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Generac QT 3.9L 40kW Generator Set

The Generac QT 3.9L 40kW is a 40 kW Natural Gas, Propane Vapor standby generator set powered by a Generac V-type engine. It is available at 120/240 V, 120/208 V and 277/480 V, single-phase and 60 Hz. It holds about 3.8 L (1.0 gal) of oil and 4 L (1.1 gal) of coolant, with a maximum ambient rating of 50 °C. Starting uses group-24 battery rated 525 CCA at 12 V.

40 kW
Standby
3.9 L
Displacement
3.8 L
Oil capacity
1
Document types

How to read your Generac serial & model number →

Typical fuel consumption for 40–45 kW Bi-Fuel (NG/LP) generators →

Compare with other 40–45 kW Bi-Fuel (NG/LP) generators →

Service parts for the QT 3.9L 40kW

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

Air intake

1 required

Oil system

1 required
0E7415Oil filter$3.59NAPA

Belts

1 required

Cooling system

1 required

Electrical

1 required
058208Batterysee priceAmazon

Ignition

1 required

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

Specifications

FuelNatural Gas, Propane Vapor
Frequency60.0 Hz
Standby power40 kW
ControllerR-100
Oil capacity3.8 L
Voltage options120/240 V, 120/208 V, 277/480 V
Phase1-phase or 3-phase
Power factor1.0 (single-phase), 0.8 (three-phase)
Battery group24F
Battery cranking525 CCA
Battery voltage12 Volts V
Max ambient50 °C

Engine

Generac V-type
Oil capacity3.8 L
Coolant capacity4.0 L
Displacement3.9 L
AspirationNaturally Aspirated
Rated speed1800 rpm

Maintenance & consumables

for the Generac V-type
ItemSpecCapacityPart #Interval
Air filterAir Cleaner0A4637500 hr Amazon eBay $49.95 NAPA $13.61
Fuel filter—1000 hr
Oil filter0E7415150 hr Amazon eBay $81.99 NAPA $3.59
BatteryBCI Group 24F-6, 535 CCA @ 0 deg. F (spec sheet recommends 24F 525CCA)058208 Amazon eBay
Belt60.5"0D3488H Amazon eBay $49.99
CoolantHalf low silicate ethylene glycol base anti-freeze and deionized water (50-50 mixture)046627 Amazon eBay $15.00
Coolant filter—1000 hr
OilEngine crankcase oil level—1000 hr
Spark plugGap 1.01 mm (0.040 inch); Champion # RC12LC4RC12LC4 Amazon eBay $26.61

Service intervals

29
ItemActionHoursMonthsNotes
Unit (Service Schedule Level 1)Inspect10 hr1 moRecommended: monthly / 10 hrs
Engine Oil LevelCheck20 hrAt least every 20 hours of operation, or prior to use
Engine oil level / crankcase oilCheck20 hrCheck at least every 20 hours of operation, or prior to use
Engine oil (break-in oil)Change30 hrFirst service — Engine shipped with break-in oil; change after 30 hours of operation
Unit (Service Schedule Level 2 break-in)Inspect30 hr3 moFirst service — Wear-in inspection performed ONLY ONCE following first three months or first 30 hours
Unit (Service Schedule Level 3)Inspect50 hr6 moSemi-annually or following each 50 hours
Engine oil and oil filterChange150 hr6 moFirst service — First 100 operating hours; after initial change service at 150 operating hours or 6 months, whichever comes first
Unit (Service Schedule Level 4)Inspect100 hr12 moAnnually or following each 100 hours
Unit (Service Schedule Level 5)Inspect250 hr24 moAnnually or following each 250 hours
Air cleanerCheck500 hrEVERY 500 OPERATING HOURS - service air cleaner
Air cleanerOther500 hrEvery 500 operating hours: service air cleaner
Engine DC alternatorCheck500 hrEvery 500 operating hours
StarterCheck500 hrEvery 500 operating hours
Battery state of charge and conditionCheck3 moMaintenance performed by authorized service facilities
Cooling systemDrain12 moOnce annually flush cooling system
Cooling systemInspect1 moInspect at least once each month; check hoses and clamps
Cooling systemOther12 moOnce annually: flush cooling system / drain, flush and refill
Engine Cooling SystemInspect1 moAt least once each month; check hoses and hose clamps
Engine governorTest12 moOnce annually; adjust or repair if needed
Engine ignition systemCheck3 moEvery three months
Engine safety devices (low oil pressure, low coolant level, high coolant temperature)Test6 moOnce every six months
Engine-generator (visual)Inspect1 moComplete a thorough visual inspection monthly
Engine-generator visual inspectionInspect1 moMonthly: check for damage, loose/corroded fasteners, fuel/oil/coolant leaks
Exhaust systemInspect3 moInspect at least once every three months; check pipes, mufflers, clamps
Fan beltsCheck3 moInspect every three months; replace defective belt; check tension (3/8 to 5/8 inch deflection)
Fuel systemInspect3 moInspect and test fuel system
Fuel systemTest3 moEvery three months: inspect and test fuel system
GeneratorClean12 moOnce annually: clean and inspect generator; check stator/rotor insulation resistance
Transfer switchCheck3 moEvery three months

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

32
TypeItemValueUnitCondition
ClearanceFan belt deflection (force of approx. 22 pounds / 10 kg applied midway between pulleys)3/8 to 5/8inch (10 to 16 mm)midway between pulleys
GapSpark plug gap1.01mm (0.040 inch)
GapSpark plug gap1.01 mm (0.040 inch)mm (inch)
OtherAltitude deration1% for every 100 m above 183 m; 3% for every 1000 ft above 600 ft
OtherCoolant capacity3.0U.S. gal
OtherCrankcase oil capacity4U.S. qts (3.8 liters)
OtherFan belt tension (thumb pressure)deflect about 3/8 to 5/8 inchinchMidway between pulleys
OtherFan belt tension/deflection (force applied midway between pulleys)22 pounds (10 kg) force deflects belt about 3/8- to 5/8-inch (10 to 16 mm)pounds (kg) / inch (mm)Applied midway between pulleys
OtherGenerator locked rotor kVA available @ 35% voltage dip80KVAsingle-phase or 208V, 3-phase
OtherGenerator locked rotor kVA available @ 35% voltage dip90KVA480V, 3-phase
OtherTelephone interference factor (TIF)< 50
OtherTotal harmonic distortion< 3.5%
PressureCompression ratio9.1-to-1
PressureGas pressure at inlet to fuel shutoff solenoid (must not exceed)14inches water column (0.5 psi)
PressureLow oil pressure switch setpoint8psi
PressureLow oil pressure switch setting8psicontacts close below this pressure
PressureOperating fuel pressure (natural gas and propane vapor)5 to 14in. water column (0.18 to 0.5 psi)
PressureOptimum pressure at fuel shutoff solenoid11inches water column (0.4 psi)
PressureRequired fuel pressure (natural gas / liquid propane)5 inches to 14 inches water column (0.18 to 0.5 psi)inches water column (psi)
SpeedFan speed2060rpm
SpeedGovernor steady state regulation± 0.25%isochronous
SpeedRated synchronous RPM1800rpm60 Hz
TemperatureExhaust temperature at rated output938°F60 Hz rated output
TemperatureHigh coolant temperature switch setting140°C (284°F)
TemperatureHigh coolant temperature switch trip pointapproximately 140°C (284° F)
TemperatureMaximum ambient temperature50°C (140°F)
TemperatureMaximum operating air temp. on radiator60°C (150°F)
TemperatureTemperature deration3% for every 10°C above 25°C; 1.65% for every 10°F above 77°F
VoltageBattery charge alternator12V, 30Amp
VoltageStatic battery charger2Amp
VoltageSystem voltage12Volts
VoltageVoltage regulator regulation± 1%single-phase sensing

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
Coolant50-50 mixture of low silicate ethylene glycol base anti-freeze and deionized water3.0 U.S. galDo not use chromate base rust inhibitor; high silicate boosters or soluble oil inhibitor not recommended
CoolantHalf low silicate ethylene glycol base anti-freeze and deionized water (50-50 mixture)Low silicate anti-freeze; deionized water; high quality rust inhibitor optional3.0 U.S. gal.Do not use chromate base rust inhibitor, high silicate anti-freeze boosters or soluble oil inhibitors
Engine oil15W-40High-quality detergent oil classified "For Service CC, SD, SE, SF"4.0 U.S. qts (3.8 liters)Factory fill is 15W-40
Engine oil5W-30 syntheticbelow 0°CFor temperatures below 32°F (0°C); optional Cold Weather Start Kit recommended
Engine oilSAE 20W-20 or 15W-40For Service SJ or SH0°C to 27°C32° to 80°F (0° to 27°C)
Engine oilSAE 30W or 15W-40For Service SJ or SHabove 27°C4.0 U.S. quartsAbove 80°F (27°C) use SAE 30W or 15W-40 (older manual); unit filled with 15W-40 at factory (newer manual: 5W-20, use 5W-30 on change)
FuelLP gas (Btu content at least 2,520 Btus per cubic foot)Required fuel pressure 5 to 14 inches water column
FuelNatural gas (Btu content at least 1,000 Btus per cubic foot)Required fuel pressure 5 to 14 inches water column
FuelNatural gas (min. 1,000 Btu per cubic foot) or LP gas (min. 2,520 Btu per cubic foot)Fuel pressure 5 in. - 14 in. water column
Gear oilSAE 90 gear lubricantGenerator gearbox (if equipped)

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
Reconfiguring the Fuel System (NG to LP) adjustment

⚠ Port 1 is for NG only and Port 2 is for LP vapor only. No provision for dual fuel has been made.

  1. Turn the main gas supply off.
  2. Remove the carburetor fuel hose from the outlet port (Port 1) of the demand regulator.
  3. Remove the brass hose fitting from the outlet port (Port 1).
  4. Remove pipe plug from Port 2.
  5. Install brass hose fitting into Port 2.
  6. Install pipe plug into Port 1.
  7. Connect carburetor gas hose to brass fitting.
  8. Tighten all clamps and plugs.
  9. Make sure fuel supply is of the proper pressure and type for configuration.
  10. Reverse the procedure to convert back to natural gas.
  11. The Dip switch inside the control panel must be in the LP or NG position when switching to different fuels.
Spark Plugs - Inspection and Gap Adjustment adjustment

Tools: wire feeler gauge, wire brush

  1. Clean area around base of the spark plugs using a wire brush and commercial solvent; do not blast the plugs.
  2. Remove the spark plugs and check condition; replace if worn or reuse is questionable.
  3. Check spark plug gap using a wire feeler gauge.
  4. Adjust gap to 1.01 mm (0.040 inch) by carefully bending the ground electrode.
Preparation for Start-Up installation

⚠ Ensure AUTO/OFF/MANUAL switch is in OFF position before working on the generator.

Tools: Manometer

  1. Ensure 120VAC circuit breaker to battery charger is open.
  2. Remove the fuse from the control panel (H-100/R-series: 15 Amp ATO fuse).
  3. Connect battery cables; attach negative cable last.
  4. Close 120VAC circuit breaker to the battery charger.
  5. Insert the fuse into the control panel.
  6. Move AUTO/OFF/MANUAL switch to MANUAL; engine should crank and start.
  7. Check voltage at generator terminals and check for leaks.
  8. Close generator main line circuit breaker; turn generator set off.
Preparation for Start-Up / Start-Up Checklist installation

⚠ Do not crank the engine continuously for longer than 30 seconds or the starter motor may be damaged.

Tools: manometer

  1. Ensure the 120VAC circuit breaker to the battery charger is open.
  2. Remove the 15 Amp ATO fuse from the control panel (H-100 and R-100: lower left-hand corner of control box).
  3. Connect the battery cables to the battery; attach negative cable last.
  4. Close the 120VAC circuit breaker to the battery charger.
  5. Measure the voltage at the battery before and after the charger is turned on.
  6. Verify all AC electrical connections are tight at the circuit breaker and transfer switch.
  7. Visually inspect entire area for loose paper, plastic wrappings, leaves, etc.
  8. Check all hose clamps and fittings for leaks or damage.
  9. Check all electrical plugs; ensure each is seated correctly.
  10. Verify the AUTO/OFF/MANUAL switch is in OFF position.
  11. Open the valve to the engine fuel line and bleed the fuel system of air.
  12. Open the generator main line circuit breaker.
  13. Connect a manometer to the gas line and record static pressure.
  14. Insert the fuse into the control panel and move the AUTO/OFF/MANUAL switch to MANUAL; engine should crank and start.
Reconfigure the Fuel System (NG to LP) installation

⚠ Make sure fuel supply is of proper pressure and type for configuration.

⚠ Keep ports free from debris during reconfiguration.

Tools: Pipe sealant

  1. Turn the main gas supply off.
  2. Remove carburetor fuel hose from outlet Port 1 of demand regulator.
  3. Remove brass hose fitting from Port 1.
  4. Remove pipe plug from Port 2.
  5. Install brass hose fitting into Port 2.
  6. Install pipe plug into Port 1.
  7. Connect carburetor gas hose to brass fitting; tighten all clamps and plugs.
  8. Set the Dip switch inside the control panel to LP or NG position.
Battery Inspection and Maintenance maintenance

⚠ DO NOT use jumper cables and a booster battery to crank or start the generator engine.

⚠ Storage batteries give off explosive hydrogen gas.

⚠ Battery electrolyte fluid is an extremely caustic sulfuric acid solution.

Tools: automotive-type battery hydrometer

  1. Inspect the battery posts and cables for tightness and corrosion. Tighten and clean as necessary.
  2. Check battery fluid level of unsealed batteries; if necessary fill with DISTILLED WATER ONLY.
  3. Have the state of charge and condition checked with an automotive-type battery hydrometer.
Battery Maintenance maintenance

⚠ Do not use tap water in batteries.

⚠ Storage batteries give off explosive hydrogen gas.

⚠ Do not use jumper cables or a booster battery to crank the engine.

Tools: Automotive-type battery hydrometer

  1. Inspect battery posts and cables for tightness and corrosion; tighten and clean as necessary.
  2. Check battery fluid level of unsealed batteries; fill with DISTILLED WATER only if necessary.
  3. Have state of charge and condition checked with an automotive-type battery hydrometer.
Battery Replacement maintenance

⚠ Be sure the AUTO/OFF/MANUAL switch is set to the OFF position before connecting the battery cables.

⚠ Be sure the 120VAC power supply to the battery is turned OFF, or sparking may occur at the battery posts.

  1. When replacing batteries, use the same number and type of battery as follows: BCI Group No. 24F-6, 535 CCA at 0 deg. F.
  2. The BCI number should be located directly on the battery.
Changing Engine Oil maintenance

⚠ Never operate engine with oil below the dipstick ADD mark.

⚠ Do not overtighten the oil filter.

Tools: Suitable container, Clean, lint-free cloth

  1. Remove OIL DRAIN HOSE from its retaining clip.
  2. Loosen and remove OIL DRAIN HOSE CAP; drain oil completely into suitable container.
  3. Install and tighten OIL DRAIN HOSE CAP; re-install into retaining clip.
  4. Turn OIL FILTER counterclockwise and remove; dispose of old filter.
  5. Apply light coating of new engine oil to seal of new filter; install and tighten by hand only.
  6. Remove OIL FILL CAP; add recommended oil. Do not fill above dipstick FULL mark.
  7. Start engine and check for oil leaks.
Changing the Engine Air Cleaner maintenance
  1. Remove the air cleaner cover.
  2. Replace the air filter, making sure it is positioned properly.
  3. Reattach the cover.
Check Engine Oil Level maintenance

⚠ Any attempt to crank or start the engine before it has been properly serviced with the recommended oil may result in an engine failure.

  1. Remove oil dipstick and wipe dry with a clean, lint-free cloth.
  2. Install oil dipstick, then remove again.
  3. Oil should be between FULL and ADD marks.
  4. If below ADD mark, remove oil fill cap and add recommended oil to FULL mark.
  5. DO NOT FILL ABOVE THE "FULL" MARK.
Spark Plugs - Inspect and Set Gap maintenance

⚠ Do not blast the spark plugs to clean.

Tools: Wire feeler gauge, Wire brush, Commercial solvent

  1. Clean area around base of spark plugs to keep dirt out.
  2. Remove spark plugs and check condition; replace if worn or reuse questionable.
  3. Check gap with a wire feeler gauge; adjust by carefully bending ground electrode.

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

VoltagePhaseConnectionLeadsNotes
120/208V3Stator power winding connections - 3-phase, 120/208V (6 Lead), "Y" configuration6 leadRated voltage L-L 208V; L-N 120V.
120/208V3-phaseY configuration (6 lead)6-lead (S1-S6; E1-E3)Rated voltage between circuit breaker terminals E1-E2, E1-E3, E2-E3 is 208V; between each terminal and neutral point 00 is 120V
120/240V1Four-lead, single-phase stator - voltage code "A" (240V, 1-phase, 60 Hz)4-leadRated voltage between each circuit breaker terminal is 240V; rated voltage between each circuit breaker terminal and the neutral point 00 is 120V.
240V1-phaseFour-lead, single-phase stator (voltage code A)4-leadRated voltage between each circuit breaker terminal is 240V; between each terminal and neutral point 00 is 120V
277/480V3Stator power winding connections - 3-phase, 277/480V (6 Lead), "Y" configuration6 leadRated voltage between circuit breaker terminals E1-E2, E1-E3 and E2-E3 is 480V; between each terminal and neutral point 00 is 277V.
277/480V3-phaseY configuration (6 lead)6-lead (S1-S6; E1-E3)Rated voltage between circuit breaker terminals E1-E2, E1-E3, E2-E3 is 480V; between each terminal and neutral point 00 is 277V

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 Generac QT 3.9L 40kW?

The Generac QT 3.9L 40kW is rated 40 kW standby.

What engine does the Generac QT 3.9L 40kW use?

The Generac QT 3.9L 40kW is powered by the Generac V-type engine.

What fuel type does the Generac QT 3.9L 40kW take?

The Generac QT 3.9L 40kW runs on Natural Gas, Propane Vapor.

What is the oil capacity of the Generac QT 3.9L 40kW?

The Generac V-type engine in the Generac QT 3.9L 40kW has an oil capacity of 3.8 liters.

What is the coolant capacity of the Generac QT 3.9L 40kW?

The Generac QT 3.9L 40kW cooling system holds 4 liters (1.1 US gallons) for the engine, per the manufacturer specification sheet.

What voltages is the Generac QT 3.9L 40kW available in?

The Generac QT 3.9L 40kW is offered in 120/240 V, 120/208 V, 277/480 V, 1-phase or 3-phase-phase.

What battery does the Generac QT 3.9L 40kW use?

The Generac QT 3.9L 40kW uses 12 Volts V each, 525 CCA, group 24F, per the manufacturer specification sheet.

What oil filter fits the Generac QT 3.9L 40kW?

The Generac QT 3.9L 40kW uses oil filter part number 0E7415.

What air filter fits the Generac QT 3.9L 40kW?

The Generac QT 3.9L 40kW uses air filter part number 0A4637.

Troubleshooting

7

Fault codes

CodeMeaning
Safety 001DANGER

Symptoms & remedies

SymptomCauseRemedy
Engine won’t crank.1. 15 amp fuse blown. 2. Loose or corroded or defective battery cables. 3. Defective starter contactor. 4. Defective starter motor. 5. Dead or Defective Battery. 6. 5 amp fuse blown.1. Replace fuse. 2. Tighten, clean or replace battery cables as necessary. 3. Replace contactor.* 4. Replace starter motor.* 5. Remove, change or replace battery. 6. Replace fuse.*
Engine cranks but won't start1. Out of fuel. 2. Fuel solenoid (FS) is defective 3. Open Wire #14A from Engine Control circuit board. 4. Spark plugs defective. 5. Door on tank not closed.1. Replenish fuel. 2. Replace solenoid.* 3. Reconnect wire. 4. Clean, regap or replace plugs. 5. Close door on tank.
Engine starts hard, runs rough.1. Flame arrestor (air cleaner) plugged or damaged. 2. Plugged fuel line. 3. Defective spark plugs. 4. Fuel pressure incorrect.1. Clean or replace as needed. 2. Unclog fuel line. 3. Clean, regap or replace plugs. 4. Confirm fuel pressure to regulator is as recommended in SPECIFICATIONS.
Engine starts then shuts down.AUTO/OFF/MANUAL Switch at OFF, engine continues to run*Contact the nearest Authorized Dealer for assistance.
No AC output from generator.Defective Control Module circuit board*Contact the nearest Authorized Dealer for assistance.
Defective AUTO/OFF/MANUAL switch.1. Open/disconnected wire #15A between AUTO/OFF/MANUAL switch and Control Module circuit board.Replace switch.* Reconnect/close wire.

Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.

Parts

250
Part #DescriptionQtySystem
027175LUBE GREASE SAE #90 80W90 (NOT SHOWN).200 GALFluid eBay
029032HOSE 9/32 ID (43"LG)1Hose Amazon eBay
035606SENSOR HI COOLANT SHUTDOWN1Sensor Amazon eBay
035685CLAMP HOSE #28 1.32-2.252Hose Amazon eBay
040105HOSE COOL 2 IN ID 20R41Hose Amazon eBay
042561CLAMP HOSE #36 1.88-2.752Hose Amazon eBay
044149GASKET EXHAUST RING1Gasket Amazon eBay
047290HOSE 3/8 ID SINGLE BRAID (16” LG)1Hose Amazon eBay $10.00
048031CCLAMP HOSE BAND 1/42Hose Amazon eBay $1.00
048031JCLAMP HOSE BAND .631Hose Amazon eBay
052223HOSE 1/2 ID SAE-30R2 FUEL/OIL (14"LG)1Hose eBay
057822CLAMP HOSE #8 .53-1.002Hose Amazon eBay
057823CLAMP HOSE #10 .56-1.062Hose Amazon eBay
057824CLAMP HOSE #16 .87 - 1.501Hose Amazon eBay
059057HOSE 3/4 ID SAE-30R21Hose Amazon eBay
059193CHOSE 5/8 ID X 31.0" LG1Hose Amazon eBay
059194HOSE 5/8 ID LPG & NG (24" LG)1Hose Amazon eBay $12.00
064945GASKET CARB ADAPTOR1Gasket Amazon eBay
065386HOSE COOL 5/8 ID 100R6 (15"LG)1Hose eBay
067680ASSY VOLTAGE REGULATOR 60HZ1Avr Amazon eBay $245.48 NAPA $19.32
069860EHOSE DRAIN ASSY 28"1Hose Amazon eBay
077879HOSE VACUUM 5/321Hose buy
095613SEAL OIL1Seal eBay
095971SEAL OIL1Seal eBay
0A4637Air Cleaner1Air filter Amazon eBay $49.95 NAPA $13.61
0A6283HOSE PREFORMED BLOCK HEATER1Hose eBay
0A6751SW-TMP 245 DEG 3/8 NPT1Sensor Amazon eBay $49.75
0A6765RING GASKET 2.5 DIA2Gasket eBay
0A8584Switch1Sensor Amazon eBay $19.57 FridayParts $31.60
0C7649CLAMP HOSE .38-.871Hose Amazon eBay
0C8127ELEMENT AIR CLEANER1Air filter Amazon eBay $15.99 NAPA $24.03 FridayParts $21.87
0D2244MASSY MAGPICKUP (3/8-24 MALE)1Sensor Amazon eBay $127.65 FridayParts $18.08
0D2698GASKET ADAPTER THROT BODY1Gasket eBay
0D3488BELT SERPENTINE (67.16" LG) (3000 RPM)1Belt Amazon eBay $55.43
0D3488BBELT SERPENTINE 40.85" LG (3600 RPM)1Belt Amazon eBay $48.54
0D3488FBELT SERPENTINE 38.35" LG (1800 RPM)1Belt Amazon eBay
0D3488GBELT SERPENTINE (65.0" LG) (1800 RPM)1Belt Amazon eBay $65.54
0D3488HSERPENTINE BELT (60.5")1Belt Amazon eBay $49.99
0D3488JBELT SERPENTINE (65.3" LG) (2300 RPM)1Belt Amazon eBay $50.38
0D3488KSERPENTINE BELT (68.3" LG) (3600 RPM)1Belt Amazon eBay $47.35
0D3488RBELT SERPENTINE 54.72"1Belt eBay
0D4255GASKET EXHAUST MANIFOLD2Gasket Amazon eBay
0D5418STARTER MOTOR FORD V-10 ENGINE1Starter Amazon eBay FridayParts $160.99
0D5419OIL FILTER, FORD V-10 ENGINE1Oil filter Amazon eBay $16.80 NAPA $9.09
0D8030TENSIONER ENG. AUTOMATIC BELT1Belt eBay $242.00
0E0502TEMPERATURE SENDER DELPHI1Sensor Amazon eBay $39.79
0E0561ASSY WATER LEVEL SENSOR C/E PL1Sensor Amazon eBay
0E0992BPLUG EXPANSION 21/32" O.D. (WATER PUMP)Pump Amazon eBay
0E2507PROBE COOLANT LEVEL 3/8 NPTF1Sensor Amazon eBay $90.00 FridayParts $16.24
0E4390GASKET GOVERNOR ACTUATOR1Gasket eBay $417.99
0E5968GASKET EXTRUDED TRIM (328” LG)1Gasket Amazon eBay $26.58
0E6586GASKET BOSCH 32 & 401Gasket Amazon eBay $385.00
0E6729STARTER 12V1Starter Amazon eBay $145.00 NAPA $154.59
0E7080OIL FILTER 3.0L FORD1Oil filter Amazon eBay $30.00 NAPA $12.22 KuduParts $13.00 FridayParts $15.00
0E7121O-RING 47.625 ID X 2.38 WIDTH1Seal Amazon eBay
0E7163GASKET EXHAUST 3.0L FORD2Gasket eBay
0E7415Oil Filter1Oil filter Amazon eBay $81.99 NAPA $3.59
0E7702HOLD DOWN AIR CLEANER1Air filter Amazon eBay
0E7841GASKET THERMOSTAT ADAPTOR2Gasket Amazon eBay $4.26
0E9868AALTERNATOR DC W/OUT PULLEY1Alternator Amazon eBay $467.90
0F2097GASKET 390 GEARBOX1Gasket eBay
0F2256ASSY PCB PWR AVR W/AMP HEADER1Avr eBay $200.00
0F2686HOSE RADIATOR UPPER CPL1Hose Amazon eBay $65.00
0F2843GASKET THERMOSTAT HOUSING G31Gasket Amazon eBay
0F3158OIL COOLER FORD (150KW 3600RPM)1Oil cooler eBay
0F3216PULLEY 80 OD DC ALTERNATOR (1800 RPM)1Pulley Amazon eBay
0F3216CPULLEY 132 OD DC ALTERNATOR (3000 RPM)1Pulley Amazon eBay
0F3228HOSE LOWER RAD CPL C2 3.0L1Hose eBay
0F3446BRKT R/H SIDE D.C. ALTERNATOR1Alternator Amazon eBay
0F3447BRKT L/H SIDE D.C. ALTERNATOR1Alternator Amazon eBay
0F3869SWITCH PRESSURE GAS 5" RISE (INCLUDED WITH I/N 3 REGULATOR ASSEMBLY)1Sensor Amazon eBay $74.99
0F4269GASKET MIXER BODY1Gasket Amazon eBay
0F4301HOSE OIL COOLER (150KW 3600RPM)1Hose eBay
0F4413HOSE UPPER RAD CPL C2 3.9L1Hose Amazon eBay
0F4414HOSE LOWER RAD CPL C2 3.9L1Hose Amazon eBay
0F4612SENDER OIL PRESSURE 1/8" NPT1Sensor Amazon eBay $189.99
0F5253V-BELT 31/64" X 61-3/8" (5.4L 100KW ONLY)1Belt Amazon eBay
0F5254V-BELT 31/64" X 62-3/8"1Belt Amazon eBay
0F5418ELEMENT AIR FILTER1Air filter Amazon eBay $38.60 NAPA $13.61
0F5419ELEMENT AIR FILTER1Air filter Amazon eBay $26.99 NAPA $11.24
0F5463HOSE LOWER RAD CPL C5 6.8L1Hose Amazon eBay $24.85
0F6145SEAL WEATHER .45"DIAA/RSeal Amazon eBay
0F6305SEAL COVER 3.18 X 12.7 X 3822Seal Amazon eBay
0F6305ASEAL COVER 3.18 X 12.7 X 2831Seal Amazon eBay
0F6322BOTTOM PLATE, AIR CLEANER 3.9L1Air filter Amazon eBay
0F6323PLATE, AIR CLEANER TOP 3.9L1Air filter Amazon eBay
0F6355GASKET SEAL PLATE 390 GB1Gasket eBay
0F6477ENHANCER GEAR OIL (NOT SHOWN).050 GALFluid eBay
0F6480BRKT L/H SIDE DC ALTERNATOR1Alternator Amazon eBay
0F6631HOSE RADIATOR ENGINE1Hose eBay
0F6761HOSE UPPER RAD CPL C2 3.0L1Hose eBay
0F7077V-BELT 1/2" X 63-3/8" (6.8L, 100KW & 130KW)1Belt Amazon eBay $49.95
0F7874ASSY BRUSH HOLDER 390/HSB1Brush Amazon eBay $79.99
0F9071SENSOR OXYGEN1Sensor buy
0G0321HOSE COOL 5/8" ID 250#WP (14")1Hose Amazon eBay
0G0866HOSE OIL COOLER PREFORMED 3/4 (150KW 3600RPM)1Hose eBay
0G3167O-RING 2-3/4 X 3/32 X 2-15/162Seal Amazon eBay
0G5511GASKET THERMOSTAT 4.2L2Gasket Amazon eBay
0G5515BADAPTER THERMOSTAT 4.6L G31Thermostat buy
0H1827PROBE COOLANT LEVEL 3/8-18NPTF1Sensor Amazon eBay
0H3908HOSE RADIATOR LOWER C5 CPL1Hose buy
0H3909HOSE RADIATOR UPPER C5 CPL1Hose buy
0H4787SPARK PLUG1Spark plug eBay
RC12LC4Spark Plug Champion # RC12LC4Spark plug Amazon eBay $26.61
022097WASHER LOCK M6-1/41Service part / kit Amazon eBay $2.99
022127NUT HEX 1/4-20 STEEL1Service part / kit Amazon eBay
022129WASHER LOCK M8-5/164Service part / kit Amazon eBay
022152WASHER LOCK #101Service part / kit Amazon eBay $12.00
022155WASHER LOCK #66Service part / kit Amazon eBay
022158NUT HEX #10-32 STEEL5Service part / kit Amazon eBay
022237WASHER LOCK 3/81Service part / kit Amazon eBay
022241NUT HEX 3/8-16 STEEL1Service part / kit Amazon eBay
022264WASHER LOCK #8-M42Service part / kit Amazon eBay
022447WASHER SHAKEPROOF INT 1/41Service part / kit Amazon eBay
022473WASHER FLAT 1/4-M6 ZINC1Service part / kit Amazon eBay
023454KEY WOODRUFF #E1Service part / kit Amazon eBay
023484NBUSHING SNAP SB-2.5-311Service part / kit Amazon eBay
023897WASHER FLAT #10 ZINC4Service part / kit Amazon eBay
024114NUT HEX 5/16-24 STEEL1Service part / kit Amazon eBay
024469SCREW HHTT #10-32 X 3/8 CZ1Service part / kit Amazon eBay
025433LUG SLDLSS #6-14 X 13/64 CU1Service part / kit Amazon eBay
026812ELBOW 90D 3/4 NPT2Service part / kit Amazon eBay
026847BREATHER1Service part / kit eBay
026915NIPPLE CLOSE 3/4 X 1.3752Service part / kit Amazon eBay
026925PLUG STD PIPE 3/8 STEEL SQ HD1Service part / kit Amazon eBay
029289TAPE ELEC 1/2 FOAM (AS REQ’D)1Service part / kit Amazon eBay
029673DIO BRIDGE 25A 600V1Service part / kit Amazon eBay $22.99
031919PLUG STD PIPE 3/8 COUNTERSUNK1Service part / kit Amazon eBay
036797BOLT U 5/16-18 X 2.251Service part / kit Amazon eBay
036943SCREW PPHM #10/32 X 22Service part / kit Amazon eBay
037561NUT WING 1/4-20 NYLK1Service part / kit Amazon eBay
038804YCABLE BATT RED #1 X 35.001Service part / kit Amazon eBay
038805HCABLE BATT BLK #1 X 23.001Service part / kit Amazon eBay
040532CB 0100A 3P 240V S BQ3 LL1Service part / kit Amazon eBay
042568SCREW HHC M6-1.0 X 20 G8.82Service part / kit Amazon eBay
043180WASHER FLAT M42Service part / kit Amazon eBay
043790BARBED EL 90 3/8 NPT X 3/81Service part / kit Amazon eBay
044118BARBED STR 1/2 NPT X 5/81Service part / kit Amazon eBay
04576100AQSTUD M14-2.0 X 615 G5 ZINC4Service part / kit Amazon eBay $13.66
04576100BUSTUD M14-2.0 570 G5 ZINC4Service part / kit Amazon eBay
046627CAP RADIATOR1Service part / kit Amazon eBay $15.00
047248BALL BEARING-45 MM1Service part / kit Amazon eBay
047411SCREW HHC M6-1.0 X 16 G8.84Service part / kit Amazon eBay
048467CIRCT BRK 7 X 1 ETA 46-500-P1Service part / kit Amazon eBay
049226WASHER LOCK M56Service part / kit Amazon eBay
049721SCREW HHC M6-1.0 X 35 G8.8 BLK1Service part / kit Amazon eBay
049813NUT HEX M6 X 1.0 G8 YEL CHR1Service part / kit Amazon eBay $3.99
050279DECAL FUEL INLET NG (NATURAL GAS APPLICATION)1Service part / kit Amazon eBay
050280DECAL FUEL INLET LPG (LP VAPOR APPLICATION)1Service part / kit Amazon eBay
050331BATTERY POST COVER BLACK1Service part / kit Amazon eBay
050331ABATTERY POST COVER RED +1Service part / kit Amazon eBay
050873APLUG PIPE 1/4 CSK W/ VIBRA SLService part / kit Amazon eBay
051713WASHER FLAT M52Service part / kit Amazon eBay
052250TAPE FOAM 1 X 1 (26.75” LG)2Service part / kit Amazon eBay FridayParts $16.89
052251DAMPENER VIBRATION 40 BLUE4Service part / kit Amazon eBay
052252DAMPENER VIBRATION4Service part / kit Amazon eBay $19.28
052257SPACER .49 X .62 X 1.87 PWDR/ZNC4Service part / kit Amazon eBay
052624BEARING BALL 6212 SEALED1Service part / kit Amazon eBay $15.38
052677WASHER NYLON .50 X .87 X .061Service part / kit Amazon eBay
052860NUT FLANGED HEX M12-1.754Service part / kit Amazon eBay
0536210410ASSY WIRE 14.00"1Service part / kit Amazon eBay
054455ADP OIL DRN 1/2-201Service part / kit Amazon eBay
055414LUG SLDLSS #2-#8 X 17/64 CU1Service part / kit Amazon eBay
055596BARBED STR 3/8 NPT X 3/81Service part / kit Amazon eBay
055911BLOCK TERM 20A 12 X 6 X 1100V1Service part / kit Amazon eBay
055934DCLAMP VINYL 1.06 X .406 Z1Service part / kit Amazon eBay $3.99
056739RELAY SOLENOID 12VDC PNL MNT1Service part / kit Amazon eBay
057019BALL BRG 65 X 120 X 232Service part / kit eBay
057019SBEARING #6213 SEALED1Service part / kit eBay
057073JUNCTION BLOCK 3/8-162Service part / kit Amazon eBay
057701BLOCK TERM 20A 8 X 6 X 1100V1Service part / kit Amazon eBay
057795ABARBED EL 90 3/4 PLASTIC1Service part / kit Amazon eBay
057796GROMMET1Service part / kit Amazon eBay
058208BATT 12VDC 24F 6251Service part / kit Amazon eBay
058665BATTERY 12VDC 90-AH 27F1Service part / kit Amazon eBay
061012PLUG STD PIPE 1/8 SOCKET HEAD1Service part / kit Amazon eBay
065852SPRING CLIP HOLDER .37-.621Service part / kit Amazon eBay
066760STRIP SEALANT 1/8 X 1 (44.52”LG)1Service part / kit Amazon eBay
067210ADECAL GROUND LUG1Service part / kit Amazon eBay
067377Start-up Inspection for Standby Power SystemsService part / kit Amazon eBay
068405CEXITER FIELD 2" LG SPD CONN1Service part / kit eBay
069811CAP HEX 1/4 NPT BRASS1Service part / kit Amazon eBay
070892SLIP RING MACHINED1Service part / kit Amazon eBay
075580FLANGE FUEL INLET1Service part / kit Amazon eBay
075763BOOT BATTERY CABLE1Service part / kit Amazon eBay
076749TANK COOLANT RECOVERY1Service part / kit Amazon eBay
077043FCONDUIT FLEX 1-1/4" (30" LG - 3.0L FORD & 3.9L CHRYSLER)1Service part / kit Amazon eBay
077043JCONDUIT FLEX 2.0" ID (36” LG)1Service part / kit Amazon eBay
077992NUT HEX LOCK M6-1.0 SS NY INS21Service part / kit Amazon eBay
078115WASHER SELF LOCKING DOME #4-4026Service part / kit Amazon eBay
078115AWASHER SELF LOCKING DOME #8-326Service part / kit Amazon eBay $2.74
080712BRKT COOLANT RECOVERY TANK1Service part / kit Amazon eBay
080762BOLT U 3/8-16 X 2.621Service part / kit Amazon eBay
081008GROMMET 1.25 X .25 X .751Service part / kit Amazon eBay
082573SWITCH RKR DPST 125V SPD1Service part / kit Amazon eBay
085917WASHER LOCK 3/8 SS2Service part / kit Amazon eBay
085918NUT HEX 3/8-16 SSTL1Service part / kit Amazon eBay
087233RIVET POP .1875 X .450 SS2Service part / kit Amazon eBay
087272ASSY EXCITER 2.00" STK1Service part / kit eBay
088775WASHER FLAT 3/8 SS2Service part / kit Amazon eBay
089514FTG CMPR 3/8TUBE X 3/8 NPT W/FERL1Service part / kit Amazon eBay
089685GROMMET .75 X .12 X .501Service part / kit Amazon eBay
089961FOAM STRIP 3/4"WIDE X 3/16"THK (294”LG)1Service part / kit Amazon eBay
090152ASSY BRIDGE RECTIFIER1Service part / kit eBay
090283CAP RADIATOR 13 PSI1Service part / kit Amazon eBay $19.99
0912970094ASSY WIRE 14 AWG 34.8" GRN/YEL2Service part / kit Amazon eBay
0A1786RETAINING COMPOUND2.5ccService part / kit eBay
0A2077CB 0125A 2P 240V S BQ2 LL1Service part / kit Amazon eBay $70.00
0A4121VALVE PCV1Service part / kit Amazon eBay
0A5062JSPACER 9.5H 3.2 ID4Service part / kit Amazon eBay $3.36
0A7822LUG SLDLSS 600/250-1/0 X 1/4-281Service part / kit Amazon eBay $24.99
0A9457DECAL NEUTRAL1Service part / kit Amazon eBay
0C2266SCREW PHTT M5-0.8 X 16 ZYC6Service part / kit Amazon eBay
0C2428SCREW PHTT #6-32 X 1/2 ZYC6Service part / kit Amazon eBay
0C2454SCREW THF M6-1 X 16 N WA Z/JS11Service part / kit Amazon eBay $17.00
0C2634AASSEMBLY COVER ACCESS1Service part / kit Amazon eBay
0C3397FASTENER RATCHET4Service part / kit Amazon eBay
0C3990SCREW PHTT M4-0.7 X 10 ZYC2Service part / kit Amazon eBay
0C9708INSTR HYPOT TEST (NOT SHOWN)REFService part / kit Amazon eBay
0D1509DECAL INLET PRESSURE1Service part / kit Amazon eBay
0D4698BLOCK TERM 20A 6 X 3 X 1100VREFService part / kit Amazon eBay
0D5466BUS BAR NEUTRAL BLOCK 390REFService part / kit Amazon eBay
0D5552CB 0050A 3P 480V S ED4 LL1Service part / kit Amazon eBay
0D5553CB 0060A 3P 480V S ED4 LLREFService part / kit Amazon eBay
0D5554CB 0070A 3P 480V S ED4 LLREFService part / kit Amazon eBay
0D5556CB 0090A 3P 480V S ED4 LL1Service part / kit Amazon eBay $449.00
0D5572CB 0150A 3P 600V S FD6 LL1Service part / kit Amazon eBay
0D5573CB 0175A 3P 600V S FD6 LLREFService part / kit Amazon eBay
0D5574CB 0200A 3P 600V S FD6 LLREFService part / kit Amazon eBay
0D5575CB 0225A 3P 600V S FD6 LLREFService part / kit Amazon eBay
0D5576CB 0250A 3P 600V S FD6 LLREFService part / kit Amazon eBay
0D5577CB 0300A 3P 600V S JD6 LL1Service part / kit Amazon eBay
0D6029SCREW HHTT M6-1.0 X 16 ZYC4Service part / kit Amazon eBay $29.48
0D7177VDIODE BRIDGE 1P 35A 1000V2Service part / kit buy
0D7178TControl Panel Fuse1Service part / kit Amazon eBay $26.44
0D9693CB 0125A 3P 480V S ED4 LL1Service part / kit Amazon eBay
0D9832SCREW HHC M12-1.75 X 75 SS4Service part / kit Amazon eBay
0E0170BEXHAUST BLANKET 850MM (C4)1Service part / kit Amazon eBay
0E0170CEXHAUST BLANKET 725MM (C4)1Service part / kit Amazon eBay
0E0992APLUG EXPANSION 14 OD10Service part / kit Amazon eBay
0E3161ASSY PCB BOSCH GOV DRIVER1Service part / kit Amazon eBay $124.95
0E3257SCREW HWHTF M6-1.0 X 164Service part / kit Amazon eBay
0E3664BASE, QN CIRCUIT BREAKER1Service part / kit Amazon eBay
0E4392ACTUATOR BOSCH 60 GOVERNOR1Service part / kit eBay $417.99
0E4394ACTUATOR BOSCH 40 GOVERNOR1Service part / kit Amazon eBay $416.99
0E4395ACTUATOR BOSCH 32 GOVERNOR1Service part / kit Amazon eBay $385.00
0E4494SWITCH RKR DPDT ON-OFF-ON1Service part / kit Amazon eBay $8.99
0E5048AFLEXPLATE HSB 3.9L CHRYSLER (1800RPM)1Service part / kit Amazon eBay
0E5706REAR BEARING CARRIER 390/DRCT1Service part / kit Amazon eBay
0E6002MTG TRACK BQ SIEMENS CB 3P1Service 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.

Available documents

Owner's manual — 0F3459 (Generac)Owner's manual — 5222.pdf (Generac)

This page was generated from the 2 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.

Air filter 0A4637$13.61
Oil filter 0E7415$3.59
Belt 0D3488H$49.99
Coolant 046627$15.00
Spark plug RC12LC4$26.61
5 priced items$108.80