in
Radiator fins	Clean	250 hr		Industrial; in dusty applications
Injection pump lubricating oil	Change	200 hr		Except LM 753
Lubricating oil filters	Change	200 hr		First service — Service chart; text also states every 100 hours; change after first 50 hours during break-in
Primary fuel filter element	Change	200 hr		Racor; every 200 hours
Zinc electrodes	Check	200 hr
Air cleaner	Check	250 hr		SP4 - Inspect every 250 hours; more often in dusty conditions
Batteries	Test	250 hr		SP19 - Check condition of batteries with hydrometer
Engine oil and filter	Change	250 hr		First service — SP2/3 - Every 250 hours; every 100 hours or six weeks in intermittent cold weather operation
Lube oil filter	Change	250 hr		First service — Every 250 hours (SP3)
Radiator fins (industrial)	Clean	250 hr		SP16 - Check and clean radiator; every 100 hours in very dusty applications
battery condition	Test	250 hr		Hydrometer check every 250 hours (SP19)
Exhaust elbow	Inspect	500 hr		SP21
Primary fuel filter element (Racor)	Change	500 hr		SP8 - Change element every 500 hours or as often as necessary
Secondary fuel filter	Change	600 hr		SP9 - Every 500 hours
Battery state of charge	Test	600 hr		Hydrometer check every 600 hours
Cooling system	Clean	2500 hr	12 mo	Flush every 600 hours or 12 months
Seawater pump impeller	Change	600 hr		Marine
Valve clearance	Check	600 hr
Air cleaner element	Replace	1000 hr		SP4 - Change element at 1000 hours
Injectors	Check	1000 hr		SP11 - Check by Northern Lights dealer or injection repair station
Raw water pump impeller	Change	1000 hr		SP17; or as needed
Raw water pump impeller (marine)	Replace	1000 hr		SP17 - Or as needed
Valve clearances	Check	1000 hr		SP6 - Every 1000 hours thereafter
air cleaner element	Change	1000 hr		Every 1000 hours (SP4)
Reverse gear oil	Change	1200 hr	12 mo	Whichever comes first
injection nozzles	Clean	1500 hr		Note 6; clean every 1500 hours
Fuel injection pump	Check	2500 hr		Settings, idle, maximum speed and exhaust smoke every 2400 hours
Heat exchanger	Clean	2500 hr	12 mo	Marine only; once a year or after 2400 hours
Reverse gear oil cooler	Clean	2400 hr	12 mo

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

Type	Item	Value	Unit	Condition
Clearance	Coolant level	1 3/4	in	cold, below filler cap sealing surface; 4-5 cm as printed
Clearance	Cooling water level below filler cap sealing surface	about 1 (2.5 cm)	in.	engine cold
Clearance	V-belt deflection at midpoint	about 3/16	in. (5 mm)	between crankshaft and alternator pulleys
Gap	V-belt deflection	3/16	in	midpoint between crankshaft and alternator pulleys
Gap	V-belt deflection	3/4	in	midway; 17 mm as printed
Gap	V-belt deflection	5	mm	midpoint between crankshaft and alternator pulleys
Other	Battery hydrometer correction	0.004		per 10°F above or below 80°F (27°C)
Other	Battery specific gravity	1.260		fully charged, corrected
Other	Battery specific gravity charge threshold	1.215		charge if below
Other	Battery specific gravity cold	1.280		full charge reading
Other	Battery specific gravity tropical	1.225		full charge reading
Other	Bore	75	mm
Other	Compression ratio	23:1
Other	Coolant level	about 1	in. (2.5 cm) below filler cap sealing surface	engine cold
Other	Displacement	0.95	l
Other	Maximum intermittent operating angle, industrial	0	°
Other	Maximum intermittent operating angle, marine	15	°
Other	Stroke	72	mm
Other	V-belt deflection at midpoint between crankshaft and alternator pulleys	3/16 (5 mm)	in.	thumb pressure
Pressure	Coolant filler cap	7	PSI	release pressure
Pressure	Coolant filler cap release	7	PSI	approximately
Pressure	Cooling system filler cap pressure valve release	7 (0.5 bar)	PSI
Pressure	Engine oil pressure	above 15	PSI	operating
Pressure	Engine oil pressure (running, Series 3/4 panels)	above 15	PSI	engine operating
Pressure	Engine oil pressure normal reading	20-60	PSI	after a few seconds of operation
Pressure	Engine oil pressure, minimum	15	PSI	operating
Pressure	Engine oil pressure, normal after start	20-60	PSI	after a few seconds of operation
Pressure	Filler cap pressure valve	approximately 7	PSI (0.5 bar)
Pressure	Maximum exhaust back pressure	48	in H2O
Pressure	Maximum fuel pump head suction	39	in	1.0 m
Pressure	Normal oil pressure reading after start	20-60	PSI	a few seconds of operation
Pressure	Oil pressure	20-60	PSI	after a few seconds of operation
Pressure	Oil pressure	above 15	PSI	operating
Pressure	Oil pressure	above 30	PSI	after start
Pressure	Oil pressure minimum operating	above 15	PSI	operating
Pressure	Oil pressure normal	20 - 60	PSI	after a few seconds of operation
Pressure	Oil pressure shutdown threshold	below 15	PSI	speed higher than idling
Pressure	Radiator cap pressure	4	psi	pressure valve releases; 27 kPa as printed
Pressure	Radiator filler cap pressure valve release	approximately 7	PSI (0.5 bar)
Speed	Frequency 50 Hz	1500	rpm
Speed	Frequency 60 Hz	1800	rpm
Speed	Frequency meter engine speed	1200 or 1800 RPM (60 Hz), or 1500 RPM (50 Hz)
Speed	Frequency meter indication	1200 or 1800 RPM (60 Hz), or 1500 RPM (50 Hz)	RPM
Speed	Generator frequency	60	Hz	1800 RPM or 1200 RPM
Speed	Low idle	650	RPM
Speed	Maximum engine speed when shifting	800	RPM	should not be exceeded
Speed	Normal engine working range	1800-2700	RPM	depending on engine
Temperature	Coolant temperature, normal	167 - 194	°F (75°C to 90°C)
Temperature	Coolant temperature, restart threshold	below 200	°F (94°C)	restart after overheat
Temperature	Coolant temperature, shutdown threshold	205	°F (96°C)	above; shut off immediately on marine units
Temperature	Cooling water temperature	below 140	°F	investigate
Temperature	Cooling water temperature	over 200	°F	stop engine and investigate
Temperature	Cooling water temperature, industrial sets	below 225 (107)	deg F	normal operation; shut off immediately above 230 deg F (110 deg C)
Temperature	Cooling water temperature, marine sets	below 200 (94)	deg F	normal operation; shut off immediately above 205 deg F (96 deg C)
Temperature	Industrial water temperature normal	below 225	°F
Temperature	Industrial water temperature shutdown	above 230	°F
Temperature	Marine water temperature normal	below 200	°F
Temperature	Marine water temperature shutdown	above 205	°F
Temperature	Water temperature	below 225	°F (107°C)	operating
Temperature	Water temperature gauge	below 200	°F	operating

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

Fluid	Grade	Standard	Ambient	Capacity	Notes
Coolant	50% water / 50% ethylene glycol antifreeze			3.7 l	Marine sets
Coolant	50% water / 50% ethylene glycol antifreeze mix				Do not use methyl alcohol based antifreeze or high silicate antifreeze
Coolant	50% water/50% ethylene glycol antifreeze				Recommended as a good year-round coolant
Coolant	Ethylene glycol with inhibitors		above -25°C		Minimum 40% and maximum 60% glycol mixture provides protection down to about -13°F (-25°C)
Engine oil	RPM Delo series 100/30W or service CC 30/W				Break-in oil for first 100 hours; change at 50 and 100 hours
Engine oil	SAE 5W	API Service CC/CD/CE or CC/CD/SF	below -23°C		Below -10°F (-23°C); SAE 5-20W multi-viscosity alternative
Engine oil	SAE 5W (single viscosity) / SAE 5-20W (multi-viscosity)	API Service CC/CD/CE single viscosity or CC/CD/SF multi-viscosity	below -23°C		Below -10 deg F (-23 deg C); oil consumption may increase with SAE 5W and SAE 5-20W oils
Engine oil	SAE 5W (single viscosity) or SAE 5-20W (multi-viscosity)	API Service CC/CD/CE single; CC/CD/SF multi	below -23°C		Below -10°F (-23°C)
Engine oil	SAE 5W / SAE 5-20W	API Service CC/CD/CE single viscosity oils; API Service CC/CD/SF multi-viscosity oils	below -23°C		Below -10°F (-23°C)
Engine oil	SAE 5W single viscosity or SAE 5-20W multi-viscosity	API Service CC/CD/CE single viscosity; API Service CC/CD/SF multi-viscosity	below -23°C		Below -10°F (-23°C)
Engine oil	SAE 5W-20	API Service CC/SD or MIL-L-46152	below -23°C		Below -10°F (-23°C); some increase in oil consumption may be expected
Engine oil	Service CC 30 weight				Use during the first 100 hours; set is delivered with special break-in oil. Never use flushing oil or additives
Engine oil	SAE 10W	API Service CC/CD/CE or CC/CD/SF	-23°C to 0°C		-10 to 32°F (-23 to 0°C); SAE 10-30W multi-viscosity alternative
Engine oil	SAE 10W (single viscosity) / SAE 10-30W (multi-viscosity)	API Service CC/CD/CE single viscosity or CC/CD/SF multi-viscosity	-23°C to 0°C		Chart printed as -10 to 32 deg F (-23 to 0 deg C)
Engine oil	SAE 10W (single viscosity) or SAE 10-30W (multi-viscosity)	API Service CC/CD/CE single; CC/CD/SF multi	-23°C to 0°C		-10 to 32°F (-23 to 0°C)
Engine oil	SAE 10W / SAE 10-30W	API Service CC/CD/CE single viscosity oils; API Service CC/CD/SF multi-viscosity oils	-23°C to 0°C		-10 to 32°F (-23 to 0°C)
Engine oil	SAE 10W single viscosity or SAE 10-30W multi-viscosity	API Service CC/CD/CE single viscosity; API Service CC/CD/SF multi-viscosity	-23°C to 0°C		-10 to 32°F (-23 to 0°C)
Engine oil	SAE 10W-30	API Service CC/SD or MIL-L-46152	-23°C to 0°C		Multi-viscosity for 10°F-32°F (-23°C-0°C)
Engine oil	SAE 30W	API Service CC/CD/CE or CC/CD/SF	above 0°C		Above 32°F (0°C); SAE 15-40W multi-viscosity alternative
Engine oil	SAE 30W (single viscosity)	API Service CC/CD	above 0°C		Above 32°F (0°C); multi-viscosity: Don't Use
Engine oil	SAE 30W (single viscosity) / SAE 15-40W (multi-viscosity)	API Service CC/CD/CE single viscosity or CC/CD/SF multi-viscosity	above 0°C	3.5 L	Above 32 deg F (0 deg C). Capacity with new oil filter, 753K: 3.7 quarts (3.5 liters)
Engine oil	SAE 30W (single viscosity) or SAE 15-40W (multi-viscosity)	API Service CC/CD/CE single; CC/CD/SF multi	above 0°C		Above 32°F (0°C)
Engine oil	SAE 30W single viscosity / SAE 15-40W multi-viscosity	API Service CC/CD/CE single viscosity oils; API Service CC/CD/SF multi-viscosity oils	above 0°C	3.5 liters	Above 32°F (0°C). Use Service CC 30 weight during first 100 hours. Capacity with new filter 3.7 quarts.
Engine oil	SAE 30W single viscosity or SAE 15-40W multi-viscosity	API Service CC/CD/CE single viscosity; API Service CC/CD/SF multi-viscosity	above 0°C		Above 32°F (0°C)
Fuel	Grade No. 1 diesel	ASTM D975; cetane minimum 45; sulphur less than 1% preferably less than 0.5%	below 0°C		Below freezing and for all temperatures above 5,500 ft. (1500 meters)
Fuel	Grade No. 1-D	ASTM D975	below 0°C		Use at ambient temperatures below freezing and for all temperatures at altitudes above 5,000 ft (1,500 m); cetane 45 minimum; sulfur less than 1.0%, preferably less than 0.5%
Fuel	Grade no. 1 diesel	ASTM D975	below 0°C		Below freezing and for all temperatures at altitudes above 5,500 ft (1500 m); do not use heating oils or Class B, D, E, F, G, H fuels or ASTM-D975-60T No. 4-D and higher
Fuel	No. 1 diesel	ASTM D975	below 0°C		Below freezing and all temperatures above 5,500 ft (1500 m)
Fuel	Grade No. 2 diesel	ASTM D975; cetane minimum 45; sulphur less than 1% preferably less than 0.5%	above 0°C		At ambient temperatures above freezing 32°F (0°C)
Fuel	Grade No. 2-D	ASTM D975	above 0°C		Use at ambient temperatures above freezing

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

Procedures

Adjust Valve Clearances adjustment

Tools: feeler gauge, wrench

Adjust after head bolts are retightened; engine cold and not running.
Turn engine by hand until valves rock, then one more full turn.
Loosen lock nut and adjust clearance with adjustment screw.
Set intake and exhaust clearance to 0.008 in (0.2 mm).
Repeat for each cylinder; replace rocker arm cover.
Tighten cover nuts to 5-8 ft/lb (0.8-2.3 kg/m).

Adjust valve clearance adjustment

Tools: feeler gauge, wrench

Adjust after head bolts are retightened; engine cold and stopped.
Turn engine by hand until valves rock.
Turn crankshaft one more full turn.
Loosen locknut and adjust clearance.
Set both intake and exhaust to 0.008 in (0.2 mm).
Repeat for each cylinder individually.
Replace rocker arm cover; tighten nuts 5-8 ft/lbs.

Adjusting valve clearance adjustment

Do adjustment after cylinder head bolts are tightened and engine is stopped.
Turn engine by hand until inlet valve starts to open and exhaust valve starts to close.
Turn crankshaft one more turn and adjust clearance for this cylinder.
Loosen nut and adjust intake and exhaust valves with adjust screw.
Adjust each set of valves individually.
Replace rocker arm cover and tighten nuts evenly.

Retightening Cylinder Head Bolts adjustment

⚠ Tighten bolts when the engine is cold.

Tools: Torque wrench

Retighten head bolts after the first 50 hours with the engine cold.
Loosen the nuts and remove the rocker arm cover.
Tighten head bolts with a torque wrench in the order shown, evenly in 2 or 3 passes.
Finish at 33 - 36 ft/lbs (4.5 - 5 kg/m) on the final pass.
Replace the rocker arm cover and tighten cover nuts to 5 - 8 ft/lbs (0.8 - 2.3 kg/m).

V-Belt Tension adjustment

Check tension and wear on V-belt daily.
Press belt at midpoint between crankshaft and alternator pulleys with thumb.
Tension is correct if belt can be depressed about 3/16 in. (5 mm).

Valve Clearance Adjustment adjustment

Tools: adjustment screw, lock nut

Adjust valve clearance after 1000 hours or as needed.
Do adjustment after cylinder head bolts re-tightened; engine cold and NOT running.
Turn engine by hand until inlet valve starts to open and exhaust starts to close.
Turn crankshaft one more full turn; adjust both valves for this cylinder.
Loosen lock nut and adjust clearance between rocker arm and valve guide.
Clearance on both intake and exhaust valves should be 0.008 in. (0.2 mm).
Repeat for each cylinder; adjust each set of valves individually.
Replace rocker arm cover; tighten cover nuts to 5 - 8 ft/lbs (0.8 - 2.3 kg/m).

Valve Clearance Adjustment (SP6) adjustment

Tools: Feeler gauge, Wrench

Adjust valve clearance after the first 50 hours and every 1000 hours thereafter, after head bolts are retightened.
Engine must be cold and NOT running.
Turn engine by hand until the inlet valve starts to open and exhaust valve starts to close (rocking).
Turn the crankshaft one more full turn and adjust both valves for this cylinder.
Loosen the lock nut and adjust clearance between rocker arm and valve guide with the adjustment screw.
Set both intake and exhaust to 0.008 in. (0.2 mm); repeat for each cylinder.
Replace the rocker arm cover and tighten cover nuts to 5 - 8 ft/lbs (0.8 - 2.3 kg/m).

Valve Clearances adjustment

Tools: Adjustment screw, Lock nut wrench

Adjust valve clearance after first 50 hours and every 1000 hours thereafter.
Perform after cylinder head bolts have been re-tightened; engine cold and not running.
Bring No. 1 cylinder to top dead center on compression stroke by aligning crank pulley top mark with timing gear case mark.
Remove rocker arm cover; if No. 1 inlet and exhaust valves do not move, it is at TDC; if they move, turn crankshaft one full turn and realign marks.
Loosen lock nut and adjust clearance between rocker arm and valve guide for intake and exhaust valves.
Set both intake and exhaust valve clearance to 0.008 in. (0.2 mm).
Repeat for each cylinder; adjust each set of valves individually.
Replace rocker arm cover; tighten cover nuts to 5 - 8 ft/lbs (0.8 - 2.3 kg/m).

Glow Plug Test diagnostic

Tools: DC test bulb

Loosen current carrying flat wire between plus-poles of glow plugs.
Connect a DC test bulb between plus-pole of battery and plus-pole of glow plug.
If bulb lights up, glow plug is functioning properly.
Check all glow plugs and replace any faulty ones.

Glowplug check diagnostic

⚠ Do not hold pre-heat switch on over 30 seconds; glowplugs may burn out.

Tools: Test bulb

Loosen current-carrying flat wire between plug poles of glowplugs.
Connect a bulb between plus-pole of battery and plus-pole of glowplug.
If bulb lights up, glowplug is functioning.
Check all glowplugs and replace faulty ones.

Air Cleaner maintenance

⚠ Do not run engine with air cleaner removed.

Inspect air cleaner every 250 hours; check more often in dusty conditions.
If dirty, wash element in soapy water, rinse and dry thoroughly.
Replace if necessary.
Ensure no impurities enter engine while changing element.

Air Cleaner Service (SP4) maintenance

⚠ Do NOT run the engine with the air cleaner removed.

Inspect air cleaner every 250 hours; check more often in dusty conditions.
Marine sets: if dirty, wash element in soapy water, rinse and dry thoroughly before reinstalling; replace if necessary.
Industrial sets: element cannot be cleaned; replace it when necessary.
Make sure no impurities enter the engine while changing the element.

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

Parts cataloged across the Northern Lights 753 family

300

Part #	Description	Category
24-20001	Air Filter	Air filter
24-22001	Air Filter Element (Paper Type - Alternate)	Air filter
24-22003	Air filter	Air filter
24-22005	Air Filter Assembly (includes Keys #1 - #2)	Air filter
24-28200	Air Filter Assembly (includes keys #1-18)	Air filter
24-28602	Air Filter Element	Air filter
314500361	Air Cleaner Assembly (includes Keys #14 - #19) (formerly #314500360)	Air filter
314531123	Air Cleaner Element (Industrial)	Air filter
314531124	Element Assembly	Air filter
314531127	Element (marked #314531065)	Air filter
185046180	12V Alternator with Separate Regulator	Alternator
185046210	Alternator Assembly	Alternator
185046220	Alternator 12 Volt, 40 Amp	Alternator
185446234	Regulator Assembly	Avr
185516030	Voltage Regulator	Avr
185516060	12V DC Regulator	Avr
185516070	Voltage Regulator (Alternate)	Avr
O753K	Battery connections.	Battery
40-08201	V-Belt (formerly #'s 080109050 & 080109049)	Belt
40-08601	Drive Belt	Belt
40-41900	Drive Belt	Belt
185416490	Brush Assembly	Brush
185416500	Brush Holder Assembly	Brush
185446149	Brush Assembly	Brush
185446231	Brush	Brush
185846119	Brush	Brush
130306190	Fuel Filter Assembly	Fuel filter
130336020	Secondary fuel filter	Fuel filter
24-52020	Fuel Filter	Fuel filter
24-52259	Fuel filter	Fuel filter
FF5114	Fuel	Fuel filter
052109061	Rocker Cover Gasket	Gasket
054109013	Gasket	Gasket
11-08601	Gasket, Exhaust	Gasket
11-18602	Gasket, Thermostat Cover	Gasket
11-31902	Gasket	Gasket
110996491	Oil Pan Gasket	Gasket
110996800	Gasket	Gasket
111146882	Head Gasket t = 1.1 mm	Gasket
111146892	Head Gasket t = 1.2 mm	Gasket
111146901	Head Gasket t = 1.3 mm	Gasket
111147630	Head Gasket, t=1.2 mm	Gasket
111147640	Head Gasket, t=1.3 mm	Gasket
111996271	Gasket - Industrial	Gasket
111996290	Gasket (Marine)	Gasket
111996420	Gasket, Rocker Arm Cover	Gasket
120996150	Gasket, Rocker Arm Bracket	Gasket
130326051	Gasket	Gasket
130516069	Gasket	Gasket
130516101	Gasket	Gasket
130996070	Gasket	Gasket
130996130	Gasket	Gasket
131426010	Gasket	Gasket
131426200	Gasket	Gasket
131426210	Gasket	Gasket
131437150	Injection Pump Gasket, t = 0.2 mm	Gasket
131437160	Injection Pump Gasket, t = 0.3 mm	Gasket
135996390	Gasket, Asbestos (replaced by #135996540)	Gasket
135996400	Gasket (can use #135996540)	Gasket
135996540	Gasket, Asbestos (replaced by #135996541)	Gasket
135996541	Gasket	Gasket
135996750	Gasket, Air Intake	Gasket
140546020	Filter Joint	Gasket
140996260	Gasket	Gasket
140996270	Gasket, Valve Assembly	Gasket
145996270	Gasket	Gasket
145996280	Gasket	Gasket
145996590	Gasket (formerly #145996400)	Gasket
145996830	Gasket	Gasket
165206150	Gasket (can use #165996110)	Gasket
165996050	Water Pump Cover Gasket	Gasket
165996300	Front Plate Gasket, Cylinder Block	Gasket
165996310	Gasket	Gasket
165996520	Gasket, Front Plate	Gasket
165996530	Gasket	Gasket
195906430	Gasket Set (includes all items below)	Gasket
198996050	Prechamber Gasket	Gasket
198996060	Gasket	Gasket
29-08201	Gasket Set (Marine - includes all keys)	Gasket
314990013	Gasket (Industrial)	Gasket
314990030	Gasket, Elbow	Gasket
340990011	Gasket, Gear Case Cover	Gasket
185366060	Glow Plug, 12 Volt	Glow plug
185366100	Glow Plug, 24 Volt	Glow plug
185366220	Glow Plug, 12 Volt	Glow plug
22-40077	Glow Plug Relay	Glow plug
068115200	Tube	Hose
130556921	Pipe (Marine)	Hose
140606710	Drain Hose (Marine application only)	Hose
140607400	Oil Pipe	Hose
140986830	Oil Hose (Marine)	Hose
145536300	Hose, Radiator Inlet	Hose
145536310	Hose, Radiator Outlet	Hose
145536340	Hose	Hose
145536400	Hose	Hose
18-18601	Coolant Pump Inlet Hose	Hose
18-18602	Hose 5/16" ID x 28" Polyvinyl	Hose
18-18603	Hose, Coolant By-pass	Hose
18-18604	Hose, Coolant Pump Inlet	Hose
18-18605	Hose, Expansion Tank Outlet	Hose
18-18606	Hose, 1/2” I.D. x 3-1/2” 3 Ply Silicone	Hose
18-28201	Hose 1-5/8" ID x 1-3/4" 3 Ply Silicone	Hose
18-28601	Hose, Air Intake	Hose
18-72004	Oil Drain Hose	Hose
198756200	Hose Clamp	Hose
27-18601	Tube 5/16" ID x 23" Polyurethane	Hose
41-01011	Hose 1/4" ID Push-on	Hose
145116100	Impeller	Impeller
145626040	Impeller	Impeller
25-11216	Impeller	Impeller
25-12060	Impeller	Impeller
131406310	Fuel Injector (includes all Keys)	Injector
131406330	Injector Assembly	Injector
131406340	Injector Assembly	Injector
131416120	Nozzle	Injector
131416140	Nozzle Assembly	Injector
131416150	Nozzle	Injector
140516130	Lube oil filter	Oil filter
140516190	Lube oil filter	Oil filter
24-02001	Oil Filter	Oil filter
24-02002	Oil Filter	Oil filter
LF3495	Lube	Oil filter
010401212	Plug, Hex Head M12x1.25	Service part / kit
015140408	Screw	Service part / kit
015140425	Screw	Service part / kit
030300816	Spring Pin	Service part / kit
030309005	Spring Pin	Service part / kit
030500410	Pin	Service part / kit
030500612	Dowel Pin	Service part / kit
030500616	Dowel Pin	Service part / kit
030501025	Dowel Pin	Service part / kit
030509020	Dowel Pin	Service part / kit
034100508	Key	Service part / kit
036509005	Snap Ring	Service part / kit
040106203	Bearing	Service part / kit
040126210	Bearing	Service part / kit
040306203	Bearing	Service part / kit
042303015	Bearing	Service part / kit
064100045	Expansion Plug	Service part / kit
064115200	Tube	Service part / kit
064200015	Expansion Plug 15 mm	Service part / kit
064200025	Shallow Cup Core Plug 25 mm	Service part / kit
064200035	Expansion Plug 35 mm	Service part / kit
064200040	Shallow Cup Core Plug 40 mm	Service part / kit
110106791	Cylinder Block Assembly (Blue - Industrial)	Service part / kit
110106960	Cylinder Block Assembly (White - Marine)	Service part / kit
110107451	Cylinder Block Assembly (Blue - Industrial)	Service part / kit
110107461	Cylinder Block Assembly (White - Marine)	Service part / kit
110156111	Bearing Holder Assembly	Service part / kit
110156121	Bearing Holder Assembly	Service part / kit
110156131	Bearing Holder Assembly	Service part / kit
110156330	Bearing Holder with Integral Thrust Washers	Service part / kit
110446363	Flywheel Housing (Blue - Industrial)	Service part / kit
110446421	Flywheel Housing	Service part / kit
110566080	Breather Valve	Service part / kit
110666060	Vent Filter	Service part / kit
110666090	Filter	Service part / kit
110707480	Oil Pan-Stamped (White - Marine)	Service part / kit
110707820	Oil Pan-Stamped (Blue - Industrial)	Service part / kit
110756070	Dipstick Tube	Service part / kit
110766200	Holder	Service part / kit
115017590	Piston Kit, Standard (includes key #16)	Service part / kit
115107980	Piston Ring Kit, Standard	Service part / kit
115256461	Crankshaft, Early	Service part / kit
115256600	Crankshaft, Late	Service part / kit
115276180	Crankshaft Gear	Service part / kit
115326231	Piston Pin	Service part / kit
120116100	Tappet	Service part / kit
120456201	Push Rod Set	Service part / kit
130516084	Diaphragm	Service part / kit
130556681	Pipe	Service part / kit
130556931	Pipe	Service part / kit
131426300	Shim Set	Service part / kit
131437640	Shim Kit	Service part / kit
135406170	Muffler	Service part / kit
135806060	Elbow 90° Steel	Service part / kit
140036120	Relief Valve Assembly	Service part / kit
140036220	Relief Valve Assembly	Service part / kit
145536390	Zinc	Service part / kit
145546060	Radiator Cap	Service part / kit
165296141	Idler Gear Shaft Assembly	Service part / kit
185206082	Stop Solenoid, 12 Volt - Standard Ground	Service part / kit
185206083	Fuel Solenoid	Service part / kit
185206084	Solenoid, 12 Volt Standard Ground	Service part / kit
185206190	Stop Solenoid, 12 Volt - Isolated Ground	Service part / kit
185206191	Stop Solenoid, 12 volt	Service part / kit
185206200	24 Volt Solenoid	Service part / kit
185446217	Plate, complete	Service part / kit
185446218	Stator, complete	Service part / kit
185446219	Flywheel, complete	Service part / kit
185446220	Clamp	Service part / kit
185446223	Retainer Plate	Service part / kit
185446224	Ball Bearing	Service part / kit
185446232	Spring	Service part / kit
185446241	Ball Bearing	Service part / kit
185446244	Collar	Service part / kit
185716200	Plate	Service part / kit
185866411	Pinion Assembly	Service part / kit
195816100	Lifting Eye (Industrial)	Service part / kit
198436010	Cap (Marine)	Service part / kit
198436130	Plug (Cast Pan Only)	Service part / kit
198466010	Blank Plug	Service part / kit
198466030	Plug	Service part / kit
198466050	Blank Plug	Service part / kit
198466060	Plug	Service part / kit
198486770	Bushing	Service part / kit
198517080	Standard Bushing	Service part / kit
198517081	Bushing, Standard	Service part / kit
198517084	Bushing, Undersize 0.25 mm	Service part / kit
198517085	Bushing, Undersize 0.25 mm	Service part / kit
198517087	Bushing, Undersize 0.50 mm	Service part / kit
198517088	Bushing, Undersize 0.50 mm	Service part / kit
198517101	Bearing, Standard	Service part / kit
198517103	Bearing, Standard Upper	Service part / kit
198517105	Bearing, Undersize 0.25 mm	Service part / kit
198517107	Bearing, undersize 0.25 mm (formerly #198517106)	Service part / kit
198517108	Bearing, Undersize 0.50 mm	Service part / kit
198517110	Bearing, Standard	Service part / kit
198517112	Bearing, Standard Lower	Service part / kit
198517114	Bearing, Standard	Service part / kit
198517116	Bearing, undersize 0.25 mm (formerly #198517115)	Service part / kit
198517119	Bearing, undersize 0.50 mm (formerly #198517118)	Service part / kit
198517125	Bushing	Service part / kit
198517132	Rod Bearing, Standard	Service part / kit
198517136	Rod Bearing, Undersize 0.25	Service part / kit
198517139	Rod Bearing, Undersize 0.50	Service part / kit
198517630	Bearing, undersize 0.50 mm (formerly #198517109)	Service part / kit
198736051	Bushing (Marine)	Service part / kit
198736120	Drain Cock (Marine)	Service part / kit
199236510	Collar	Service part / kit
20-12002	Heat Exchanger Element	Service part / kit
20-12019	End Cap	Service part / kit
20-12207	Filler Neck	Service part / kit
21-12008	Filler Cap	Service part / kit
21-12013	Filler Cap	Service part / kit
25-12004	Repair Kit	Service part / kit
27-32007	Elbow, Dry Exhaust	Service part / kit
34-70010	Oil Drain Kit Complete (includes all keys)	Service part / kit
36-72003	Drain Valve	Service part / kit
398430560	Cap (Marine application only — formerly #398430080)	Service part / kit
398460091	Plug	Service part / kit
753-012	Exhaust valve clearance adjustment screw	Service part / kit
B-8280E	AVR DST-100-2FAK	Service part / kit
130506140	Feed Pump Assembly	Pump
131017061	Injection Pump Assembly - see detail	Pump
131017290	Injection Pump Assembly - see detail	Pump
131017640	Injection Pump	Pump
145016310	Raw Water Pump Assembly, Lip Seal (replaced by 25-12057)	Pump
145016800	Raw Water Pump Assembly, Ceramic Seal (replaced by 25-12057)	Pump
145017300	Coolant Pump Assembly (Blue - Industrial, includes Keys #8, #9, #11 - #13. Formerly #145016430 & #145016431)	Pump
145017320	Coolant Pump Assembly (White - Marine, includes Keys #8, #9, #11 - #13. Formerly #145016690 & #145016691)	Pump
145017910	Coolant Pump Assembly	Pump
25-12001	Repair Kit for 145016310 Pump (includes Keys 2, 3, 5, 7-10, 13-14, 16B)	Pump
25-12003	Repair Kit for 145016800 Pump (includes Keys 3-7, 10, 13, 16A)	Pump
25-12057	Raw Water Pump	Pump
36-72002	Hand Pump	Pump
011150612	O-Ring	Seal
025100006	Seal Washer	Seal
025100010	Seal Washer	Seal
025100012	Seal Washer - Industrial	Seal
025100016	Seal Washer	Seal
052100030	O-ring	Seal
052100050	O-ring	Seal
052100070	O-ring	Seal
052100100	O-Ring	Seal
052100120	O-ring	Seal
052100150	O-Ring	Seal
052100400	O-ring	Seal
052109076	O-ring	Seal
052109078	O-ring, Relief Valve	Seal
052109108	O-ring, Governor Shaft	Seal
052109109	O-ring	Seal
052109110	O-ring	Seal
052109113	O-ring	Seal
052300300	O-Ring, Temperature Sender Holder	Seal
052300700	O-ring, Gear Case Cover	Seal
120406050	Valve Guide Seal - Exhaust	Seal
120406070	Valve Guide Seal - Intake	Seal
145126010	Seal	Seal
16-13101	O-ring	Seal
16-70001	O-ring	Seal
198486912	O-Ring	Seal
198636080	Oil Seal	Seal
198636090	Oil Seal	Seal
198636130	Rear Oil Seal	Seal
198636140	Oil Seal Assembly (Oil Seal and Sleeve)	Seal
25-12017	Spline Seal	Seal
25-12065	Lip Seal	Seal
25-12066	Mechanical Seal	Seal
25-12067	O-Ring	Seal
185246011	Oil pressure unit	Sensor
22-40086	Oil Pressure Sender, FD Gauges	Sensor
22-40087	Temperature Switch/Sender, VDO Gauges	Sensor
22-40176	Sender, Water Temperature - Single Station, YAZAKI guages	Sensor
22-40177	Sender, Oil Pressure - Single Station, YAZAKI guages	Sensor
22-40906	Engine Temperature Switch 3/8 NPT 210°F	Sensor
22-41016	Oil Pressure Sender	Sensor
22-41901	Temperature Sender, FD Gauges	Sensor
22-42055	Sender, Water Temperature - Single Station	Sensor
22-42070	Switch, High Exhaust Temperature & Harness Assembly	Sensor

Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.

Common questions

Which generators use the Northern Lights 753c engine?

The Northern Lights 753c powers 2 generator set(s), including Northern Lights M753, Northern Lights NL753.

What is a common problem with the Northern Lights 753c engine?

A commonly reported issue on generators using the Northern Lights 753c is: ENGINE HARD TO START OR WILL NOT START. Cause: Improper starting procedure (pages 10 and 11). No fuel. Low battery output. Check electrolyte level and specific gravity of battery (pages 14 and 28). Excessive resistance in starting circuit. Clean and tighten all connections on batteries (pages 13, 14 and 28). Crankcase oil too heavy. Use oil of proper viscosity (pages 13). Improper type of fuel. Consult fuel supplier and use proper type of fuel for operating condition. Water, dirt or air in fuel system. Drain, flush, fill and bleed system (pages 21 and 22). Clogged primary fuel filter element. Clean or replace filter element (pages 20 and 21). Clogged secondary fuel filter element. Replace filter element (page 21). Dirty or faulty injection nozzles. Have your dealer check injection nozzles (pages 22 - 24). Fuel pump primer lever left on upward end of stroke..