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Generac GN-410 Engine

The Generac GN-410 is a 0.41 L 1-cylinder engine rated at 4200 rpm, producing up to 10.8 kW. It powers generator sets from Generac, including the C9035, C9036, NP-50G and PRIMEPACT 50. It holds 1.4 L (0.4 gal) of oil.

Also known as: Generac GN-410, GN-410

Part of the Generac GN410 engine family — 2 variants share parts & fitment.

0.407 L

Displacement

Cylinders

4200 rpm

Rated speed

10 kW

Gross power

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

Engine specifications

Oil capacity	1.4 L
Displacement	0.407 L
Cylinders	1
Rated speed	4200 rpm
Gross power	10 kW

Generator sets powered by this engine

Generac C9035Generac C9036Generac NP-50GGenerac PRIMEPACT 50Generac PrimePact 50 LP

How to read your Generac engine serial & model number →

Common problems

The engine will not crank.
Cause: 1. Fuse blown 2. Loose, corroded or defective battery cables 3. Defective engine Start/Stop switch 4. Defective starter contactor 5. Defective starter motor 6. Low or defective battery
Fix: 1. Replace fuse. 2. Tighten, clean or replace battery cables as necessary. 3. Replace Start/Stop switch. 4. Replace contactor. 5. Replace starter motor. 6. Charge or replace battery.
The engine starts hard and runs rough.
Cause: 1. Air cleaner plugged or damaged 2. Defective spark plug(s)
Fix: 1. Check, clean or replace air cleaner. 2. Clean, re-gap or replace plug(s).
The engine cranks but will not start.
Cause: 1. Out of fuel 2. Defective fuel pump 3. Open #14 wire from engine control board 4. Flooded engine 5. Defective spark plug(s) 6. Fuel line shut-off closed 7. Plugged fuel filter
Fix: 1. Replenish fuel. 2. Replace fuel pump. 3. Check connections and insulation of #14 wires. 4. Wait 5-10 minutes before trying. 5. Clean, re-gap or replace plug(s). 6. Open fuel line shut-off. 7. Clean or replace fuel filter.
There is no AC output from the generator.
Cause: 1. Main line circuit breaker open 2. Fault with vehicle circuit breaker and/or fuses 3. Transfer switch set to NORMAL 4. Start switch not held long enough to flash the field (Hold Start switch for at least 2 seconds). 5. Generator internal failure
Fix: 1. Reset circuit breaker to ON (or closed). 2. Reset and replace if necessary. 3. Set switch to GENERATOR. 4. Stop, then restart the engine. 5. Contact a Generac Authorized Service Dealer.
The engine starts, but shuts down when the Start/Stop switch is released.
Cause: 1. Engine oil level low 2. Defective low oil pressure switch 3. Defective high temperature switch 4. Defective engine control board 5. Overheated engine
Fix: 1. Check oil and add oil as needed. 2. Replace pressure switch. 3. Replace temperature switch. 4. Replace control board. 5. Check that the airflow openings are adequate.
There is no transfer to standby after utility source failure.
Cause: 1. Defective transfer switch coil 2. Defective transfer relay 3. Transfer relay circuit open 4. Defective control logic board
Fix: 1. Replace defective transfer switch coil. 2. Replace defective transfer relay. 3. Close open transfer relay circuit. 4. Replace control logic board.
The Auto/Off/Manual switch is set to OFF, but the engine continues to run.
Cause: 1. Defective switch 2. Auto/Off/Manual switch wired incorrectly 3. Defective control board
Fix: 1. Replace defective switch. 2. Correctly wire Auto/Off/Manual switch. 3. Replace control board.
The Start/Stop switch is set to Stop, but the engine continues to run.
Cause: 1. Defective Start/Stop switch 2. Open/Disconnected #18 wire between Start/Stop switch and engine control board 3. Open/Disconnected #0 wire between Start/Stop switch and engine control board
Fix: 1. Replace switch. 2. Reconnect or close wire. 3. Reconnect or close wire.
Engine won't crank.
Cause: 1. 15 amp fuse blown. 2. Loose or corroded or defective battery cables as necessary. 3. Battery is discharged or defective. 4. Defective starter contactor. 5. Defective starter motor.
Fix: 1. Replace fuse. 2. Tighten, clean or replace battery cables as necessary. 3. Recharge or replace battery. 4. Replace if defective. 5. Replace if defective.
Weakness
Fix: Move into fresh air immediately. If symptoms persist, get medical help. Shut down the generator and do not operate it until it has been inspected and repaired.
Vomiting
Fix: Move into fresh air immediately. If symptoms persist, get medical help. Shut down the generator and do not operate it until it has been inspected and repaired.
Twitching muscles
Fix: Move into fresh air immediately. If symptoms persist, get medical help. Shut down the generator and do not operate it until it has been inspected and repaired.
Sleepiness
Fix: Move into fresh air immediately. If symptoms persist, get medical help. Shut down the generator and do not operate it until it has been inspected and repaired.
Inability to think coherently
Fix: Move into fresh air immediately. If symptoms persist, get medical help. Shut down the generator and do not operate it until it has been inspected and repaired.
Headaches
Fix: Move into fresh air immediately. If symptoms persist, get medical help. Shut down the generator and do not operate it until it has been inspected and repaired.

Compiled from service & troubleshooting documentation across every generator set that uses the Generac GN-410.

Maintenance schedule

Item	Spec	Capacity	Part #	Interval
Air filter	Flame retardant replacement required		073111	100 hr	Amazon eBay
Fuel filter	Replace once each year or every 100 hours		87769	100 hr	Amazon eBay $18.99 NAPA $6.96
Oil filter	Crankcase and oil filter capacity approximately 1,400 mL or 1.5 U.S. quarts		070185	100 hr	Amazon eBay $30.00 NAPA $3.59 FridayParts $45.99
Battery	400 Cold-cranking Amperes; battery charge 14 Volts DC, 2 Amperes (max)		—
Belt	POLY V 4L, 40 inch		075216		Amazon eBay
Oil	SAE 30 (summer), SAE 10W-30 acceptable substitute, SAE 5W-30 (winter); API Service Classification SF, SG or SH	1400.0 mL	—	100 hr
Spark plug	Champion RC14YC; AC R45S; Fram Autolite 65; gap 0.030 inch		0E7585	100 hr	Amazon eBay $12.77 NAPA $5.48

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
Engine oil level	Check	8 hr		Or before use; at least every eight hours of operation
25-hour break-in check-up	Inspect	25 hr		First service — Change crankcase oil and oil filter; inspect cooling/ventilation openings, ignition, electrical and exhaust systems
25-hour break-in check-up	Other	25 hr		First service — Change crankcase oil and oil filter, check oil level, inspect cooling/ventilation openings, check carburetor and ignition adjustments, inspect electrical system and exhaust system
25-hour check up	Other	25 hr		First service — After 25-hour break-in: change oil and oil filter, check oil level, inspect cooling/ventilation openings, check carburetor adjustments, check ignition system, inspect electrical system, inspect exhaust system
Air cleaner foam precleaner (6 kW)	Clean	25 hr	3 mo	Every 25 H or every 3 months, whichever occurs first
Cooling and ventilation openings	Inspect	25 hr		First service — 25-hour check-up
Engine carburetor adjustments	Check	25 hr		First service — 25-hour check-up
Engine exhaust system	Inspect	25 hr		First service — 25-hour check-up
Engine exhaust system and 25-hour check-up	Inspect	25 hr		First service — After 25-hour break-in: change crankcase oil and oil filter, check oil level, inspect cooling/ventilation openings, check carburetor adjustments, check ignition system, inspect entire electrical system, inspect exhaust system
Engine ignition system	Check	25 hr		First service — 25-hour check-up
Entire electrical system	Inspect	25 hr		First service — 25-hour check-up
Foam pre-cleaner	Clean	25 hr	3 mo	Every three months or 25 operating hours, whichever comes first; more often in dusty conditions
Foam precleaner	Clean	25 hr	3 mo	Whichever occurs first; more often in dusty conditions
Oil filter	Change	200 hr		First service — First oil filter change after first 25 hours
Engine oil	Change	100 hr		First service — Thereafter every 50 operating hours; more often under heavy load or high ambient temperature
Air cleaner	Replace	100 hr		100 H and yearly
Air intake	Clean	100 hr		Clean more often if necessary
Air intake screen	Clean	100 hr		Clean all foreign material at least once every 100 hours
Engine crankcase oil	Change	100 hr		First service — First change after 25-hour break-in; change more often under heavy load or high ambient
Engine oil filter	Change	100 hr		First service — First change after 25-hour break-in
Engine spark plug	Clean	100 hr		Clean and set gap to 0.030 inch (0.76mm) every 100 hours
Fuel filter	Replace	100 hr	12 mo	Once each year or every 100 hours, whichever comes first (gasoline only)
Oil	Change	100 hr		First service — After break-in, every 100 H and yearly
Oil line leakage	Inspect	100 hr
Paper air filter	Clean	100 hr	12 mo	Clean or replace; replacement must be flame retardant
Paper air filter	Replace	100 hr	12 mo	Once each year or every 100 hours, whichever comes first; must be flame retardant type
Paper air filter element	Replace	100 hr	12 mo	Once each year or every 100 hours of operation, whichever comes first
Spark plug	Adjust	100 hr		Clean spark plug and reset gap every 100 hours of operation
Spark plug	Clean	100 hr		Clean the spark plug and reset the spark plug gap every 100 hours
Spark plug gap	Adjust	100 hr		Adjust gap to 0.030 inch (0.76 mm)
Spark plug(s)	Replace	100 hr		Inspect; replace as necessary; 100 H and yearly
Battery	Check		6 mo	Every Six Months (Section 3.9.2)
Battery	Test		6 mo	Every six months check state of charge and condition with an automotive battery hydrometer
Battery charge state	Test		6 mo	Every 6 months; replace as necessary
Battery corrosion / dryness	Clean		1 mo	Monthly
Battery electrolyte level	Check		6 mo	Unsealed batteries only
Battery state of charge	Test		6 mo	Every six months: check state of charge and condition with an automotive-type hydrometer
Battery state of charge and condition	Test		6 mo	Every six months with automotive type battery hydrometer
Battery terminals	Clean		1 mo	Clean and tighten, monthly
Complete tune-up	Other		12 mo	To be completed by a Generac/Guardian Authorized Dealer; yearly

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	Exhaust system clearance to combustible material	3	inches (76mm)
Clearance	Generator compartment clearance on sides	1	inch
Clearance	Generator compartment clearance on top	1-1/2	inches
Gap	Spark plug gap	0.030	inch
Gap	Spark plug gap	0.030 inch (0.8 mm)	inch (0.8 mm)
Gap	Spark plug gap	0.76	mm
Gap	Spark plug gap	0.76 mm (0.030 inch)	mm
Gap	Spark plug gap (Section 3.5)	0.030 inch (0.76 mm)	inch (0.76 mm)
Other	AC Current (LP Fuel)	37.5	Amperes	at 120 volts
Other	AC Output (LP Fuel)	4,500	Watts (4.5 kW)
Other	Air inlet opening	100	square inches	minimum
Other	Battery Charge Current (max)	2	Amperes
Other	Battery amp-hour rating	70	amp-hour	above 32°F (0°C)
Other	Battery amp-hour rating	95	amp-hour	below 32°F (0°C)
Other	Battery charge current	2	Amperes (max)
Other	Battery grounding	Negative (-)
Other	Battery voltage	12	volts DC
Other	Battery voltage drop	0.12	volts per 100 amperes
Other	Cold cranking amperes	360	CCA	above 32°F (0°C)
Other	Cold cranking amperes	450	CCA	below 32°F (0°C)
Other	Compartment clearance - front and top	1/2	inch
Other	Compartment clearance - sides	1	inch
Other	Compression ratio	8.6 to 1
Other	Compression ratio	8.6:1
Other	Crank cycle OFF time	15	seconds	overcrank cycle
Other	Crank cycle OFF time	7	seconds	overcrank cycle
Other	Crank cycle ON time	15	seconds	overcrank cycle
Other	Crank cycle ON time	7	seconds	overcrank cycle
Other	Crankcase oil capacity	1.5	U.S. quarts (1.6 liters)
Other	Cranking current	100	DC amperes
Other	Displacement	363	cc
Other	Displacement	480	cc
Other	Displacement	570	cc
Other	Exhaust extension past vehicle outer edge	1	inch (25 mm)	at least
Other	Exhaust temperature rise maximum	117	°F (65°C) above ambient
Other	Exhaust-to-combustible material clearance	3	inch
Other	Flexible fuel hose length	6	inches longer than necessary
Other	Fuel line clearance from exhaust	2	inches
Other	Fuel line clearance from exhaust system parts	2	inches (51 mm)	at least
Other	Fuel octane	87	minimum octane rating	gasoline
Other	Generator compartment clearance (back)	1/2	inch (13 mm)	minimum
Other	Generator compartment clearance (front and top)	1/2	inch (13 mm)	minimum
Other	Generator compartment clearance (sides)	1	inch (25 mm)	minimum
Other	LP gas connection size	3/4	inch (female)
Other	LP gas leak test pressure	90	psi (620 kPa)	not less than
Other	LP gas supply pressure at gaseous fuel solenoid/secondary regulator	11	inches water column	optimum; do not exceed 14 inches water column
Other	Minimum cooling air inlet opening	100	square inches
Other	Minimum gas flow rate	67	cubic feet per hour
Other	Minimum gas flow rate (all air-cooled PRIMEPACT)	67	cubic feet per hour
Other	Rated Horsepower	15	hp	@ 4,200 rpm
Other	Rated Maximum Continuous AC Current (Gasoline)	40	Amperes	at 120 volts
Other	Rated Maximum Continuous AC Output (Gasoline)	4,800	Watts (4.8 kW)
Other	Rated horsepower	13	horsepower	at 3600 RPM
Other	Rated horsepower	16	horsepower	at 3600 RPM
Other	Rated horsepower	19	horsepower	at 3600 RPM
Other	Recommended Minimum Battery	400	Cold-cranking Amperes
Other	Recommended minimum LP gas flow rate	67	cubic feet per hour
Other	Total approximate crank cycle time	90	seconds
Other	Voltage drop between battery terminals and generator connection point	0.12	volts per 100 amperes of cranking current
Pressure	Fuel supply pressure (natural gas and LP)	11 to 14 inches water column (0.6 psi)	inches water column	at all load ranges

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
Engine oil	SAE 10W-30	For Service SF		1.5 U.S. quarts	1.6 liters
Engine oil	SAE 10W-30 with API classification 'For Service SF'	API 'For Service SF'			Storage (out-of-service) refill oil
Engine oil	SAE 30	API Service Classification SF, SG or SH			Summer months; acceptable substitute is SAE 10W-30
Engine oil	SAE 30 (summer); SAE 10W-30 acceptable substitute (summer); SAE 5W-30 (winter)	API Service Classification SF, SG or SH		1.0 mL	Crankcase and oil filter capacity approximately 1,400 mL or 1.5 U.S. quarts. Do NOT use SAE 10W-40. Do NOT use special additives.
Engine oil	SAE 30 (summer); SAE 10W-30 acceptable substitute; SAE 5W-30 (winter)	API service classification SF, SG or SH		1.4 liters	Crankcase and oil filter capacity about 1400ml or about 1.5 U.S. quarts. Do not use SAE 10W-40. Use no special additives.
Engine oil	SAE 30 (summer); SAE 10W-30 acceptable substitute; SAE 5W-30 (winter); do not use SAE 10W-40	API Service Classification SF, SG or SH		1400.0 mL	Crankcase and oil filter capacity approx. 1400 mL or 1.5 U.S. quarts; do not use special additives
Engine oil	SAE 30 (summer); SAE 5W-30 (winter); SAE 10W-30 acceptable summer substitute	API Service Classification SF, SG or SH		1.4 L	Crankcase and oil filter capacity approximately 1,400 mL or 1.5 U.S. quarts. Do NOT use SAE 10W-40. Do not use special additives.
Engine oil	SAE 30 (summer); SAE 5W30 (winter); SAE 10W-30 acceptable substitute in summer	API service classification SF, SG, or SH		1.4 L	DO NOT USE SAE 10W40. Crankcase and oil filter capacity about 1400ml or about 1.5 U.S. quarts. Use no special additives. For storage, use SAE 10W30, API 'For Service SF'.
Engine oil	SAE 5W-20 or 5W-30	API Service Class SG, SH or SJ	below -7°C		Below -7 C (20 F)
Engine oil	SAE 5W-30	API Service Classification SF, SG or SH			Winter months; DO NOT USE SAE 10W-40
Engine oil	SAE 5W-30 Synthetic				All seasons; organic break-in oil required before using synthetic oil
Engine oil	SAE 10W-30 or SAE 30	API Service Class SG, SH or SJ	above -7°C		Above -7 C (20 F)
Fuel		Natural gas Btu content at least 1,000 Btus per cubic foot			LP gas Btu content at least 2,520 Btus per cubic foot
Fuel	Commercial propane gas				Vapor withdrawal type system only
Fuel	High quality UNLEADED gasoline				Leaded REGULAR grade is an acceptable substitute. Gasoline containing alcohol (gasohol) not recommended; if used must not exceed 10 percent ethanol and must be removed during storage. Do NOT use gasoline containing methanol.
Fuel	High quality UNLEADED gasoline (leaded REGULAR grade acceptable substitute)				Gasoline with alcohol must not contain more than 10 percent ethanol; do not use methanol
Fuel	High quality unleaded gasoline; leaded REGULAR grade acceptable substitute	If gasoline contains alcohol, not more than 10 percent ethanol and must be removed during storage; do NOT use gasoline containing methanol			PRIMEPACT 50 (02010-0) gasoline; PRIMEPACT 50 LP (04164-0) liquid propane gas, vapor withdrawal only. Propane vaporizes as low as -20 F (-29 C); butane returns to liquid below about 32 F (0 C).
Fuel	High quality unleaded gasoline; leaded REGULAR grade an acceptable substitute				Do not use gasoline containing alcohol; if used, must not contain more than 10 percent ethanol and must be removed during storage. Do NOT use gasoline containing methanol.
Fuel	LP gas (vapor withdrawal)	Propane vaporizes at -20 F (-29 C); butane below about 32 F (0 C) returns to liquid			Model 04164-0; vapor withdrawal system required
Fuel	Liquid propane (LP) gas - vapor withdrawal type system				LP gas may be propane, butane or a mixture. Propane vaporizes as low as -20 F (-29 C); butane returns to liquid below about 32 F (0 C). Higher propane ratio desired below freezing.
Fuel	Liquid propane (LP) gas, vapor withdrawal type	Propane/butane mixture; higher propane ratio desired below freezing			Optional LP fuel system
Fuel	UNLEADED gasoline, minimum octane rating 87				Leaded REGULAR grade gasoline acceptable substitute. For gasoline-powered units.
Fuel	Unleaded gasoline	Do not use gasoline with more than 10 percent ethanol; do NOT use methanol			Leaded regular grade acceptable substitute (gasoline model 02010-0)
Fuel	Unleaded gasoline with minimum octane rating of 87				Leaded REGULAR grade gasoline is an acceptable substitute
Other	Distilled water (battery cells)				DO NOT USE TAP WATER IN BATTERY
Other	LP gas (liquid propane, vapor withdrawal type)		above -29°C		Propane vaporizes as low as -20 °F (-29 °C); butane returns to liquid below about 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

Adjusting No-Load Frequency (NP-50G/LP) adjustment

⚠ Avoid overspeeding the engine.

Tools: Pliers, Wrench

Loosen governor clamp bolt.
Push spring end of governor lever clockwise to wide open throttle position.
Hold governor lever at wide open throttle. With pliers, rotate governor shaft fully counterclockwise.
While holding shaft fully clockwise and lever at wide open throttle, tighten governor clamp bolt to 70 inch-pounds (8 N-m).
Start engine, let it stabilize and warm up at no-load.
Turn adjuster nut to obtain frequency reading of 62 Hertz.
Check governor spring location in slot of governor lever. Move spring down one slot for excessive droop; up one slot for greater stability.
After repositioning spring, recheck frequency and readjust adjuster nut if necessary.
Check AC voltage reading. If incorrect, voltage regulator may require adjustment.

Adjusting No-Load Frequency (Q-40G, NP-66G/LP, Q-55G/LP, Q-70G/LP) adjustment

⚠ Avoid overspeeding the engine.

Tools: Screwdriver, Wrench

Loosen governor clamp nut.
Push spring end of governor lever all the way up to wide open throttle position.
Hold governor lever at wide open throttle. Insert screwdriver into slotted end of governor shaft. Rotate governor shaft fully counterclockwise.
While holding governor shaft fully counterclockwise and lever at wide open throttle, tighten governor clamp nut to 70 inch-pounds (8 N-m).
Start engine, let it stabilize and warm up at no-load.
Turn adjuster nut to obtain frequency reading of 62 Hertz.
Check governor spring location. Move spring left on bracket teeth for excessive droop; right for greater stability.
After repositioning spring, recheck frequency and readjust adjuster nut if necessary.
Check AC voltage reading. If incorrect, voltage regulator may require adjustment.

Adjusting No-Load Frequency for NP-50G/LP adjustment

Tools: pliers

Loosen governor clamp bolt.
Push spring end of governor lever clockwise to wide open throttle position of lever.
Hold governor lever at wide open throttle and, with pliers, rotate governor shaft fully counterclockwise.
While holding governor shaft fully clockwise and governor lever at wide open throttle, tighten governor clamp bolt to 70 inch-pounds (8 N-m).
Start engine; let it stabilize and warm up at no-load.
Turn adjuster nut to obtain a frequency reading of 62 Hertz.
Check governor spring location in slot of governor lever.
If droop is excessive, move governor spring down one slot on lever.
For greater stability, move governor spring up one slot on lever.
Recheck frequency reading; readjust adjuster nut if necessary to obtain 62 Hertz at no-load.
When frequency is correct at no-load, check AC voltage; voltage regulator may require adjustment.

Adjusting No-Load Frequency for Q-40G, NP-66G/LP, Q-55G/LP, Q-70G/LP adjustment

Tools: screwdriver

With engine stopped, inspect anti-lash spring. Replace if broken or damaged; attach if disconnected.
Loosen governor clamp nut.
Push spring end of governor lever all the way up to wide open throttle position.
Hold governor lever at wide open throttle and insert screwdriver into slotted end of governor shaft.
Rotate governor shaft fully counterclockwise (CCW).
While holding shaft fully counterclockwise and lever at wide open throttle, tighten governor clamp nut to 70 inch-pounds (8 N-m).
Start engine; let it stabilize and warm up at no-load.
Turn adjuster nut to obtain a frequency reading of 62 Hertz.
Check governor spring location in notched teeth of governor adjustment bracket.
If droop is excessive, move governor spring to the left on notched teeth of bracket.
For greater stability, move governor spring to the right on notched teeth of bracket.
Recheck frequency reading; readjust adjuster nut if necessary to obtain 62 Hertz at no-load.
When frequency is correct at no-load, check AC voltage; voltage regulator may require adjustment.

Reconfiguring the Fuel System (NG to LP) adjustment

⚠ Gaseous fuels are highly explosive; no leakage permitted

Remove carburetor fuel hose from natural gas port of fuel load block and brass fitting.
Remove blanking plug from LP port of load block.
Refit fitting and hose to LP port and blanking plug to natural gas port.
Reverse procedure to convert back to natural gas.

Voltage Regulator Adjustment adjustment

Tools: screwdriver

Remove generator control panel cover and front panel.
With frequency at 62 Hertz, AC voltage should read 124 volts.
If voltage is incorrect, slowly turn VOLTAGE ADJUST POT on voltage regulator until AC voltage is correct.

Checking No-Load Voltage and Frequency diagnostic

Tools: AC voltmeter, AC frequency meter

Connect an accurate AC voltmeter and AC frequency meter across generator AC output leads.
With generator running, stabilized, and warm, check AC frequency and voltage. Frequency should be about 62 Hz; voltage about 122-126 volts AC.
If frequency is high or low, adjust engine governor to obtain 62 Hertz at no-load; then recheck voltage reading.
If frequency is good but voltage is high or low, adjust voltage regulator to obtain 124 volts at 62 Hz no-load.

LP Gas Leakage Test diagnostic

⚠ Do not use any flame to test for leaks.

⚠ No leakage is permitted.

Tools: separate 12 volts DC source, soap and water or equivalent solution

Use a separate source of 12 volts DC to open the gaseous fuel solenoid valve.
Test all connections, hoses, valves, regulators, fittings, and other fuel system parts under gas or air pressure of not less than 90 psi (620 kPa).
Use soap and water or equivalent solution to check for leaks.
Do not use any flame to test for leaks.
Comply with NFPA Paragraph 318.

Leakage Tests diagnostic

⚠ Do not use any flame to test for leaks.

Tools: Soap and water solution, 12 volts DC source

Do not place generator into service until gas system properly tested for leaks.
Use separate source of 12 volts DC to open gaseous fuel solenoid valve.
Test all connections, hoses, valves, regulators, fittings under gas or air pressure of not less than 90 psi (620kPa).
Use soap and water or equivalent solution to check for leaks.
Do not use any flame to test for leaks.

Testing Under Load diagnostic

Tools: AC frequency meter

Apply electrical loads equal to about 75-100% of unit's rated wattage/amperage capacity.
Check frequency with electrical load applied; frequency should not drop below about 58 Hz under load.
Let unit run at least 30 minutes with load applied; check unit is not running excessively hot and adequate cooling air flow is available.
Do not allow unit to overheat during prolonged operation.

Battery Cable Connections installation

⚠ Be sure the battery cable boot for the starter cable has been installed.

⚠ Damage will result if the battery connections are made in reverse.

Connect the battery cable from the POSITIVE, POS or (+) post to the lug on the starter contactor.
Connect the battery cable from the NEGATIVE, NEG or (-) post to the frame ground connection.
Connect cables so the connectors are clean and tight.

Before Initial Start-up (Post-Installation) installation

⚠ If an LP gas fuel system has been installed it must be properly tested for leaks before operating; no leakage is permitted.

Check the engine crankcase oil level and fill to the dipstick FULL mark with the recommended oil.
Check the fuel supply; gas fuel lines must have been properly purged and leak tested.
Ensure all fuel shutoff valves in the fuel supply lines are open.

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

Voltage reconnection

Voltage	Phase	Connection	Leads	Notes
120	1	T1 (red) to Neutral	T1, neutral	After dual voltage reconnection.
120	1	T1 (red) to T2 (white)	T1, T2	Line-to-neutral; protected by circuit breaker CB1; up to 3600 watts.
120	1	T1 (red) to T2 (white) neutral	T1, T2	Protected by circuit breaker CB1; use separately for 120 volts, 1-phase, 60 Hz loads up to 3600 watts (3.6 kW).
120	1	T3 (black) to Neutral	T3, neutral	After dual voltage reconnection.
120	1	T3 (black) to T2 (white)	T3, T2	Line-to-neutral; protected by circuit breaker CB2.
120	1	T3 (black) to T2 (white) neutral	T3, T2	Protected by circuit breaker CB2; total unit load must not exceed maximum rating.
120	Single	T1 (red) to T2 (white)	T1, T2	Protected against overload by a 30-amp circuit breaker (CB1); loads must not exceed 30 amperes or 3,600 watts
120	Single	T1 (red) to T2 (white) - grounded neutral	T1 (red), T2 (white), T3 (black), green ground	Protected by 30-amp circuit breaker CB1; loads must not exceed 30 amperes or 3,600 watts
120	Single	T3 (black) to T2 (white)	T3, T2	Protected against overload by a 20-amp circuit breaker (CB2); loads must not exceed 20 amperes or 2,400 watts
120	Single	T3 (black) to T2 (white) - grounded neutral	T1 (red), T2 (white), T3 (black), green ground	Protected by 20-amp circuit breaker CB2; loads must not exceed 20 amperes or 2,400 watts
120	single	Figure 1 - Connections for 120 Volts Only	dual 2-wire connection system; neutral grounded	Dual stator AC power windings; generator may have been installed to power 120 volts AC loads
120	single	T1 (red) to T2 (white)	T1 (red), T2 (white)	Protected by 30-amp circuit breaker (CB1); up to 3,600 watts (3.6 kW). T2 is grounded neutral.
120	single	T1 (red) to T2 (white); T3 (black) to T2 (white)	T1 (red) hot, T2 (white) grounded neutral, T3 (black) hot, green ground	T2 is a grounded neutral; separate green ground wire connects to the vehicle junction box. T1-T2 protected by 30-amp breaker (max 3,600 watts); T3-T2 protected by 20-amp breaker (max 2,400 watts); combined loading of the two breakers should not exceed 5,500 watts.
120	single	T3 (black) to T2 (white)	T3 (black), T2 (white)	Protected by 20-amp circuit breaker (CB2); up to 2,400 watts. Combined loading of the two breakers should not exceed 5,500 watts.
120/240	1	Stator leads 11 and 44 to new circuit breaker; 22 and 33 to grounding terminal	11, 44, 22, 33	Reconnection procedure for dual voltage output.
120/240	1	Stator leads 11 and 44 to new circuit breaker; stator leads 22 and 33 to grounding terminal	11, 44, 22, 33	Dual voltage reconnection procedure. Not applicable to Q-40G.
120/240	Single	Dual voltage reconnection	T1 (red), T2 (white), T3 (black), green ground	T2 (white) is the grounded neutral; green lead connects to ground in the vehicle junction box; units no longer listed per RVIA/ANSI when reconnected for dual voltage output
120/240	Single	Reconnect with a jumper wire installed between the circuit breakers	T1 (red), T2 (white), T3 (black), green ground	240-volt ampere rating is 20 AC amperes for PRIMEPACT 50 (02010-0) and 18.8 AC amperes for PRIMEPACT 50LP (04164-0); no longer RVIA/ANSI listed when reconnected for dual voltage
120/240	single	Dual voltage - install jumper wire between the circuit breakers when reconnecting		All units are reconnectable to 120 and/or 240 volts dual voltage output; units are no longer listed per RVIA/ANSI when reconnected for dual voltage output. Refer to the Installation Manual.
120/240	single	Reconnectable for 120- and/or 240-volt dual voltage output	T1 (red), T2 (white), T3 (black), green ground	Units are no longer listed per RVIA/ANSI when reconnected for dual voltage output. 240-volt rating 20 A (02010-2) or 18.8 A (04164-2).
230	Single	Dual two-wire connection system; neutral is grounded; one side of the winding is grounded	T1 (red) 'hot', T3 (black), green ground wire	Dual stator AC power windings; solid-state voltage regulator connected across 1/2 of the output winding, regulating at 115 volts when AC frequency is 50 Hertz
240	1	T1 (red) to T3 (black)	T1, T3	Dual voltage; neutral T2.
240	1	T1 to T3	T1, T3	After dual voltage reconnection. Replace CB1 and CB2 with a single suitably rated circuit breaker.

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 Generac GN410 family

300

Part #	Description	Category
073111	FILTER, AIR	Air filter
081646	PRE-CLEANER, AIR FILTER	Air filter
70941	FILTER, AIR	Air filter
73111	FILTER, AIR	Air filter
73114	FILTER, AIR	Air filter
81646	PRE-CLEANER, AIR FILTER	Air filter
A6564	BASE, AIR CLEANER 27 = 91161 1 BOLT, SHOULDER M6-1.0 x	Air filter
C1228	DECAL, AiR CLEANER 13"	Air filter
C1753	ALTERNATOR PULLEY 21 C1751 1 ALTERNATOR FAN MODEL	Alternator
083049	REGULATOR VOLTAGE	Avr
83049	REGULATOR VOLTAGE	Avr
029459	SPRING, BELT TENSION	Belt
075216	BELT (POLY V 4L)-40"	Belt
75216	40" Poly Vinyl 4L Belt	Belt
76216	BELT (POLY V 4L)-40"	Belt
A9064	10KW ROTOR ASSEMBLY 14 29459 2 BELT TENSIONING SPRING	Belt
C1112	V-BELT 04079 (8”)	Belt
066386	ASSEMBLY, BRUSH HOLDER	Brush
66386	BRUSH HOLDER	Brush
87769	FUEL FILTER	Fuel filter
021713B	CYLINDER HEAD GASKET	Gasket
076701	CRANKCASE GASKET	Gasket
077643	GASKET, EXHAUST OUTLET	Gasket
080308	BREATHER GASKET	Gasket
086999	GASKET, OIL FILTER SUPPORT	Gasket
089228	GASKET, CARB/MANIFOLD	Gasket
090239	GASKET, EXHAUST MANIFOLD	Gasket
090970	GASKET, CARB/AIR FILTER	Gasket
091039	GASKET, MANIFOLD/HEAD	Gasket
0A6858	GASKET, COLLECTOR PAN	Gasket
0A8010	GASKET, BLOWER HOUSING	Gasket
0A8010A	GASKET, BLOWER HOUSING	Gasket
0A8407	GASKET, BLOWER SIDE	Gasket
0A8726	GASKET, BLOWER / PAN	Gasket
0C3150	ROCKER COVER GASKET	Gasket
0C4647	GASKET, SOLENOID	Gasket
0C6069	GASKET, DIAPHRAGM	Gasket
21713B	CYLINDER HEAD GASKET	Gasket
66480	Air Cleaner Gasket	Gasket
70987	ROCKER COVER GASKET	Gasket
71987	ROCKER COVER GASKET	Gasket
74948	FITTING, 5/16" COMPRESSION 76 ©1950 2 GASKET, EXHAUST	Gasket
75229	Slide Pan Gasket	Gasket
76701	CRANKCASE GASKET	Gasket
77643	GASKET, EXHAUST OUTLET	Gasket
80308	BREATHER GASKET	Gasket
86999	GASKET, OIL FILTER SUPPORT	Gasket
89228	GASKET, CARB/MANIFOLD	Gasket
90239	GASKET, EXHAUST MANIFOLD	Gasket
90970	GASKET, CARB/AIR FILTER	Gasket
91039	GASKET, MANIFOLD/HEAD	Gasket
91519	GASKET, OIL FILTER SUPPT.	Gasket
92363	Heat Riser Box Gasket	Gasket
92645	Collector Pan Gasket	Gasket
95277	Outlet Adaptor Gasket	Gasket
A6796	GASKET, MUFFLER	Gasket
A6858	GASKET, COLLECTOR PAN	Gasket
A7299	OIL DRAIN/DIPSTICK TUBE 49 90239 1 GASKET	Gasket
A8010	GASKET, BLOWER HSNG	Gasket
A8010A	GASKET, BLOWER HSNG	Gasket
A8407	GASKET, BLOWER SIDE	Gasket
A8693	GASKET, BLOWER HOUSING	Gasket
A8726	GASKET, BLOWER / PAN	Gasket
C1441	GASKET SET, BLOWER 26 22145 3 5/16 FLAT WASHER	Gasket
C1557	O-RING, 13/16" LD. 74 01624 2 EXHAUST GASKET	Gasket
C1625	GASKET, INTAKE 54 65852 1 CLIP	Gasket
C1626	GASKET, CARBURETOR 58 22129 6 5/16" LOCK WASHER	Gasket
C2310	GASKET, SET-MUFFLER BOX	Gasket
C3150	ROCKER COVER GASKET	Gasket
C5401	GASKET, MUFFLER	Gasket
031791	CLAMP, HOSE	Hose
057822	CLAMP HOSE #8 .53-1.00	Hose
074994	1/2 I.D. X 10" LONG HOSE	Hose
0A6581A	BREATHER, TUBE	Hose
0A9539	OIL DRAIN HOSE ASSEMBLY	Hose
30340	1/4" FUEL LINE (8" LONG)	Hose
35685	CLAMP, HOSE #28 33° 22413 8 CAPSCR., HEX HD.-1/4"-20 x 1"	Hose
43791	Hose, 3/8" I.D.	Hose
442498	1/4 Dia. 250mm Fuel Hose	Hose
57822	CLAMP, HOSE #8	Hose
63463	BARBED HOSE FITTING 34. C2417 1 GROUND STRAP	Hose
74994	1/2" I.D. x 10" LONG HOSE	Hose
8622413	Y%4-20 x 1° HEX HEAD BOLT 70 ©2078 1 OIL DRAIN HOSE	Hose
91648	"O" Ring DIA.-14 X 3 WALL	Hose
A6581	BREATHER, TUBE	Hose
A6922	FUEL TUBE, METAL	Hose
A9539	OIL DRAIN HOSE ASSEMBLY	Hose
C1702	BREATHER HOSE	Hose
C2206	BARBED HOSE FITTING 31 22237 2 3/8" LOCK WASHER	Hose
C2423	NUT, SPEED CONTROL 69 43790A 1 90 DEG. HOSE FITTING	Hose
070185	FILTER, OIL	Oil filter
070185B	FILTER, OIL	Oil filter
70185	FILTER, OIL	Oil filter
82774	FILTER, OIL	Oil filter
A5360	OIL FILTER SUPPORT	Oil filter
A6358	COVER, TOP FLYWHEEL 35 90892 1 SUPPORT, OIL FILTER	Oil filter
A6898	OIL FILTER SUPPORT 79° = 73132 2 BOOT, SPARK PLUG	Oil filter
0213B	STAND-OFF	Service part / kit
021533	SET, PISTON RING 90MM	Service part / kit
022676	FUSE AGC-15A.	Service part / kit
031971	BEARING #6205 2NSE C3 E SRI2 S	Service part / kit
04164	CRANKSHAFT ASSEMBLY	Service part / kit
053407	GROUND CABLE	Service part / kit
053623	C/BREAKER 2.5A.-ON	Service part / kit
065795	BATTERY CHARGER RECTIFIER	Service part / kit
073106B	PULLEY, ALT.	Service part / kit
073159	BEARING	Service part / kit
075224B	PULLEY, ENGINE	Service part / kit
075234	Resistor	Service part / kit
075242	SPRING, GENERATOR MOUNT	Service part / kit
077158	OIL SCREEN PICKUP ASSEMBLY	Service part / kit
080309	BREATHER COVER	Service part / kit
080338	OIL BREATHER SEPARATOR	Service part / kit
083921	BEARING TUBE SHAFT	Service part / kit
086025	SET GEROTOR	Service part / kit
086516	VALVE, EXHAUST	Service part / kit
086517	INTAKE VALVE	Service part / kit
087798	SWITCH S.P.D.T.	Service part / kit
090144	C/BREAKER 20A.	Service part / kit
090145	C/BREAKER 30A. ALL UNITS	Service part / kit
090747	BREATHER VALVE ASSEMBLY	Service part / kit
092113	SWITCH S.P.D.T.-(FUEL PUMP)	Service part / kit
092362	ROCKER COVER W/FILL	Service part / kit
092572	ASSEMBLY, IGNITION COIL	Service part / kit
093064	ASSEMBLY, OIL FILL CAP	Service part / kit
094039	CONTROLLER P.C.B.	Service part / kit
0A2666	GASEOUS FUEL SOLENOID	Service part / kit
0A5646H	STATOR ASSEM.	Service part / kit
0A5649H	ROTOR ASSEM.	Service part / kit
0A5771	OIL PRESSURE SPRING	Service part / kit
0A6778	SPRING, A/L GOV. LEVER-BELLCRANK	Service part / kit
0A6780	SPRING, A/L BELLCRANK-CARB.	Service part / kit
0A6894	MANIFOLD, LP	Service part / kit
0A7299	OIL DRAIN/DIPSTICK TUBE	Service part / kit
0A7336B	CARBURETOR, GN 410 L/P	Service part / kit
0A7660	VALVE, WINTER/SUMMER	Service part / kit
0A7975	GOVERNOR GEAR ASSEMBLY	Service part / kit
0A8222	SPRING, GOVERNOR	Service part / kit
0A8875	ASSEMBLY, DIPSTICK & CAP	Service part / kit
0A9877	CAMSHAFT ASSEMBLY	Service part / kit
0C4391	VALVE SPRING	Service part / kit
0C4706	DIAPHRAGM, TWIN REGULATOR	Service part / kit
0C5760	JET LP GN220 ENGINE	Service part / kit
0C5764A	SPRING, REGULATOR 45N/M 29MM	Service part / kit
0C6070	SPRING-SOLENOID PLUNGER	Service part / kit
0C7108	Scheduled maintenance kit	Service part / kit
0D2530	REGULATOR, GAS FUEL	Service part / kit
0D9004A	ASSY, STATER MOTOR	Service part / kit
0D9853B	PUSH ROD	Service part / kit
0E1466	PIN PISTON	Service part / kit
0E2985	PISTON	Service part / kit
0E3221	ASSEMBLY, CONNECTING ROD	Service part / kit
0E9649	ENGINE, LONG BLOCK-GN410VSRV	Service part / kit
0E9667	OIL SUMP ASSEMBLY	Service part / kit
0F5022	SOLENOID COIL, 12VDC	Service part / kit
20753	HHCS-M6-1.0 x 60 LG 35 22145 1 M8-FLAT WASHER	Service part / kit
21533	PISTON RING SET	Service part / kit
21714	CYLINDER HEAD W/VALVE 55 C3150 j ROCKER COVER GASKET	Service part / kit
21742	M10 1.5 x 105MM HHFL 37 A8930 1 GOVERNOR GEAR ASSEMBLY	Service part / kit
22097	M6 LOCK WASHER	Service part / kit
22127	HEX NUT 7/4"-20	Service part / kit
22129	LOCK WASHER-M8	Service part / kit
22131	3/8" FLAT WASHER	Service part / kit
22145	M8 FLAT WASHER	Service part / kit
22152	LOCK WASHER NO. 10	Service part / kit
22237	3/8" LOCK WASHER	Service part / kit
22241	3/8"- 16 HEX NUT	Service part / kit
22259	5/16"- 18 HEX NUT	Service part / kit
22264	M4 LOCK WASHER 45 A9992B 2 END BRACKETS	Service part / kit
22287	%-20 x 9%" HEX HEAD LOCK WASHER	Service part / kit
22413	%-20 x 1" HEX HEAD BOLT	Service part / kit
22473	WASHER, FLAT 1/4" 54 22152 8 #10 LOCK WASHER	Service part / kit
22507	A2311	Service part / kit
22676	15 Amp Fuse	Service part / kit
22985	M4/#6 FLAT WASHER	Service part / kit
23484F	SNAP BUSHING A9947 1 25A CIRCUIT BREAKER (6KW)	Service part / kit
23897	#10 FLAT WASHER	Service part / kit
24912	44-20 X 5/8" TAPTITE NO. 10-32 x 4"	Service part / kit
24940	8-32 x %" TAPTITE 25 77052 2 LUG .25-TAB #10-SCRW	Service part / kit
26925	PIPE PLUG-3/8" 48 C3396C 1 CRANKCASE SUB ASSEMBLY	Service part / kit
2717A	GROMMET, RUBBER	Service part / kit
27628	HEX NUT-3/8"-16 POSITION	Service part / kit
29289	SCROLL, FLYWHEEL	Service part / kit
31580	PIPE NIPPLE, 3/8" x 8.5" LG. 52 40976 2 M8- 1.25 x 20 SOCKET HEAD	Service part / kit
3163H	8KW ROTOR ASSEMBLY 13 75215 2 SPRING CENTERING WASHER	Service part / kit
31971	BALL BEARING	Service part / kit
32300	HOLDER, FUSE 39 51716 4 M5-0.8 HEX NUT	Service part / kit
33873	Manual-off-auto switch	Service part / kit
3590A	FUSE, 5A 600 VOLT	Service part / kit
36932	SCREW, PAN HEAD	Service part / kit
38353	RUBBER MOUNT 24 23152 4 3/8"-16 x 3/4" HEX HEAD BOLT	Service part / kit
40213	PCB SUPPORT, SNAP-IN 34 22473 1 M6 FLAT WASHER	Service part / kit
40976	SOCKET HD. CAPSCR., M8	Service part / kit
42568	CAPSCREW, HEX HD. - M6-1.0 X 20MM	Service part / kit
43181	M3-0.5 x 10 PAN HEAD 50 38150 6 M4 FLAT WASHER	Service part / kit
43182	M3 LOCK WASHER 49 75475 4 M4 x 0.7 x 10 PMMS	Service part / kit
45756	M6-1.0 x 10 TAPTITE 40 89280D 1 OIL SUMP ASSEMBLY	Service part / kit
48850	TERMINAL BLOCK-5	Service part / kit
51715	M4-0.7 HEX NUT 46 A9992C 1 INSULATING PLATE	Service part / kit
52108	Muffler	Service part / kit
5224G	ENGINE PULLEY, 8 KW 23 22237 4 3/8" LOCK WASHER	Service part / kit
53623	2.5A Circuit Breaker	Service part / kit
54502	3A Circuit Breaker	Service part / kit
56893	10-24 x %" CRIMPTITE	Service part / kit
57073	NEUTRAL LUG-JUNCTION 29 = 73591 2 FUSE HOLDER	Service part / kit
57821	CAPSCR., HEX HD.-M8-1.25	Service part / kit
59637	SCREW, TAPTITE 3/8"-16 x	Service part / kit
62684	LUG, GROUND 27 = C2261 1 COVER	Service part / kit
64113	WING NUT, M6-1.0	Service part / kit
64182	M6-1.0 x 16 SOCKET HEAD	Service part / kit
65795	Battery Charge Rectifier	Service part / kit
66849	C2094	Service part / kit
71978	CONNECTING ROD WITH CAP 32 A5776 1 PRESSURE RELIEF BALL	Service part / kit
71980	PISTON PIN 34 78645 1 GOVERNOR RETAINER	Service part / kit
71983	PISTON PIN RETAINER	Service part / kit
723798	6/8BKW UPPER BEARING 16 45771 4 M8 NUT	Service part / kit
72379B	6/8KW UPPER BEARING SCREW (10KW)	Service part / kit
72694	PIVOT BALL STUD	Service part / kit
72696	JAM NUT (ROCKER ARM)	Service part / kit
73146	6/8BKW NYLON SLIDES 21 22145 2 M8 FLAT WASHER	Service part / kit
73159	BALL BEARING	Service part / kit
73591	FUSE HOLDER	Service part / kit
74908	M5-0.8 x 10 TAPTITE 22 36932 6 SCREW, PAN HEAD	Service part / kit
74975	ENCLOSURE COVER 19 22131 1 FLAT WASHER-3/8"	Service part / kit
75210A	TERMINAL BLOCK . 33 A2053 1 M6-1.0 x 65 HEX HEAD	Service part / kit
75211	REGULATOR, GAS FUEL	Service part / kit
75214	GAS REGULATOR	Service part / kit
75224D	ENGINE PULLEY 22 22131 5 3/8" FLAT WASHER	Service part / kit
75234	RESISTER, 1 OHM 25W 42 A9947B 1 45A CIRCUIT BREAKER (10KW)	Service part / kit
75235	M5-0.8 x 30 HEX HD. 56 31879 2 #4 FLAT WASHER	Service part / kit
75476	M4-0.7 x 16 PHILLIPS 43 A9992A 8 TERMINAL BLOCK	Service part / kit
75995	6/8BKW LOWER BEARING 10 75242 4 ALTERNATOR MOUNTING	Service part / kit
76361	THRUST WASHER	Service part / kit
77006	8/10 KW STATOR BOLT 19 66386 1 BRUSH HOLDER ASSEMBLY	Service part / kit
77033	SOLDERLESS LUG	Service part / kit
77158	OIL SCREEN PICKUP ASSEMBLY	Service part / kit
77441	MANUAL TRANSFER HANDLE	Service part / kit
78645	GOVERNOR RETAINER (C-RING)	Service part / kit
78658	GOVERNOR ARM "R" PIN	Service part / kit
78659	THRUST WASHER	Service part / kit
78691	COVER, OIL PRESSURE	Service part / kit
78694	PUSH ROD GUIDE PLATE	Service part / kit
79246	M6- 1.0 x 16 HEX HD. & LOCK	Service part / kit
80077	M4-0.7 x 20 PHILLIPS 47 A9872 1 DIN RAIL	Service part / kit
80309	BREATHER COVER 43 78659 2 THRUST WASHER	Service part / kit
80338	OIL BREATHER SEPARATOR	Service part / kit
83048	ASSEMBLY, POTTED REGULATOR	Service part / kit
83512	TAPTITE-M8-1.25 x 15 LG CRANK TO CARB.	Service part / kit
83897	TAPPET, SOLID 49 84430 1 BALANCER	Service part / kit
83907	ROCKER ARM 54 90747 1 BREATHER VALVE ASSEMBLY	Service part / kit
83921	BEARING TUBE SHAFT	Service part / kit
843181	M3-0.5 x 10 PAN HEAD 50 =. 38150 6 M4 FLAT WASHER	Service part / kit
86002	OUTER GEROTOR	Service part / kit
86026	INNER GEROTOR	Service part / kit
86514	VALVE SPRING RETAINER	Service part / kit
86515	VALVE SPRING KEEPER SCREW. AND LOCK WASHER	Service part / kit
86516	EXHAUST VALVE	Service part / kit
86517	INTAKE VALVE	Service part / kit
87798	Start/Stop Switch	Service part / kit
89473	Bimetal Choke Assembly	Service part / kit
89673	WASHER, VALVE SPRING	Service part / kit
89685	GROMMET, RUBBER	Service part / kit
90144	C/BREAKER 20A.	Service part / kit
90145	30A Circuit Breaker (all units); 30A Circuit Breaker Q-70G	Service part / kit
90747	BREATHER VALVE ASSEMBLY	Service part / kit
91188A	Carburetor	Service part / kit
91306	Choke Solenoid	Service part / kit
91308	VALVE SPRING	Service part / kit
91646	DEFLECTOR, EXHAUST 36 91159 1 BUSHING, RUBBER	Service part / kit
92079	SCREW, TAPTITE M6-1.0 x	Service part / kit
92113	dk a_i Dh ok	Service part / kit
92164	GOV. SPRING -ADJUSTMENT	Service part / kit
92362	ROCKER COVER W/FILL	Service part / kit
92572	ASSEMBLY, IGNITION COIL	Service part / kit
92675A	Exhaust Muffler	Service part / kit
9280D	OIL SUMP ASSEMBLY	Service part / kit
93064	OIL FILL CAP ASSEMBLY	Service part / kit
94039	CONTROLLER P.C.B.	Service part / kit
95685	CLAMP, #28 56 C1863 1 BAFFLE	Service part / kit
956893	CRIMPTITE-#10-24 x 1/2" LG 15LG	Service part / kit
96290	STUD, CARB. MOUNT M6-1.0 x BELLCRANK	Service part / kit
96699	PISTON	Service part / kit
9673J	SRV C3677 1	Service part / kit
A1442	FLANGED HEX HD. CAP- 35 78691 4 COVER, OIL PRESSURE	Service part / kit
A1495	M4-0.7 x 10 TAPTITE 55 C1226 1 HARNESS (NOT SHOWN)	Service part / kit
A1658	WASHER % SHAKEPROOF 23 =77033 6 SOLDERLESS LUG	Service part / kit
A1801	ASSEMBLY, ENGINE BATTERY 28 51714 4 M3-0.5 HEX NUT	Service part / kit
A2311	%4"-20 x 1" FASTENER	Service part / kit
A2393	M6 1.0 x 16 FLAT SOCKET HD.	Service part / kit
A2666	SOLENOID, GAS FUEL	Service part / kit
A2769	LUG, GROUND 8-TABS A9947A 1 35A CIRCUIT BREAKER (8KW)	Service part / kit
A4323	SCROLL, FLYWHEEL 28 38593 1 BRASS STREET ELBOW	Service part / kit
A4456	3/8" SPECIAL LOCK	Service part / kit
A5358	OIL ADAPTOR	Service part / kit
A5649H	6KW ROTOR ASSEMBLY 12 52858 10 FLANGED LOCKING NUT	Service part / kit
A5771	OIL PRESSURE SPRING	Service part / kit
A5776	PRESSURE RELIEF BALL	Service part / kit
A6239	ASSEMBLY, CHOKE SOLENOID	Service part / kit
A6529	6 KW STATOR BOLT C1696 1 10KW ALTERNATOR COVER	Service part / kit
A6532	MANIFOLD, INTAKE 21 91916 1 LEVER, GOVERNOR ARM	Service part / kit

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

Common questions

What is the oil capacity of the Generac GN-410?

The Generac GN-410 engine has an oil capacity of 1.4 liters.

What is the displacement of the Generac GN-410?

The Generac GN-410 has a displacement of 0.407 liters with 1 cylinders.

Which generators use the Generac GN-410 engine?

The Generac GN-410 powers 5 generator set(s), including Generac C9035, Generac C9036, Generac NP-50G, Generac PRIMEPACT 50, Generac PrimePact 50 LP.

How often should you change the oil in the Generac GN-410?

The Generac GN-410 oil change interval is every 100 hours.

What is a common problem with the Generac GN-410 engine?

A commonly reported issue on generators using the Generac GN-410 is: The engine will not crank.. Cause: 1. Fuse blown 2. Loose, corroded or defective battery cables 3. Defective engine Start/Stop switch 4. Defective starter contactor 5. Defective starter motor 6. Low or defective battery. Fix: 1. Replace fuse. 2. Tighten, clean or replace battery cables as necessary. 3. Replace Start/Stop switch. 4. Replace contactor. 5. Replace starter motor. 6. Charge or replace battery..