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Generac V-type Engine

The Generac V-type is a 3.9 L 10-cylinder naturally aspirated engine rated at 1800 rpm, producing up to 88 kW. It powers generator sets from Generac, including the 4.6L, GenSpec007, MQT100 and QT 3.9L 40kW. It holds 3.8 L (1.0 gal) of oil and 4 L (1.1 gal) of coolant.

Also known as: Generac V-type

Part of the Generac V-type engine family — 3 variants share parts & fitment.

3.9 L

Displacement

Cylinders

1800 rpm

Rated speed

88 kW

Gross power

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

Engine specifications

Oil capacity	3.8 L
Coolant capacity	4.0 L
Displacement	3.9 L
Cylinders	10
Aspiration	Naturally Aspirated
Rated speed	1800 rpm
Gross power	88 kW

Generator sets powered by this engine

Generac 4.6LGenerac GenSpec007 Generac MQT100 Generac QT 3.9L 40kW Generac QT 5.4L Generac QT 6.8L 100kW Generac QT030 Generac QT040 Generac QT048 Generac QT050 Generac QT070 Generac QT080 Generac QT100 Generac QT10054ANSA Generac RG048 Generac SG060 Generac SG080

How to read your Generac engine serial & model number →

Common problems

No AC output from generator.
Cause: Defective Control Module circuit board
Fix: *Contact the nearest Authorized Dealer for assistance.
Engine won’t crank.
Cause: 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.
Fix: 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 starts then shuts down.
Cause: AUTO/OFF/MANUAL Switch at OFF, engine continues to run
Fix: *Contact the nearest Authorized Dealer for assistance.
Engine starts hard, runs rough.
Cause: 1. Flame arrestor (air cleaner) plugged or damaged. 2. Plugged fuel line. 3. Defective spark plugs. 4. Fuel pressure incorrect.
Fix: 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.
AUTO/OFF/MANUAL Switch at OFF, engine continues to run.
Cause: 1. Defective AUTO/OFF/MANUAL switch. 2. Open/disconnected wire #15A between AUTO/OFF/MANUAL switch and Control Module circuit board. 3. Defective Control Module circuit board.
Fix: 1. Replace switch. 2. Reconnect/close wire. 3. Replace board.
Engine cranks but won't start.
Cause: 1. Out of fuel. 2. Fuel solenoid (FS) is defective. 3. Spark plugs defective.
Fix: 1. Replenish fuel/turn on fuel valve. 2. Replace solenoid.* 3. Clean, regap or replace plugs.
Engine cranks but won't start
Cause: 1. 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.
Fix: 1. Replenish fuel. 2. Replace solenoid.* 3. Reconnect wire. 4. Clean, regap or replace plugs. 5. Close door on tank.
Generator does not start
Cause: Low coolant level
Fix: Check and refill engine coolant to proper level
Engine won't crank. 15
Engine overheats
Cause: High coolant temperature
Fix: Inspect cooling system; ensure radiator is clean and unobstructed; check fan operation
Defective AUTO/OFF/MANUAL switch.
Cause: 1. Open/disconnected wire #15A between AUTO/OFF/MANUAL switch and Control Module circuit board.
Fix: Replace switch.* Reconnect/close wire.
DANGER Safety 001

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

Maintenance schedule

Item	Spec	Capacity	Part #	Interval
Air filter			0A4637	500 hr	Amazon eBay $49.95 NAPA $13.61
Fuel filter			—	1000 hr
Oil filter	Changing the Engine Air Cleaner		0A4637	500 hr	Amazon eBay $49.95 NAPA $13.61
Battery	24F 525CCA; BCI Group 24F-6, 525 @ 0 deg. F		058665		Amazon eBay
Belt	67.16" LG		0D3488		Amazon eBay $55.43
Coolant	Half low silicate ethylene glycol base anti-freeze and deionized water (50-50 mixture)	3.0 U.S. gal.	046627		Amazon eBay $15.00
Coolant filter	Cooling System		—	1000 hr
Oil		100.0	—	1000 hr
Spark plug	Gap 1.01 mm (0.040 inch); Champion # RC12LC4		RC12LC4		Amazon eBay $26.61

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

Repair guides

Step-by-step procedures compiled from the Generac service manual for this engine.

Service intervals

Item	Action	Hours	Months	Notes
Air inlets and outlets	Clean	10 hr	1 mo	Level 1; remove debris
Battery electrolyte level and specific gravity	Check	10 hr	1 mo	Level 1; if accessible
Battery posts, cables and charger	Check	10 hr	1 mo	Level 1; loose connections, corrosion, proper operation
Engine coolant thermal protection level	Check	10 hr	1 mo	Level 1
Engine oil level	Check	20 hr	1 mo	Level 1, recommended monthly/10 hrs; also check at least every 20 hours of operation
Natural gas delivery system (leaks and correct pressure)	Check	10 hr	1 mo	Level 1; gas engine driven units
Unit (Service Schedule Level 1)	Inspect	10 hr	1 mo	Recommended: monthly / 10 hrs
Unit wiring	Check	10 hr	1 mo	Level 1
Engine oil level / crankcase oil	Check	20 hr		Check at least every 20 hours of operation, or prior to use
Automatic start and transfer to site load (exercise at least 1 hour)	Test	30 hr	3 mo	First service — Level 2 break-in
Engine accessory drive belts	Replace	30 hr	3 mo	First service — Level 2 break-in
Engine accessory drive belts and fan coupling device	Check	30 hr	3 mo	First service — Level 2 break-in, performed once after first 3 months or first 30 hours; check tension, wear, weather cracking, damage
Engine and transfer switch safety devices	Test	30 hr	3 mo	First service — Level 2 break-in; test semi-annually or every 50 hours thereafter
Engine break-in oil and filter	Change	30 hr		First service — First 30 operating hours
Engine oil (break-in oil)	Change	30 hr		First service — Engine shipped with break-in oil; change after 30 hours of operation
Engine valve clearance	Adjust	30 hr	3 mo	First service — Level 2 break-in inspection
Unit (Service Schedule Level 2 break-in)	Inspect	30 hr	3 mo	First service — Wear-in inspection performed ONLY ONCE following first three months or first 30 hours
Unit visual inspection (leaks, wear, damage, loose connections, corrosion)	Inspect	30 hr	3 mo	First service — Level 2 break-in inspection
Clean/Inspect Air Inlet & Exhaust	Clean	50 hr	6 mo	Service Schedule A alert; requires 3 month / 30 hour break-in change or check
Unit (Service Schedule Level 3)	Inspect	50 hr	6 mo	Semi-annually or following each 50 hours
Change / Inspect Air Filter	Change	100 hr	12 mo	Service Schedule A alert
Change Oil & Filter	Change	100 hr	12 mo	Service Schedule A alert; requires 3 month / 30 hour break-in change or check
Coolant Change & Flush	Change	100 hr	12 mo	Service Schedule A alert
Engine oil and oil filter	Change	150 hr	6 mo	First service — First 100 operating hours; thereafter every 150 hours or 6 months
Inspect Accessory Drive	Inspect	100 hr	12 mo	Service Schedule A alert; requires 3 month / 30 hour break-in change or check
Inspect Battery	Inspect	100 hr	12 mo	Service Schedule A alert
Inspect Spark Plugs	Inspect	100 hr	12 mo	Service Schedule A alert
Oil	Change	100 hr	12 mo	First service — Change after first 30 hours, then every 100 hours or annually, whichever occurs first. Change sooner under heavy load, dusty/dirty environment or high ambient temperatures.
Oil Filter	Change	100 hr	12 mo	First service — Change after first 30 hours, then every 100 hours or annually, whichever occurs first.
Unit (Service Schedule Level 4)	Inspect	100 hr	12 mo	Annually or following each 100 hours
Change / Inspect spark plugs	Change	250 hr	24 mo	Service Schedule B alert
Generator set	Inspect	250 hr	12 mo	First service — Level 5 - comprehensive inspection, annually or each 250 hours
Unit (Service Schedule Level 5)	Inspect	250 hr	24 mo	Annually or following each 250 hours
Air cleaner	Check	500 hr		Service air cleaner
Air cleaner	Clean	500 hr		Service air cleaner
Air cleaner	Other	500 hr		Every 500 operating hours: service air cleaner
Engine DC alternator	Check	500 hr		Every 500 operating hours
Starter	Check	500 hr		Every 500 operating hours
air cleaner	Change	500 hr		Every 500 operating hours
Air Cleaner	Inspect		12 mo	Yearly; replace as necessary

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	Fan belt deflection	3/8 to 5/8	inch (10 to 16 mm)	force of approximately 22 pounds (10 kg) applied midway between pulleys
Clearance	Fan belt deflection	3/8 to 5/8 inch (10 to 16 mm) with approximately 22 pounds (10 kg) applied midway between pulleys	inch (mm)
Clearance	Fan belt deflection (force of approx. 22 pounds / 10 kg applied midway between pulleys)	3/8 to 5/8	inch (10 to 16 mm)	midway between pulleys
Clearance	Fan belt tension (deflection)	3/8 to 5/8	inch	thumb pressure exerted midway between pulleys
Gap	Spark plug gap	0.040	inch
Gap	Spark plug gap	1.01	mm (0.040 inch)
Gap	Spark plug gap	1.01 mm (0.040 inch)	mm (inch)
Gap	Spark plug gap	1.14	mm (0.045 inch)
Gap	Spark plug gap	1.14 mm (0.045 inch)	mm (inch)
Other	Air flow (inlet air including alternator and combustion air)	2460	ft3/min
Other	Air flow (inlet air including alternator and combustion air)	6450	ft3/min.
Other	Altitude deration	1	% for every 100 m above 183 m
Other	Altitude deration	1% for every 100 m above 183 m; 3% for every 1000 ft above 600 ft
Other	Altitude deration	1% for every 100 m above 183 m; 3% for every 1000 ft. above 600 ft.	%	above rated altitude
Other	Altitude deration	3	% for every 1000 ft. above 600 ft.
Other	Belt tension deflection (midway between pulleys)	3/8 to 5/8	inch (10 to 16 mm)	22 pounds (10 kg) force
Other	Combustion air requirements (natural gas)	92	cfm	at rated power, 60 Hz
Other	Combustion air requirements (natural gas) flow at rated power	118	cfm	60 Hz
Other	Combustion air requirements (natural gas), flow at rated power 60 Hz	336	cfm
Other	Coolant capacity	3.0	U.S. gal
Other	Coolant capacity	4.5	U.S. gal.
Other	Crankcase oil capacity	4	U.S. qts (3.8 liters)
Other	Crankcase oil capacity (Maintenance section)	4.0	U.S. quarts (3.8 liters)
Other	Crankcase oil capacity (Specifications section)	5	U.S. qts.
Other	Cranking limit	30	seconds	do not crank continuously longer than 30 seconds or starter motor heat damage may occur
Other	Engine HP at rated kW, 60 Hz	210	HP	60 Hz
Other	Engine timing 5.4L (NG/LP)	26	degrees BTDC	1800 rpm
Other	Engine timing 6.8L (NG/LP)	22	degrees BTDC	1800 rpm
Other	Engine timing 6.8L (NG/LP)	24	degrees BTDC	3600 rpm
Other	Exhaust flow at rated output	200	cfm	60 Hz
Other	Exhaust flow at rated output	318	cfm	60 Hz
Other	Exhaust flow at rated output, 60 Hz	1119	cfm
Other	Fan belt tension	22	pounds (10 kg)	Applied midway between pulleys, deflects belt about 3/8- to 5/8-inch (10 to 16 mm)
Other	Fan belt tension (thumb pressure)	deflect about 3/8 to 5/8 inch	inch	Midway between pulleys
Other	Fan 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
Other	Fan diameter	18	inches
Other	Fan diameter	26	inches	puller mode
Other	Generator locked rotor KVA available @ 35% voltage dip	200 KVA single-phase or 208 3-phase; 240 KVA 480V 3-phase	KVA	voltage dip of 35%
Other	Generator locked rotor KVA available @ 35% voltage dip (480V 3-phase)	320	KVA	voltage dip of 35%
Other	Generator locked rotor KVA available @ 35% voltage dip (single-phase or 208 3-phase)	270	KVA	voltage dip of 35%
Other	Generator locked rotor kVA available @ 35% voltage dip	80	KVA	single-phase or 208V, 3-phase
Other	Generator locked rotor kVA available @ 35% voltage dip	90	KVA	480V, 3-phase
Other	Generator locked rotor kVA available at 35% voltage dip	60	KVA	single-phase or 208 3-phase; 480V 3-phase = 70 KVA
Other	Generator total harmonic distortion	< 3.5%	%
Other	Governor steady state regulation	± 1/4	%	isochronous
Other	Heat rejection to coolant	115,000	Btu/h
Other	Heat rejection to coolant	496,000	Btu/h
Other	Ignition diagnostic LED normal flash rate	0.5 sec ON and 0.5 sec OFF (one blink)	seconds	normal ignition operation
Other	Ignition power down delay after fault	60	seconds	ignition fault occurred
Other	Ignition stops firing coils on loss of cam signal	approx. 3	seconds	loss of cam signal
Other	Ignition timing, 5.4L engine	26 degrees BTDC at 1800 rpm; 26 degrees BTDC at 3600 rpm	degrees BTDC	NG/LP
Other	Ignition timing, 6.8L engine	22 degrees BTDC at 1800 rpm; 24 degrees BTDC at 3600 rpm	degrees BTDC	NG/LP
Other	Operating fuel pressure (natural gas / LP)	11 to 14	inches water column (0.4 to 0.5 psi)
Other	Overspeed shutdown	+20% of nominal for 3 seconds, or +25% immediate		nominal engine speed = 60.0 Hz
Other	Steady state regulation (governor)	± 0.25%
Other	Telephone interference factor (TIF)	< 50
Other	Temperature deration	1.65	% for every 10° above 77° F
Other	Temperature deration	3	% for every 10° C above 25° C
Other	Temperature deration	3% for every 10° C above 25° C; 1.65% for every 10° above 77° F	%	above rated ambient
Other	Total harmonic distortion	< 3.5	%

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	50-50 low silicate ethylene glycol base anti-freeze and deionized water	Low silicate anti-freeze		4.5 U.S. gal.	Add high quality rust inhibitor if desired
Coolant	50-50 mixture of low silicate ethylene glycol base anti-freeze and deionized water			3.0 U.S. gal	Do not use chromate base rust inhibitor; high silicate boosters or soluble oil inhibitor not recommended
Coolant	Ethylene glycol 50/50 mix			11.0 l	RG048: 11 l, RG060/RG080: 17 l
Coolant	Half low silicate ethylene glycol base anti-freeze and deionized water (50-50 mixture)	Low silicate anti-freeze; deionized water; high quality rust inhibitor optional		3.0 U.S. gal.	Do not use chromate base rust inhibitor, high silicate anti-freeze boosters or soluble oil inhibitors
Coolant	Half low silicate, ethylene glycol base antifreeze and half soft water (50-50)			17.0 L	Cooling System SG035/045/075 = 17 L (4.5 U.S. gals.); do not use chromate base rust inhibitor or high silicate antifreeze boosters
Coolant	Mixture of half low silicate ethylene glycol base anti-freeze and deionized water (50-50)	Low silicate anti-freeze only; deionized water only		4.5 U.S. gallons	Do not use chromate base rust inhibitor; high silicate anti-freeze boosters or soluble oil inhibitors not recommended
Engine oil	15W-40	For Service CC, SD, SE, SF (high-quality detergent oil)			Unit filled with 15W-40 engine oil at the factory; break-in oil should be changed after 30 hours of operation
Engine oil	15W-40 (factory fill); above 80° F (27° C): SAE 30W or 15W-40; 32° to 80° F (0° to 27° C): SAE 20W-20 or 15W-40; below 32° F (0° C): 5W-30 synthetic	High-quality detergent oil classified "For Service CC, SD, SE, SF"		4.0 U.S. quarts	Crankcase oil capacity 4.0 U.S. quarts (3.8 liters) per Maintenance section; 6 U.S. qts listed in Specifications
Engine oil	5W-20 (factory fill); 5W-30	For Service SJ or SH		5.0 U.S. qts.	Use 5W-30 synthetic oil below 32°F
Engine oil	5W-30 (factory fill 5W-20)	For Service SJ or SH		6.0 U.S. qts	Synthetic oil recommended. For temperatures below 32°F, use optional Cold Weather Start Kit; oil grade below 32°F is 5W-30 synthetic.
Engine oil	5W-30 synthetic		below 0°C		For temperatures below 32°F (0°C); optional Cold Weather Start Kit recommended
Engine oil	5W-30 synthetic oil		below 0°C		Below 32° F (0° C); optional Cold Weather Start Kit recommended (part no. 0F6148A)
Engine oil	SAE 10W or 15W-40	For Service CC, SD, SE or SF	below 0°C	4.25 L	Below 32 F (0 C)
Engine oil	SAE 20W-20 or 15W-40	For Service SJ or SH	0°C to 27°C		32° to 80°F (0° to 27°C)
Engine oil	SAE 30W or 15W-40	For Service SJ or SH	above 27°C	4.0 U.S. quarts	Above 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)
Fuel	LP gas (Btu content at least 2,520 Btus per cubic foot)				Required fuel pressure 5 to 14 inches water column
Fuel	LP gas / Propane vapor	At least 2,520 Btus per cubic foot			5 to 14 inches water column required fuel pressure
Fuel	LP gas, Btu content at least 2,520 Btu's per cubic foot				Required pressure 11 to 14 inches water column (0.4 to 0.5 psi)
Fuel	Natural Gas	At least 1,000 Btus per cubic foot			5 to 14 inches water column required fuel pressure
Fuel	Natural gas (Btu content at least 1,000 Btus per cubic foot)				Required fuel pressure 5 to 14 inches water column
Fuel	Natural 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
Fuel	Natural gas at least 1,000 Btu/cu ft; LP gas at least 2,520 Btu/cu ft				Operating fuel pressure 11 in. - 14 in. water column
Fuel	Natural gas, Btu content at least 1,000 Btu's per cubic foot				Required pressure 11 to 14 inches water column (0.4 to 0.5 psi); optimum 11 inches water column at fuel shutoff solenoid
Fuel	Natural gas, propane vapor				Operating fuel pressure 5" - 14" H2O; secondary fuel regulator and fuel shut off solenoid standard
Fuel	Natural gas: Btu content of at least 1,000 Btu's per cubic foot; LP gas: at least 2,520 Btu's per cubic foot	Natural gas required pressure 11 to 14 inches water column; liquid propane 11 to 14 inches water column			Engine is not field convertible between natural gas and propane; jet size and ignition timing are factory set
Gear oil	ENHANCER GEAR OIL				Part number 0F6477, .050 GAL
Gear oil	SAE 90 gear lubricant				Generator gearbox (if equipped)
Gear oil	SAE 90 gear lubricant; 75W90 synthetic gear oil (cold weather kit)			1.0 qt	For generator gearbox, if so equipped
Grease	LUBE GREASE SAE #90 80W90				Part number 027175, .200 GAL

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

Procedures

Reconfiguring the Fuel System (NG to LP / LP to NG) adjustment

⚠ No provision for dual fuel has been made.

Turn the main gas supply off.
Remove carburetor fuel hose from outlet port (Port 1) of demand regulator.
Remove brass hose fitting from outlet port (Port 1).
Remove pipe plug from Port 2.
Install brass hose fitting into Port 2; install pipe plug into Port 1.
Connect carburetor gas hose to brass fitting.
Tighten all clamps and plugs.
Make sure fuel supply is of proper pressure and type.
Reverse procedure to convert back to natural gas.
Set the dip switch inside the control panel to LP or NG position.

Reconfiguring the Fuel System (NG to LP) adjustment

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

Set or Replace Spark Plugs adjustment

⚠ Do not blast the spark plugs to clean.

Tools: Wire brush, Commercial solvent, Wire feeler gauge

Clean the area around the base of the spark plugs to keep dirt and debris out of the engine.
Remove the spark plugs and check the condition. Replace if worn or if reuse is questionable.
Check the spark plug gap using a wire feeler gauge.
Adjust the gap to 1.14 mm (0.045 inch) by carefully bending the ground electrode.

Spark Plugs adjustment

⚠ Do not blast the spark plugs to clean.

Tools: wire feeler gauge, wire brush

Clean the area around the base of the spark plugs.
Remove the spark plugs and check the condition. Replace if worn.
Check the spark plug gap using a wire feeler gauge. Adjust gap to 1.14 mm (0.045 inch).

Spark Plugs - Inspection and Gap Adjustment adjustment

Tools: wire feeler gauge, wire brush

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

Catalyst and Heat Shield Assembly installation

⚠ Catalyst must be mounted in described position.

Disconnect battery cables; disconnect negative first.
Insert outlet pipe 2 to 3 inches into outlet of catalyst; slide one U-bolt onto outlet and tighten.
Slide remaining U-bolt and catalyst over exhaust pipe; insert 2 to 3 inches into inlet; align flat side; tighten U-bolt.
Sub-assemble heat shield panels and cap using screws provided.
Slide heat shield subassembly over the catalyst.
Fasten heat shield assembly to enclosure using screws provided.
Install rain cap over outlet of catalyst and tighten.

Preparation for Start-Up installation

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

Tools: Manometer

Ensure 120VAC circuit breaker to battery charger is open.
Remove the fuse from the control panel (H-100/R-series: 15 Amp ATO fuse).
Connect battery cables; attach negative cable last.
Close 120VAC circuit breaker to the battery charger.
Insert the fuse into the control panel.
Move AUTO/OFF/MANUAL switch to MANUAL; engine should crank and start.
Check voltage at generator terminals and check for leaks.
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

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

Preparation for Start-up (Start-up Checklist) installation

Tools: manometer

Ensure the 120VAC circuit breaker to the battery charger is open.
Remove the 15 Amp ATO fuse from the control panel.
Connect the battery cables to the battery; attach negative cable last.
Close the 120VAC circuit breaker to the battery charger.
Measure battery voltage before and after charger is turned on.
Verify all AC electrical connections are tight.
Check all hoses, clamps, fittings for leaks or damage.
Open the valve to the engine fuel line and bleed the fuel system of air.
Open the generator main line circuit breaker.
Connect a manometer to the gas line and record static pressure.
Insert the fuse into the control panel.
Move the AUTO/OFF/MANUAL switch to manual; engine should crank and start.
Check voltage at the generator terminals and phase rotation for 3-phase units.
Close the generator main line circuit breaker and turn the set off.

Preparing Genset for Start-up installation

⚠ Before working on the generator, ensure the AUTO/OFF/MANUAL switch is in the OFF position and the 120VAC supply to the battery charger is switched OFF.

Tools: Manometer

Ensure that the 120VAC circuit breaker to the battery charger is open.
Remove the fuse from the control panel (15 Amp ATO fuse).
Connect the battery cables to the battery; attach negative battery cable last.
Close the 120VAC circuit breaker to the battery charger.
Measure the voltage at the battery before and after the charger is turned on.
Verify all AC electrical connections are tight at the circuit breaker and transfer switch.
Check all hoses, clamps and fittings for leaks or damage.
Open the valve to the engine fuel line and bleed the fuel system of air.

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

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

Start-up Checklist - Preparation for Start-up installation

⚠ Before working on the generator, ensure the AUTO/OFF/MANUAL switch is in the OFF position and the 120VAC supply to the battery charger is switched OFF.

Tools: manometer

Ensure the 120VAC circuit breaker to the battery charger is open.
Remove the 15 Amp ATO fuse from the control panel.
Connect the battery cables to the battery, attaching the negative cable last.
Close the 120VAC circuit breaker to the battery charger. Measure battery voltage before and after.
Verify all AC electrical connections are tight at the circuit breaker and transfer switch.
Open the valve to the engine fuel line and bleed the fuel system of air.
Insert the fuse into the control panel, then move AUTO/OFF/MANUAL switch to MANUAL to crank and start.

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
120/208	3	6 wire	3-Phase 6 wire alternator output	Power factor 0.8
120/208	3	Stator power winding connections, 3-phase Y (6 lead)	6	Rated voltage between breaker terminals E1-E2, E1-E3 and E2-E3 is 208V; between each terminal and neutral point 00 is 120V
120/208	3-phase	"Y" configuration - Stator Power Winding Connections, 3-phase, 120/208V (12 Lead)	12	Rated voltage between circuit breaker terminals is 208V; terminal to neutral 00 is 120V.
120/208V	3	Stator Power Winding Connections - 3-phase, Y configuration	6	L-L 208V; L-N 120V
120/208V	3	Stator power winding connections - 3-phase, 120/208V (6 Lead), "Y" configuration	6 lead	Rated voltage L-L 208V; L-N 120V.
120/208V	3	Y configuration (6 lead)	6	Rated voltage between circuit breaker terminals E1-E2, E1-E3, E2-E3 is 208V; between each terminal and neutral point 00 is 120V.
120/208V	3	Y configuration, 3-phase (12 lead)	12 lead (S10, S12, S4, S5, S2, S8, S11, S6, S3, S9, S7, S1)	Rated voltage between breaker terminals E1-E2, E1-E3, E2-E3 is 208V; between each terminal and neutral point 00 is 120V
120/208V	3-phase	Stator Power Winding - 'Y' configuration	6-lead	Figure 7.4.
120/208V	3-phase	Y 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
120/240	1	4 wire	1-Phase 4 wire alternator output	Power factor 1.0
120/240	1	Four-lead, single-phase stator (Voltage Code A)	4	Rated voltage between each circuit breaker terminal is 240V; between each terminal and neutral point 00 is 120V
120/240	1-phase	Four-lead, single-phase stator; windings connected at factory to main circuit breaker	4-wire	Rated voltage between each circuit breaker terminal is 240V; between each circuit breaker terminal and neutral point 00 is 120V. Voltage code 'A'.
120/240	3	6 wire	3-Phase 6 wire alternator output	Power factor 0.8
120/240V	1	Four-lead, single-phase stator - voltage code "A" (240V, 1-phase, 60 Hz)	4-lead	Rated voltage between each circuit breaker terminal is 240V; rated voltage between each circuit breaker terminal and the neutral point 00 is 120V.
120/240V	1	Four-lead, single-phase stator; windings connected at factory to main circuit breaker	4	Voltage code A (240V, 1-phase, 60 Hz). Rated voltage between each circuit breaker terminal and neutral point 00 is 120V.
120/240V	3	Stator Power Winding Connections - 3-phase, Delta configuration	6	Rated voltage E1-E2, E1-E3, E2-E3 is 240V; E1 or E3 to neutral 00 is 120V
120/240V	3-phase	Stator Power Winding - 'Delta' configuration	6-lead	Figure 7.7. Rated voltage between E1-E2, E1-E3, E2-E3 is 240V; E2-00 is 208V; E1-00 and E3-00 approximately 120V.
208	3-phase			Circuit breaker wire and conduit size - 130kW, 208V 3-phase: CB amps 500, lug size 2-3/0 to 500 mcm.
240	1-phase			Circuit breaker wire and conduit size - 130kW, 240V 1-phase: CB amps 600, lug size 2-3/0 to 500 mcm.
240V	1	Four-lead, Single-phase Stator (voltage code A)	4	Rated voltage between terminals 240V; terminal to neutral 00 is 120V
240V	1-phase	Four-lead, Single-phase Stator (voltage code A)	4-lead	Rated voltage between each circuit breaker terminal is 240V; between each terminal and neutral point 00 is 120V. Factory connected to main circuit breaker. Figure 7.1.
240V	1-phase	Four-lead, single-phase stator (voltage code A)	4-lead	Rated voltage between each circuit breaker terminal is 240V; between each terminal and neutral point 00 is 120V
240V (120V line-to-neutral)	1	Four-lead, single-phase stator (voltage code A)	4-lead	Windings connected at factory to main circuit breaker; rated voltage between each circuit breaker terminal and neutral point 00 is 120V
277/480	3	6 wire	3-Phase 6 wire alternator output	Power factor 0.8
277/480	3	Stator power winding connections, 3-phase Y (6 lead)	6	Rated voltage between breaker terminals E1-E2, E1-E3 and E2-E3 is 480V; between each terminal and neutral point 00 is 277V
277/480	3-phase	"Y" configuration - Stator Power Winding Connections, 3-phase, 277/480V (12 Lead)	12	Rated voltage between circuit breaker terminals E1-E2, E1-E3, E2-E3 is 480V; terminal to neutral 00 is 277V.
277/480V	3	Stator Power Winding Connections - 3-phase, Y configuration	6	L-L 480V; L-N 277V
277/480V	3	Stator power winding connections - 3-phase, 277/480V (6 Lead), "Y" configuration	6 lead	Rated voltage between circuit breaker terminals E1-E2, E1-E3 and E2-E3 is 480V; between each terminal and neutral point 00 is 277V.
277/480V	3	Y configuration (6 lead)	6	Rated voltage between circuit breaker terminals E1-E2, E1-E3, E2-E3 is 480V; between each terminal and neutral point 00 is 277V.
277/480V	3	Y configuration, 3-phase (12 lead)	12 lead (S1, S4, S7, S12, S11, S10, S8, S5, S2, S9, S6, S3)	Rated voltage between 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.

Parts cataloged across the Generac V-type family

300

Part #	Description	Category
0A4637	Air Cleaner	Air filter
0C8127	ELEMENT AIR CLEANER	Air filter
0E7702	HOLD DOWN AIR CLEANER	Air filter
0F5418	ELEMENT AIR FILTER	Air filter
0F5419	ELEMENT AIR FILTER	Air filter
0F6322	BOTTOM PLATE, AIR CLEANER 3.9L	Air filter
0F6323	PLATE, AIR CLEANER TOP 3.9L	Air filter
0E9868A	ALTERNATOR DC W/OUT PULLEY	Alternator
0F3446	BRKT R/H SIDE D.C. ALTERNATOR	Alternator
0F3447	BRKT L/H SIDE D.C. ALTERNATOR	Alternator
0F6480	BRKT L/H SIDE DC ALTERNATOR	Alternator
067680	ASSY VOLTAGE REGULATOR 60HZ	Avr
0F2256	ASSY PCB PWR AVR W/AMP HEADER	Avr
0D3488	BELT SERPENTINE (67.16" LG) (3000 RPM)	Belt
0D3488B	BELT SERPENTINE 40.85" LG (3600 RPM)	Belt
0D3488F	BELT SERPENTINE 38.35" LG (1800 RPM)	Belt
0D3488G	BELT SERPENTINE (65.0" LG) (1800 RPM)	Belt
0D3488H	SERPENTINE BELT (60.5")	Belt
0D3488J	BELT SERPENTINE (65.3" LG) (2300 RPM)	Belt
0D3488K	SERPENTINE BELT (68.3" LG) (3600 RPM)	Belt
0D3488R	BELT SERPENTINE 54.72"	Belt
0D8030	TENSIONER ENG. AUTOMATIC BELT	Belt
0F5253	V-BELT 31/64" X 61-3/8" (5.4L 100KW ONLY)	Belt
0F5254	V-BELT 31/64" X 62-3/8"	Belt
0F7077	V-BELT 1/2" X 63-3/8" (6.8L, 100KW & 130KW)	Belt
0F7874	ASSY BRUSH HOLDER 390/HSB	Brush
027175	LUBE GREASE SAE #90 80W90 (NOT SHOWN)	Fluid
0F6477	ENHANCER GEAR OIL (NOT SHOWN)	Fluid
044149	GASKET EXHAUST RING	Gasket
064945	GASKET CARB ADAPTOR	Gasket
0A6765	RING GASKET 2.5 DIA	Gasket
0D2698	GASKET ADAPTER THROT BODY	Gasket
0D4255	GASKET EXHAUST MANIFOLD	Gasket
0E4390	GASKET GOVERNOR ACTUATOR	Gasket
0E5968	GASKET EXTRUDED TRIM (328” LG)	Gasket
0E6586	GASKET BOSCH 32 & 40	Gasket
0E7163	GASKET EXHAUST 3.0L FORD	Gasket
0E7841	GASKET THERMOSTAT ADAPTOR	Gasket
0F2097	GASKET 390 GEARBOX	Gasket
0F2843	GASKET THERMOSTAT HOUSING G3	Gasket
0F4269	GASKET MIXER BODY	Gasket
0F6355	GASKET SEAL PLATE 390 GB	Gasket
0G5511	GASKET THERMOSTAT 4.2L	Gasket
029032	HOSE 9/32 ID (43"LG)	Hose
035685	CLAMP HOSE #28 1.32-2.25	Hose
040105	HOSE COOL 2 IN ID 20R4	Hose
042561	CLAMP HOSE #36 1.88-2.75	Hose
047290	HOSE 3/8 ID SINGLE BRAID (16” LG)	Hose
048031C	CLAMP HOSE BAND 1/4	Hose
048031J	CLAMP HOSE BAND .63	Hose
052223	HOSE 1/2 ID SAE-30R2 FUEL/OIL (14"LG)	Hose
057822	CLAMP HOSE #8 .53-1.00	Hose
057823	CLAMP HOSE #10 .56-1.06	Hose
057824	CLAMP HOSE #16 .87 - 1.50	Hose
059057	HOSE 3/4 ID SAE-30R2	Hose
059193C	HOSE 5/8 ID X 31.0" LG	Hose
059194	HOSE 5/8 ID LPG & NG (24" LG)	Hose
065386	HOSE COOL 5/8 ID 100R6 (15"LG)	Hose
069860E	HOSE DRAIN ASSY 28"	Hose
077879	HOSE VACUUM 5/32	Hose
0A6283	HOSE PREFORMED BLOCK HEATER	Hose
0C7649	CLAMP HOSE .38-.87	Hose
0F2686	HOSE RADIATOR UPPER CPL	Hose
0F3228	HOSE LOWER RAD CPL C2 3.0L	Hose
0F4301	HOSE OIL COOLER (150KW 3600RPM)	Hose
0F4413	HOSE UPPER RAD CPL C2 3.9L	Hose
0F4414	HOSE LOWER RAD CPL C2 3.9L	Hose
0F5463	HOSE LOWER RAD CPL C5 6.8L	Hose
0F6631	HOSE RADIATOR ENGINE	Hose
0F6761	HOSE UPPER RAD CPL C2 3.0L	Hose
0G0321	HOSE COOL 5/8" ID 250#WP (14")	Hose
0G0866	HOSE OIL COOLER PREFORMED 3/4 (150KW 3600RPM)	Hose
0H3908	HOSE RADIATOR LOWER C5 CPL	Hose
0H3909	HOSE RADIATOR UPPER C5 CPL	Hose
0F3158	OIL COOLER FORD (150KW 3600RPM)	Oil cooler
0D5419	OIL FILTER, FORD V-10 ENGINE	Oil filter
0E7080	OIL FILTER 3.0L FORD	Oil filter
0E7415	Oil Filter	Oil filter
022097	WASHER LOCK M6-1/4	Service part / kit
022127	NUT HEX 1/4-20 STEEL	Service part / kit
022129	WASHER LOCK M8-5/16	Service part / kit
022152	WASHER LOCK #10	Service part / kit
022155	WASHER LOCK #6	Service part / kit
022158	NUT HEX #10-32 STEEL	Service part / kit
022237	WASHER LOCK 3/8	Service part / kit
022241	NUT HEX 3/8-16 STEEL	Service part / kit
022264	WASHER LOCK #8-M4	Service part / kit
022447	WASHER SHAKEPROOF INT 1/4	Service part / kit
022473	WASHER FLAT 1/4-M6 ZINC	Service part / kit
023454	KEY WOODRUFF #E	Service part / kit
023484N	BUSHING SNAP SB-2.5-31	Service part / kit
023897	WASHER FLAT #10 ZINC	Service part / kit
024114	NUT HEX 5/16-24 STEEL	Service part / kit
024469	SCREW HHTT #10-32 X 3/8 CZ	Service part / kit
025433	LUG SLDLSS #6-14 X 13/64 CU	Service part / kit
026812	ELBOW 90D 3/4 NPT	Service part / kit
026847	BREATHER	Service part / kit
026915	NIPPLE CLOSE 3/4 X 1.375	Service part / kit
026925	PLUG STD PIPE 3/8 STEEL SQ HD	Service part / kit
029289	TAPE ELEC 1/2 FOAM (AS REQ’D)	Service part / kit
029673	DIO BRIDGE 25A 600V	Service part / kit
031919	PLUG STD PIPE 3/8 COUNTERSUNK	Service part / kit
036797	BOLT U 5/16-18 X 2.25	Service part / kit
036943	SCREW PPHM #10/32 X 2	Service part / kit
037561	NUT WING 1/4-20 NYLK	Service part / kit
038804Y	CABLE BATT RED #1 X 35.00	Service part / kit
038805H	CABLE BATT BLK #1 X 23.00	Service part / kit
040532	CB 0100A 3P 240V S BQ3 LL	Service part / kit
042568	SCREW HHC M6-1.0 X 20 G8.8	Service part / kit
043180	WASHER FLAT M4	Service part / kit
043790	BARBED EL 90 3/8 NPT X 3/8	Service part / kit
044118	BARBED STR 1/2 NPT X 5/8	Service part / kit
04576100AQ	STUD M14-2.0 X 615 G5 ZINC	Service part / kit
04576100BU	STUD M14-2.0 570 G5 ZINC	Service part / kit
046627	CAP RADIATOR	Service part / kit
047248	BALL BEARING-45 MM	Service part / kit
047411	SCREW HHC M6-1.0 X 16 G8.8	Service part / kit
048467	CIRCT BRK 7 X 1 ETA 46-500-P	Service part / kit
049226	WASHER LOCK M5	Service part / kit
049721	SCREW HHC M6-1.0 X 35 G8.8 BLK	Service part / kit
049813	NUT HEX M6 X 1.0 G8 YEL CHR	Service part / kit
050279	DECAL FUEL INLET NG (NATURAL GAS APPLICATION)	Service part / kit
050280	DECAL FUEL INLET LPG (LP VAPOR APPLICATION)	Service part / kit
050331	BATTERY POST COVER BLACK	Service part / kit
050331A	BATTERY POST COVER RED +	Service part / kit
050873A	PLUG PIPE 1/4 CSK W/ VIBRA SL	Service part / kit
051713	WASHER FLAT M5	Service part / kit
052250	TAPE FOAM 1 X 1 (26.75” LG)	Service part / kit
052251	DAMPENER VIBRATION 40 BLUE	Service part / kit
052252	DAMPENER VIBRATION	Service part / kit
052257	SPACER .49 X .62 X 1.87 PWDR/ZNC	Service part / kit
052624	BEARING BALL 6212 SEALED	Service part / kit
052677	WASHER NYLON .50 X .87 X .06	Service part / kit
052860	NUT FLANGED HEX M12-1.75	Service part / kit
0536210410	ASSY WIRE 14.00"	Service part / kit
054455	ADP OIL DRN 1/2-20	Service part / kit
055414	LUG SLDLSS #2-#8 X 17/64 CU	Service part / kit
055596	BARBED STR 3/8 NPT X 3/8	Service part / kit
055911	BLOCK TERM 20A 12 X 6 X 1100V	Service part / kit
055934D	CLAMP VINYL 1.06 X .406 Z	Service part / kit
056739	RELAY SOLENOID 12VDC PNL MNT	Service part / kit
057019	BALL BRG 65 X 120 X 23	Service part / kit
057019S	BEARING #6213 SEALED	Service part / kit
057073	JUNCTION BLOCK 3/8-16	Service part / kit
057701	BLOCK TERM 20A 8 X 6 X 1100V	Service part / kit
057795A	BARBED EL 90 3/4 PLASTIC	Service part / kit
057796	GROMMET	Service part / kit
058208	BATT 12VDC 24F 625	Service part / kit
058665	BATTERY 12VDC 90-AH 27F	Service part / kit
061012	PLUG STD PIPE 1/8 SOCKET HEAD	Service part / kit
065852	SPRING CLIP HOLDER .37-.62	Service part / kit
066760	STRIP SEALANT 1/8 X 1 (44.52”LG)	Service part / kit
067210A	DECAL GROUND LUG	Service part / kit
067377	Start-up Inspection for Standby Power Systems	Service part / kit
068405C	EXITER FIELD 2" LG SPD CONN	Service part / kit
069811	CAP HEX 1/4 NPT BRASS	Service part / kit
070892	SLIP RING MACHINED	Service part / kit
075580	FLANGE FUEL INLET	Service part / kit
075763	BOOT BATTERY CABLE	Service part / kit
076749	TANK COOLANT RECOVERY	Service part / kit
077043F	CONDUIT FLEX 1-1/4" (30" LG - 3.0L FORD & 3.9L CHRYSLER)	Service part / kit
077043J	CONDUIT FLEX 2.0" ID (36” LG)	Service part / kit
077992	NUT HEX LOCK M6-1.0 SS NY INS	Service part / kit
078115	WASHER SELF LOCKING DOME #4-40	Service part / kit
078115A	WASHER SELF LOCKING DOME #8-32	Service part / kit
080712	BRKT COOLANT RECOVERY TANK	Service part / kit
080762	BOLT U 3/8-16 X 2.62	Service part / kit
081008	GROMMET 1.25 X .25 X .75	Service part / kit
082573	SWITCH RKR DPST 125V SPD	Service part / kit
085917	WASHER LOCK 3/8 SS	Service part / kit
085918	NUT HEX 3/8-16 SSTL	Service part / kit
087233	RIVET POP .1875 X .450 SS	Service part / kit
087272	ASSY EXCITER 2.00" STK	Service part / kit
088775	WASHER FLAT 3/8 SS	Service part / kit
089514	FTG CMPR 3/8TUBE X 3/8 NPT W/FERL	Service part / kit
089685	GROMMET .75 X .12 X .50	Service part / kit
089961	FOAM STRIP 3/4"WIDE X 3/16"THK (294”LG)	Service part / kit
090152	ASSY BRIDGE RECTIFIER	Service part / kit
090283	CAP RADIATOR 13 PSI	Service part / kit
0912970094	ASSY WIRE 14 AWG 34.8" GRN/YEL	Service part / kit
0A1786	RETAINING COMPOUND	Service part / kit
0A2077	CB 0125A 2P 240V S BQ2 LL	Service part / kit
0A4121	VALVE PCV	Service part / kit
0A5062J	SPACER 9.5H 3.2 ID	Service part / kit
0A7822	LUG SLDLSS 600/250-1/0 X 1/4-28	Service part / kit
0A9457	DECAL NEUTRAL	Service part / kit
0C2266	SCREW PHTT M5-0.8 X 16 ZYC	Service part / kit
0C2428	SCREW PHTT #6-32 X 1/2 ZYC	Service part / kit
0C2454	SCREW THF M6-1 X 16 N WA Z/JS	Service part / kit
0C2634A	ASSEMBLY COVER ACCESS	Service part / kit
0C3397	FASTENER RATCHET	Service part / kit
0C3990	SCREW PHTT M4-0.7 X 10 ZYC	Service part / kit
0C9708	INSTR HYPOT TEST (NOT SHOWN)	Service part / kit
0D1509	DECAL INLET PRESSURE	Service part / kit
0D4698	BLOCK TERM 20A 6 X 3 X 1100V	Service part / kit
0D5466	BUS BAR NEUTRAL BLOCK 390	Service part / kit
0D5552	CB 0050A 3P 480V S ED4 LL	Service part / kit
0D5553	CB 0060A 3P 480V S ED4 LL	Service part / kit
0D5554	CB 0070A 3P 480V S ED4 LL	Service part / kit
0D5556	CB 0090A 3P 480V S ED4 LL	Service part / kit
0D5572	CB 0150A 3P 600V S FD6 LL	Service part / kit
0D5573	CB 0175A 3P 600V S FD6 LL	Service part / kit
0D5574	CB 0200A 3P 600V S FD6 LL	Service part / kit
0D5575	CB 0225A 3P 600V S FD6 LL	Service part / kit
0D5576	CB 0250A 3P 600V S FD6 LL	Service part / kit
0D5577	CB 0300A 3P 600V S JD6 LL	Service part / kit
0D6029	SCREW HHTT M6-1.0 X 16 ZYC	Service part / kit
0D7177V	DIODE BRIDGE 1P 35A 1000V	Service part / kit
0D7178T	Control Panel Fuse	Service part / kit
0D9693	CB 0125A 3P 480V S ED4 LL	Service part / kit
0D9832	SCREW HHC M12-1.75 X 75 SS	Service part / kit
0E0170B	EXHAUST BLANKET 850MM (C4)	Service part / kit
0E0170C	EXHAUST BLANKET 725MM (C4)	Service part / kit
0E0992A	PLUG EXPANSION 14 OD	Service part / kit
0E3161	ASSY PCB BOSCH GOV DRIVER	Service part / kit
0E3257	SCREW HWHTF M6-1.0 X 16	Service part / kit
0E3664	BASE, QN CIRCUIT BREAKER	Service part / kit
0E4392	ACTUATOR BOSCH 60 GOVERNOR	Service part / kit
0E4394	ACTUATOR BOSCH 40 GOVERNOR	Service part / kit
0E4395	ACTUATOR BOSCH 32 GOVERNOR	Service part / kit
0E4494	SWITCH RKR DPDT ON-OFF-ON	Service part / kit
0E5048A	FLEXPLATE HSB 3.9L CHRYSLER (1800RPM)	Service part / kit
0E5706	REAR BEARING CARRIER 390/DRCT	Service part / kit
0E6002	MTG TRACK BQ SIEMENS CB 3P	Service part / kit
0E6076	REVCOR FAN 12.63 X 2 W/PRESSDISK	Service part / kit
0E6376B	VENTURI 28 ID THROTTLE W/CHOKE	Service part / kit
0E6382B	VENTURI HOLDER W/40MM ACTUATOR	Service part / kit
0E6406	HOLDER VENTURI	Service part / kit
0E6703	COVER FLYWHEEL ACCESS	Service part / kit
0E6875A	RELAY 12VDC C FORM W/DIODE	Service part / kit
0E7254	MACH THERM ADAPTOR 3.9L CHRY	Service part / kit
0E7283	CB 0150A 2P 240V S QN2 LL	Service part / kit
0E7284	CB 0175A 2P S QN2 LL 240V	Service part / kit
0E7403B	FUSE ATO TYPE 10 AMP (RED)	Service part / kit
0E7403C	FUSE ATO TYPE 15 AMP (BLUE)	Service part / kit
0E7839	MACHINING, CARBURETOR ADAPTOR	Service part / kit
0E7854	CLUTCH COOLING FAN	Service part / kit
0E7855	TENSIONER W/BRACKET	Service part / kit
0E7890	BRKT CB MTG BACK	Service part / kit
0E7950	TUBE DIPSTICK 3.9L CHRYSLER	Service part / kit
0E7951	DIPSTICK OIL LEVEL 3.9L CHRYSLER	Service part / kit
0E7952	PULLEY CRANKSHAFT 3.9L CRYSLR (1800 RPM)	Service part / kit
0E7953	COIL IGNITION 3.9L CHRYSLER	Service part / kit
0E7954	CABLE IGN COIL 3.9L CHRYSLER	Service part / kit
0E7956	BRACKET IGNITION COIL	Service part / kit
0E7994	CB 0225A 240V 2P S QJ22	Service part / kit
0E8286	STREET EL 45D 1/2 NPT BRASS	Service part / kit
0E8336	MAKE 3.9L CHRYSLER ENGINE (1800 RPM)	Service part / kit
0E8445	BRACKET DIPSTICK TUBE	Service part / kit
0E8731	PLATE FLEX DISK SPACER (1800 RPM)	Service part / kit
0E8816	EXHAUST FLANGE 2" PIPE	Service part / kit
0E9295	ASSY THROTTLE 28MM	Service part / kit
0E9975	CAP VINYL 1/4" ID X 1" DP BLK	Service part / kit
0F0199	INSULATOR CB FD FRAME 30MIL	Service part / kit
0F0492	INSULATOR CB S (ED-3P)	Service part / kit
0F0738	MUFFLER 7" X 9"-(2) 2" IN/2.5" OUT	Service part / kit
0F1262	HOLDER FUSE WICKMANN 178.6150	Service part / kit
0F1263	ADPTR RH SIDE WICKMANN 178.6191	Service part / kit
0F1264	ADPTR LH SIDE WICKMANN 178.6192	Service part / kit
0F1444	HEAT SHIELD R/H SIDE	Service part / kit
0F1444A	HEAT SHEILD L/H SIDE	Service part / kit
0F1725C	ASSY PCB 2AMP 12V UL BATT CHGR	Service part / kit
0F1733	DECAL CUSTOMER CONNECT INSIDE	Service part / kit
0F1823A	ENCL HSB CONTROL PANEL	Service part / kit
0F1958	PLATE HARNESS CLAMP	Service part / kit
0F2230	SUPPORT ENGINE 3.9L LH & RH SD	Service part / kit
0F2353	INSULATOR CIRCUIT BR. JD/LD	Service part / kit
0F2606	HINGE CONTINUOUS H-PANEL	Service part / kit
0F2608	RADIATOR 598 X 568 X 49 CPL RH	Service part / kit
0F2627A	COVER CONTROL PANEL SIDE	Service part / kit
0F2694A	PULLEY CRANKSHAFT (3600 RPM)	Service part / kit
0F2785	SPLITTER LOWER C4	Service part / kit
0F2786	SLITTER C4	Service part / kit
0F2787	SUPPORT SLITTER C4	Service part / kit
0F2808A	EXHAUST OUTLET PIPE CPL	Service part / kit
0F2808B	PIPE EXHAUST MUFFLER OUT	Service part / kit
0F2820	FAN 22" DIA 10 BLADE	Service part / kit
0F2830	MUFFLER BRACKET STIFFENER	Service part / kit
0F2835	INNER DISCHARGE DUCT, C4	Service part / kit
0F2962	MUFFLER STRAP	Service part / kit
0F2981	MFLR 7" X 9" (2) 2" IN/2.5" OUT	Service part / kit
0F2982	ENG ADAPTER MACH 3.9L HSB NSPS	Service part / kit
0F3072	INSULATION RETAINMENT HANGER	Service part / kit
0F3078	COVER CONTROL PANEL	Service part / kit
0F3127	PIPE L/H SIDE 3.9L CPL	Service part / kit
0F3133	PIPE R/H SIDE 3.9L CPL	Service part / kit
0F3137	PAN CB CONN BOX	Service part / kit
0F3138	COVER CB CONN BOX	Service part / kit
0F3185	STRINGER SPLITTER C3	Service part / kit
0F3188	STAND RH CONTROL	Service part / kit
0F3189	STAND LH CONTROL	Service part / kit
0F3192	SUPPORT ANGLE PCB	Service part / kit
0F3203	WELDMENT RAD SUPPORT 3.9L C2	Service part / kit
0F3215	DECAL CONTROL HSB	Service part / kit
0F3217	SPACER DC ALTERNATOR PULLEY	Service part / kit
0F3270	MTG BASE 3.9L 40KW C2	Service part / kit
0F3312	DUCT INNER DISCHARGE TOP C2	Service part / kit
0F3313	DUCT INNER DISCHARGE C2	Service part / kit
0F3328	COVER ED CB SHORT STND	Service part / kit
0F3329	COVER JD/LD CB SHRT STAND	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 V-type?

The Generac V-type engine has an oil capacity of 3.8 liters.

What is the displacement of the Generac V-type?

The Generac V-type has a displacement of 3.9 liters with 10 cylinders.

Which generators use the Generac V-type engine?

The Generac V-type powers 17 generator set(s), including Generac 4.6L, Generac GenSpec007, Generac MQT100, Generac QT 3.9L 40kW, Generac QT 5.4L.

How often should you change the oil in the Generac V-type?

The Generac V-type oil change interval is every 1000 hours.

What is a common problem with the Generac V-type engine?

A commonly reported issue on generators using the Generac V-type is: No AC output from generator.. Cause: Defective Control Module circuit board. Fix: *Contact the nearest Authorized Dealer for assistance..