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Generac GT-760 Engine

Name: Generac GT-760 Engine
Brand: Generac

The Generac GT-760 is a 763 L 2-cylinder air-cooled engine rated at 3600 rpm, producing up to 27 kW. It powers generator sets from Generac, including the QUIETPACT 65, QUIETPACT 75, QuietPact 55 G and QuietPact 55 LP. It holds 1.5 L (0.4 gal) of oil.

Also known as: Generac GT-760

763.0 L

Displacement

Cylinders

3600 rpm

Rated speed

27 kW

Gross power

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

Engine specifications

Oil capacity	1.5 L
Displacement	763.0 L
Cylinders	2
Aspiration	Air-cooled
Rated speed	3600 rpm
Gross power	27 kW

Generator sets powered by this engine

Generac QUIETPACT 65 Generac QUIETPACT 75Generac QuietPact 55 GGenerac QuietPact 55 LPGenerac QuietPact 65 GGenerac QuietPact 65 LPGenerac QuietPact 75 GGenerac QuietPact 75 LP

How to read your Generac engine serial & model number →

Common problems

There is no AC output from the generator.
Cause: 1. Main-line circuit breaker open 2. Fault with vehicle circuit
Fix: 1. Reset line breaker to ON (or closed). 2. Reset and replace, if necessary.
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.
The engine will not crank.
Cause: 1. System control fuse blown 2. Loose corroded or defective battery cables as necessary. 3. Defective engine Start/Stop switch 4. Defective starter contactor 5. Defective starter motor 6. Low or defective battery 7. Defective engine control board
Fix: 1. Replace fuse. 2. Tighten, clean, or replace, as necessary. 3. Replace Start/Stop switch. 4. Replace contactor. 5. Replace starter motor. 6. Charge or replace battery. 7. Replace control board.
The engine starts, but shuts down when the Start/Stop switch is released.
Cause: 1. Low engine oil level 2. Overheated engine 3. Defective Start/Stop Switch 4. Defective low-oil pressure switch 5. Defective high-coolant temperature switch 6. No AC output 7. Defective engine control board
Fix: 1. Check oil and add oil, as needed. 2. Check cooling system for leaks. 3. Disconnect Remote Harness on panel or remote Start/Stop Check/Replace Start/Stop Switch 4. Replace pressure switch. 5. Replace temperature switch. 6. Contact a Generac Authorized Service Dealer 7. Replace control board.
The engine starts hard and runs rough.
Cause: 1. Plugged or damaged air filter 2. Defective fuel pump (FP) 3. Plugged fuel filter or fuel line 4. Water in fuel
Fix: 1. Check, clean, or replace, as needed. 2. Repair or replace fuel pump. 3. Clean or replace fuel filter or line. 4. Drain fuel system and refill.
The engine cranks but will not start.
Cause: 1. Vehicle fuel shutoff valve closed 2. Out of fuel 3. Defective fuel solenoid (FS) 4. Defective fuel pump (FP) 5. Open #14 wire from engine control board insulation of #14 wires. 6. Plugged fuel filter or fuel line 7. Engine mechanical parts failure
Fix: 1. Open valve, if so equipped. 2. Replenish fuel. 3. Replace solenoid. 4. Repair or replace fuel pump. 5. Check connections and insulation of #14 wires. 6. Clean or replace fuel filter or line. 7. Repair or replace parts.
No Battery Charge DC output.
Fix: 1. Battery posts are corroded. 1. Clean battery posts. 2. Battery cable is bad. 2. Replace cable. 3. Battery is defective. 3. Check battery condition; replace if defective. 4. Receptacle is bad. 4. Contact Authorized Service Facility.
Engine “hunts” or falters.
Fix: 1. Choke is opened too soon. 1. Move choke to halfway position until engine runs smoothly. 2. Carburetor is running too rich or too lean. 2. Contact Authorized Service Facility.
Engine will not start; or starts and runs rough.
Fix: 1. Dirty air cleaner. 1. Clean or replace air cleaner. 2. Out of gasoline. 2. Fill fuel tank. 3. Stale gasoline. 3. Drain fuel tank and fill with fresh fuel. 4. Spark plug wire not connected to spark plug. 4. Connect wire to spark plug. 5. Bad spark plug. 5. Replace spark plug. 6. Water in gasoline. 6. Drain fuel tank; fill with fresh fuel. 7. Overchoking. 7. Put choke knob to No Choke position. 8. Low oil level. 8. Fill crankcase to proper level. 9. Excessive rich fuel mixture. 9. Contact Authorized Service Facility. 10. Intake valve stuck open or closed. 10. Contact Authorized Service Facility. 11. Engine has lost compression. 11. Contact Authorized Service Facility.
Engine will not crank.
Fix: 10 amp fuse at rear of generator control panel has melted open. Replace fuse with only an identical 10-amp replacement fuse.
Engine shuts down during operation.
Fix: 1. Out of gasoline. 1. Fill fuel tank. 2. Low oil level. 2. Fill crankcase to proper level. 3. Fault in engine. 3. Contact Authorized Service Facility.
Engine runs good but bogs down when loads are connected.
Fix: 1. Short circuit in a connected load. 1. Disconnect shorted electrical load. 2. Generator is overloaded. 2. See “Don’t Overload the Generator” on page 9. 3. Engine speed is too slow. 3. Contact Authorized Service Facility. 4. Shorted generator circuit. 4. Contact Authorized Service Facility.
Engine lacks power.
Fix: 1. Load is too high. 1. See “Don’t Overload the Generator” on page 9. 2. Dirty air filter. 2. Replace air filter. 3. Engine needs to be serviced. 3. Contact Authorized Service Facility.
Engine is running, but no AC output is available.
Fix: 1. Circuit breaker is open. 1. Reset circuit breaker. 2. Poor connection or defective cord set. 2. Check and repair. 3. Connected device is bad. 3. Connect another device that is in good condition. 4. Fault in generator. 4. Contact Authorized Service Facility.

Compiled from service & troubleshooting documentation across every generator set that uses the Generac GT-760.

Maintenance schedule

Item	Spec	Capacity	Part #	Interval
Air filter	Clean the foam pre-cleaner every three months or every 100 hours of operation, whichever occurs first. Replace the paper air filter element after every 250 hours of operation.		087769	250 hr	Amazon $16.88 eBay
Fuel filter			087769	400 hr	Amazon $16.88 eBay
Oil filter			070185	100 hr	Amazon $28.95 eBay $30.00 FridayParts $45.99
Belt			0C1112		eBay $44.99
Oil		1.8 L/1.9QT	—	400 hr
Spark plug			072347	500 hr	Amazon $34.90 eBay $1.99

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		Check before each use / at least every 8 hours
Oil and oil filter	Change	8 hr		First service — First 8 hours of operation
Oil level	Check	8 hr		Every 8 h / daily
Foam Precleaner	Clean	25 hr	3 mo	Every three months or every 25 hours, whichever occurs first
Spark Arrestor	Clean	50 hr	12 mo	Inspect and clean every 50 hours or once each year, whichever comes first
Air Pre-filter	Clean	100 hr		From RV Generator Service Interval list
Air pre-filter (foam precleaner)	Clean	100 hr	3 mo	Every three months or every 100 hours, whichever occurs first
Engine Oil and Oil Filter	Change	100 hr		First service — Every 100 operating hours; more often under heavy load or high ambient temperature
Engine cooling system	Inspect	100 hr	1 mo	First service — After 25-H break-in; every 100 H/M
Engine oil	Change	100 hr		First service — Change after first 25 hours, then every 100 hours
Exhaust system	Inspect	100 hr	1 mo
Oil filter	Change	250 hr	6 mo	First service — Change after first 25 hours, then every 100 hours
Oil line leakage	Inspect	100 hr		To be completed by a Generac Authorized Service Dealer
Spark Plug	Clean	100 hr		Clean plug and reset gap every 100 hours
Spark Plugs	Inspect	100 hr		RV Generator Service Interval list
Clean out Muffler/Spark Arrestor	Clean	150 hr	12 mo	Every 150 H / Yearly
Battery charge and condition	Test	250 hr	6 mo	Weekly and every 250 H/6M
Charge and condition (battery)	Test	250 hr	6 mo	Weekly and every 250 H / 6 M
Enclosure louvers	Clean	250 hr	6 mo
Fuel Filter	Replace	400 hr	12 mo	To be completed by a Generac Authorized Service Dealer
Fuel lines and connections	Inspect	250 hr	6 mo	First service — After 25-H break-in; to be completed by a Generac Authorized Service Dealer
Oil	Change	250 hr	6 mo	First service — After 25-H break-in
Paper air filter element	Replace	250 hr
Air filter	Replace	500 hr
Coolant	Change	500 hr	12 mo	Every 500 H/Y
Muffler / spark arrestor	Clean	500 hr
Spark plugs	Replace	500 hr
Valve Lash	Adjust	500 hr		First service — 1st 50 hours, then every 500 hours
Compression	Test	750 hr		Authorized Service Dealer
Cylinder head	Adjust	750 hr		Retorque
Exhaust manifold	Adjust	750 hr		Retorque
Fan/alternator belts tension and condition	Inspect	750 hr		Replace as needed
Governor	Adjust	750 hr		Authorized Service Dealer
Injection system	Adjust	750 hr		Authorized Service Dealer
Injection system	Inspect	750 hr
Intake manifold	Adjust	750 hr		Retorque
Retorque Exhaust Manifold	Adjust	750 hr		Authorized Service Dealer
Retorque cylinder head	Adjust	750 hr		Authorized Service Dealer
Retorque intake manifold	Adjust	750 hr		Authorized Service Dealer
Safety devices	Test	750 hr		Authorized Service Dealer

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	Clearance between fuel line and exhaust system	2	inches
Clearance	Exhaust clearance to combustible material	3	inches
Clearance	Exhaust system to combustible material	3	inch
Gap	Spark plug gap	0.030	inch (0.8 mm)
Gap	Spark plug gap	0.040	inch
Gap	Spark plug gap	1.02	mm
Other	AC voltage regulation	115	volts	at 60 Hertz AC frequency
Other	Compression ratio	8.6 to 1
Other	Minimum cooling air inlet opening	150	square inches	unrestricted
Other	Rated horsepower	13	hp	@ 1,950 rpm
Other	Voltage-to-frequency ratio	2-to-1		at 60 Hz, 120 volts
Pressure	Engine oil pressure	29-71	psi
Pressure	Fuel pump outlet pressure	2.0 to 3.5	psi
Pressure	LP fuel system leak test pressure	90	psi
Pressure	LP gas pressure at gaseous fuel solenoid valve and secondary regulator inlet	11	inches water column	optimum
Pressure	LP gas pressure at inlet to gaseous fuel solenoid and secondary regulator	11	inches water column
Pressure	LP gas pressure to solenoid valve	14	inches water column	do NOT exceed
Pressure	LP gas system leak test pressure	90	psi (620 kPa)	not less than, test with soap and water solution
Pressure	LP primary regulator maximum outlet pressure	14	inches water column	do not exceed
Pressure	Low oil pressure switch actuation	10	psi	approximately
Pressure	Low oil pressure switch setpoint	10	psi	approximate
Pressure	Low oil pressure switch trip point	below 10	psi	switch closes below this pressure
Resistance	Rotor minimum insulation resistance	1.5	megohms
Resistance	Stator minimum insulation resistance (120 VAC)	1.12	megohms	per formula (rated volts/1000)+1
Speed	Engine governor speed	2200	rpm
Speed	Engine governor speed	2571	rpm
Speed	Engine operating speed	1950	rpm
Speed	Engine rated speed	1950	rpm
Speed	No-load frequency	62	Hz	governor set point, no electrical load
Speed	Overspeed shutdown (alternator speed)	4320	rpm	about 72 Hertz
Speed	Overspeed shutdown alternator speed	4320	rpm	approximately
Speed	Overspeed shutdown frequency	72	Hz	approximately
Speed	Rated horsepower	27	hp	at 3600 rpm
Speed	Rated rotor speed	3600	rpm
Speed	Rotor speed at no load	3780	rpm
Temperature	Exhaust heat rise limit at combustible material	117	deg. F	above ambient air temperature
Temperature	High coolant temperature switch actuation	110	degC	approximately
Temperature	High coolant temperature switch setpoint	115	°C	approximate (240°F)
Temperature	High temperature switch actuation (LP models)	284	deg. F
Temperature	High temperature switch actuation (gasoline models)	270	deg. F
Temperature	High temperature switch setting (LP models)	284	°F (140°C)	closes on high temp
Temperature	High temperature switch setting (gasoline models)	270	°F (132°C)	closes on high temp
Temperature	Valve adjustment engine temperature	60 to 80	deg. F
Torque	Crankcase breather screws	5-8	ft-lbs
Torque	Governor clamp bolt	70	inch-pounds (8 N-m)
Torque	Rocker arm jam nut	174	inch-pounds
Valve clearance	Exhaust Valve	0.002-0.004	inch	engine at room temperature, piston at TDC compression
Valve clearance	Intake Valve	0.002-0.004	inch	engine at room temperature, piston at TDC compression
Valve clearance	Valve clearance	0.002 - 0.004	inch	engine cool
Valve clearance	Valve clearance	0.05 - 0.1	mm	engine cool
Valve clearance	Valve clearance (both valves)	0.002-0.004	inch (0.05-0.1 mm)	engine at room temperature, piston at TDC of compression stroke
Voltage	Battery cable voltage drop	0.12	volts per 100 amperes of cranking current	maximum, for best cold weather starting
Voltage	Battery charge voltage	14	VDC
Voltage	Generator AC output voltage regulation	115	volts	at 60 Hertz
Voltage	No-Load AC output voltage	124	VAC	at 62.5 Hz no-load

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 mixture of low silicate ethylene glycol base antifreeze and soft water			5.3 L	Use only soft water and low silicate antifreeze
Coolant	50:50 mixture of low silicate ethylene glycol base antifreeze and soft water			5.3 L	Use only soft water and low silicate antifreeze; do not use chromate base rust inhibitor or high-silicate additives
Engine oil	5W-30 or 5W-20				Data decal (SAE VISCOSITY) alternate viscosity
Engine oil	SAE 10W-30	API classification 'For Service SF'		1.8 liters	Crankcase capacity 1.8 liters or 1.9 quarts with oil filter change; do not pour in additives
Engine oil	SAE 30 or 10W-30				Data decal (SAE VISCOSITY); temperature 40°F and higher
Engine oil	SAE 30 or SAE 10W-30	API SF, SG, SH or SJ			During summer months (40 deg. F and higher). DO NOT USE SAE 10W-40. DO NOT use special additives.
Engine oil	SAE 5W-20 or SAE 5W-30	API 'For Service CC'	below 4°C		For below 40 F (4.4 C)
Engine oil	SAE 5W-30	API classification 'For Service SF'			Used to refill crankcase during out-of-service storage
Engine oil	SAE 5W-30 or SAE 5W-20	API SF, SG, SH or SJ			During winter months (40 deg. F to -20 deg. F)
Engine oil	Synthetic 5W-20 or 5W-30	API SF or SG		1.5 Qts w/ filter change (1.2 Qts w/o)	Below 40°F
Engine oil	SAE 10W-30 or SAE 30	API 'For Service CC'	4°C to 38°C		For 40 to 100 F (4.4 to 38 C)
Engine oil	SAE 15W-40 or SAE 40	API 'For Service CC'	above 38°C	3.5 L	For ambient above 100 F (38 C); do not use special additives
Fuel	High quality UNLEADED gasoline				Leaded REGULAR grade acceptable substitute; alcohol content must not exceed 10 percent ethanol; do NOT use methanol
Fuel	LP gas (vapor withdrawal only)				Recommended minimum gas flow rate for air-cooled generators is 67 cubic feet per hour
Fuel	No. 1D or No. 2D diesel	ASTM; minimum Cetane number 40			Protect against gelling at low ambient temperatures
Fuel	No. 1D or No. 2D diesel fuel	ASTM; minimum Cetane number of 40			Use clean, fresh diesel fuel; never use dirty or contaminated fuel
Fuel	Regular unleaded gasoline			16.0 U.S. gallons	Do not use premium gasoline; do not mix oil with gasoline
Fuel	Unleaded gasoline (high quality); leaded REGULAR grade is an acceptable substitute	max 10 percent ethanol if alcohol present; DO NOT use methanol			Remove alcohol-containing fuel during storage
Other	LP (liquid propane) gas				Vapor withdrawal type systems only

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 Valve Clearance adjustment

⚠ Hold the rocker arm jam nut in place as the pivot ball stud is turned.

⚠ Start all four screws before tightening.

Tools: Feeler gauge, 10mm allen wrench, #2 or #3 Phillips screwdriver, Large socket and socket wrench

Make sure the engine is cool and at 60 deg to 80 deg F.
Remove spark plug wires and position them away from plugs.
Remove spark plugs.
Rotate the engine clockwise with a socket on the flywheel nut to bring the piston to Top Dead Center of its compression stroke.
Remove the four screws attaching the valve cover.
Loosen the rocker jam nut and use a 10 mm allen wrench to turn the pivot ball stud while checking clearance with a feeler gauge.
When clearance is correct, hold the pivot ball stud and tighten the rocker arm jam nut to 174 in/lbs.
Recheck valve clearance after tightening.
Install a new valve cover gasket and re-attach the valve cover.
Install spark plugs and re-attach the spark plug wires.

Check and Adjust Valve Clearance adjustment

Tools: 10mm allen wrench, feeler gauge, crow's foot torque wrench

Adjust valve clearance with engine at room temperature, piston at TDC of compression stroke.
Loosen rocker arm jam nut, use 10mm allen wrench to turn pivot ball stud while checking clearance with feeler gauge.
Set intake valve clearance 0.002-0.004 in and exhaust valve clearance 0.002-0.004 in.
Hold pivot ball stud with allen wrench and tighten rocker arm jam nut to 174 inch-pounds with a crow's foot.
Recheck valve clearance after tightening jam nut.
Install rocker arm cover with new gasket and retain with four screws.

Governor Adjustment adjustment

Tools: Pliers

Loosen governor clamp bolt.
Push spring end of governor lever clockwise to wide open throttle position.
Hold governor lever at wide open throttle and rotate governor shaft fully clockwise with pliers.
Tighten governor clamp bolt to 70 inch-pounds (8 N-m) while holding shaft and lever.
Start engine, let stabilize and warm up at no-load.
Turn adjuster nut to obtain 62 Hertz frequency reading.
Reposition governor spring in lever slot if droop is excessive or for greater stability.
Recheck frequency and readjust adjuster nut to obtain 62 Hertz at no-load.
Check AC voltage reading; adjust voltage regulator if incorrect.

Voltage Regulator Adjustment adjustment

⚠ Adjustment must be done only when unit is running at correct governed no-load speed

Run unit at no-load with frequency set to 62.5 Hz.
Slowly turn voltage adjust pot on voltage regulator until 124 VAC is measured.
If voltage is not adjustable, proceed to troubleshooting Problem 2.

Stator Short-to-Ground Insulation Test diagnostic

⚠ Insulation resistance testers are a source of high and dangerous electrical voltage

Tools: Hi-pot tester or megohmmeter

Disconnect and isolate all stator leads including sensing, excitation, battery charge and power leads.
Connect terminal ends of all stator leads together.
Connect tester leads across all stator leads and to frame ground on stator can, apply 1500 volts for no more than 1 second.
If breakdown indicated, clean and dry stator and re-test; replace stator if it fails second test.

Battery Cable Connections installation

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

Connect cable from POSITIVE battery post to insulated lug on unit frame.
Connect cable from NEGATIVE battery post to vehicle frame ground.
Connect a cable from vehicle frame ground to negative post on generator frame.
Ensure connectors are clean and tight.

Generator Conversion to 120 Volts Only, Dual Circuits installation

⚠ Do not connect loads in excess of circuit breaker ratings.

⚠ Recommended to be performed by a Generac Authorized Service Dealer.

Tools: 12 AWG jumper wire

Disconnect battery power from the generator.
Re-route stator lead 44 to ground stud previously occupied by lead 33.
Move #18 AWG wire #44 from top of CB1A to top of CB1; renumber as #11.
Re-route stator lead 33 to line side terminal on CB1 (renamed CB1A).
Renumber ground wire 33 as wire 44.
Renumber wire 44A as 33A.
Connect a 12 AWG jumper between line breakers CB1 and CB1A.
Remove the tie bar between the two line breaker switch handles.

LP Gas System Leakage Test installation

⚠ DO NOT USE ANY FLAME TO TEST FOR LEAKS.

Tools: soap and water solution, separate 12 volt DC source

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

Remote Start/Stop Connections installation

If six-wire remote connector is visible below control panel, skip to step 5.
Remove electrical access panel located below REMOTE knockout.
Remove REMOTE knockout without damaging wiring behind it.
Feed remote connector through hole and fit supplied grommet.
Wire remote harness (Part # C6712C) to coach remote start panel.
Plug remote harness into mating remote connector on generator.

Testing Under Load (Post Installation) installation

⚠ You must not allow the unit to overheat during prolonged operation.

Apply electrical loads equal to about 75 to 100 percent of the unit's rated wattage/amperage capacity.
Let the unit run at least 30 minutes with load applied.
Check that the unit is not running excessively hot and that adequate cooling airflow is available.

Battery Maintenance maintenance

⚠ Do not use tap water in batteries.

⚠ Do not use jumper cables to crank the generator.

Inspect battery posts and cables for tightness and corrosion; tighten and clean as necessary.
Check fluid level of unsealed batteries; fill with distilled water only.
Have state of charge and condition checked by a Generac Authorized Service Dealer.

Changing the Engine Oil and/or Oil Filter maintenance

⚠ Do not fill above the FULL mark.

Run engine until warm (at least five minutes), then shut off.
Remove front service door by retracting two latches.
Remove the air filter.
Remove oil drain plug; drain oil into suitable container.
Replace oil drain plug; skip to step 8 if changing oil only.
Remove old oil filter by turning counterclockwise.
Coat new filter gasket with clean oil; install hand-tight then 3/4 to one turn more.
Refill with recommended oil; start engine and check for leaks.

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	120 VAC loads only - line to neutral	T1 (Red) and T3 (Black) hot; T2 (White) grounded neutral; green ground wire	One load with a maximum total wattage requirement equal to the generator's rated power output, with 120V across the generator output terminals
120	1	Line T1 (Red) to T2 (White) via circuit breaker CB1	T1 (Red), T2 (White)	120V single-phase 60 Hz loads
120	1	Line T3 (Black) to T2 (White) via circuit breaker CB2	T3 (Black), T2 (White)	120V single-phase 60 Hz loads; total unit load must not exceed maximum generator rating
120	Single	120 volts only - dual circuits	Re-route stator lead 44 to ground stud previously occupied by 33; re-route lead 33 to line side of CB1; renumber ground wire 33 as 44; renumber 44A as 33A	Requires 12 AWG jumper between CB1 and CB1A; remove tie bar between breaker handles
120	Single	120 volts only - dual circuits (conversion)	Stator lead 33 rerouted to line side of CB1A; stator lead 44 moved to ground stud; wire #44 renumbered #11; ground wire 33 renumbered 44; wire 44A renumbered 33A	Two stator windings, each protected by line breakers CB1 and CB1A (trip rating 35 amps); neutral (T2 white) is grounded
120	single phase	120 VAC loads only - one load with maximum total wattage equal to the generator's rated power output; 120V across the generator output terminals	T1 (red), T2 (white), T3 (black), green ground; grounded neutral	Figure 1.1/5.1 - Connection for 120 Volts Only
120 VAC only	1-Phase	Single load, 120V across output terminals	11P/22P, 33/44	Max wattage equal to rated output
120/240	1	120/240 VAC loads - dual voltage output	T1 (Red), T2 (White), T3 (Black) plus green ground wire	One 240V load at rated output, OR two separate 120V loads each at half rated output. Loads across T1-T2 and T3-T2 must not exceed ratings. Unit is reconnectable to 120 and/or 240 volts; not RVIA/ANSI listed when reconnected for dual voltage.
120/240	Single	Dual voltage - stator power windings connected in series (factory shipped)	Lead 11/11A to T1 (Red); lead 44/44A to T3 (Black); leads 22 and 33 grounded to T2 NEUTRAL (White); green ground lead	Tie bar connects the two switch handles on line breaker CB1
120/240	Single	Series (dual voltage), factory default	11/11A to T1 (red); 44/44A to T3 (black); 22 and 33 grounded to T2 neutral (white)	Four-position terminal block; tie bar connects CB1 and CB1A handles; CB1 and CB1A trip rating 35 A
120/240	single phase	120/240 VAC loads - one load with maximum total wattage equal to rated output at 240V; or two separate loads each up to half rated output at 120V	T1 (red), T3 (black) are 'hot'; T2 (white) is the grounded neutral; green lead connects to ground	Figure 1.2/5.3 - Connection for 120/240 Volts; units not listed per RVIA/ANSI when reconnected for dual voltage output
120/240 VAC	1-Phase	Dual voltage output, two hot leads T1(11P/44 red) T3(33 black), neutral T2 (22P/33 white)	11P, 22P, 33, 44	No longer RVIA listed if reconnected for dual voltage

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

Aftermarket parts that fit this engine

A0000501971 FridayParts $109.99 0G3224TA FridayParts $29.99 0G3224TB FridayParts $29.99 FP-XP-0033262

Parts listed by aftermarket suppliers as fitting this engine — leads compiled from supplier catalogs; verify the exact part for your serial number.

Common questions

What is the oil capacity of the Generac GT-760?

The Generac GT-760 engine has an oil capacity of 1.5 liters.

What is the displacement of the Generac GT-760?

The Generac GT-760 has a displacement of 763.0 liters with 2 cylinders.

Which generators use the Generac GT-760 engine?

The Generac GT-760 powers 8 generator set(s), including Generac QUIETPACT 65, Generac QUIETPACT 75, Generac QuietPact 55 G, Generac QuietPact 55 LP, Generac QuietPact 65 G.

How often should you change the oil in the Generac GT-760?

The Generac GT-760 oil change interval is every 400 hours.

What is a common problem with the Generac GT-760 engine?

A commonly reported issue on generators using the Generac GT-760 is: There is no AC output from the generator.. Cause: 1. Main-line circuit breaker open 2. Fault with vehicle circuit. Fix: 1. Reset line breaker to ON (or closed). 2. Reset and replace, if necessary..