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Generac GForce Engine

The Generac GForce is a 1 L ohv engine rated at 3600 rpm. It powers generator sets from Generac, including the 7029, 7031, 7035 and 7171.

Also known as: Generac GForce

0.999 L

Displacement

3600 rpm

Rated speed

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

Engine specifications

Displacement	0.999 L
Aspiration	OHV
Rated speed	3600 rpm

Generator sets powered by this engine

Generac 7029 Generac 7031 Generac 7035 Generac 7171 Generac 7179 Generac 7180 Generac 7181 Generac 7223 Generac 7226 Generac GUARDIAN 16 Generac Guardian 10 Generac Guardian 13 Generac Guardian Series 7077Generac XC6500

How to read your Generac engine serial & model number →

Common problems

Unit will not start in AUTO with utility loss
Cause: Start delay countdown
Fix: If the start up delay is greater than expected, contact servicing dealer to adjust from 2 to 1500 seconds.
Engine cranks but won't start
Cause: Fuel supply and pressure faulty
Fix: Test 66 - Check fuel supply and pressure; find and correct cause of no fuel or low pressure
Generator produces zero voltage or residual voltage (12-20 kW)
Cause: Main circuit breaker open or failed
Fix: Reset to "ON" or replace if bad
Engine starts hard and runs rough / lacks power / backfires
Cause: Fuel supply and pressure faulty
Fix: Test 66 - Check fuel supply and pressure; find and correct cause of no fuel or low pressure
Unit consumes large amounts of oil
Cause: Engine over filled with oil
Fix: Adjust oil to proper level
Engine will not crank when AUTO-OFF-MANUAL switch is set to "MANUAL"
Cause: Battery faulty
Fix: Test 61 - Check battery; replace
Engine starts hard and runs rough
Cause: Plugged or damaged air cleaner
Fix: Inspect and clean air cleaner
No transfer to standby after utility source failure
Cause: Generator MLCB (generator disconnect) is OFF (OPEN)
Fix: Set generator MLCB (generator disconnect) to ON (CLOSED)
Engine cranks but will not start
Cause: No fuel
Fix: Replenish fuel / turn on fuel valve
Unit will not start in AUTO with utility loss. NOT ACTIVATED
Cause: Unit not activated
Fix: Refer to activation section in owners manual.
Engine will not crank
Cause: Blown fuse
Fix: Correct short circuit condition by replacing 7.5 A fuse in generator control panel; Contact an IASD if fuse continues to blow
Yellow LED illuminated in any state LOW BATTERY
Fix: Clear alarm. Check the battery using the control panel under the MAIN menu using the BATTERY MENU option. If it states battery is GOOD contact servicing dealer. If it states CHECK BATTERY replace the battery.
Unit will not start in AUTO with utility loss — LED RED LOW OIL PRESSURE
Cause: Check LEDs / screen for alarms
Fix: Check oil level and add oil as needed. If oil level is correct, contact an IASD
Voltage and Frequency Drop Excessively When Loads Are Applied
Cause: Overload condition; if reconfigured to LP gas, improper procedure followed; stepper motor control; shorted condition in a connected load or in one of the load circuits; stator AC power windings; engine condition
Fix: Discontinue testing; reduce loads to unit's rated capacity; verify that proper procedure was followed (refer to installation manual); repair or replace; look for a shorted condition in a connected load or in one of the load circuits; Test 7 – Check Stator AC Power Windings; Test 16 – Check Engine Condition; go to Problem 18 – Engine Starts Hard and Runs Rough/Lacks Power Section 4.3
Unit will not start in AUTO with utility loss — LED: RED LOW OIL PRESSURE
Fix: Check oil level and add oil as needed. If oil level is correct, contact an IASD.

Compiled from service & troubleshooting documentation across every generator set that uses the Generac GForce.

Maintenance schedule

Item	Spec	Capacity	Part #	Interval
Air filter	Replace air filter and precleaner		—	100 hr
Fuel filter	Replace fuel filter		—	100 hr
Oil filter	Replace with new oil filter		—	25 hr
Belt	Replace belt		—	100 hr
Oil	Detergent oil SF-SG	1.2 L	—	25 hr
Spark plug	Champion RC12YC or Torch F7RTC		—	100 hr

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
Oil level	Check	24 hr	1 mo	Monthly or 24 hours of continuous operation
Aceite del motor	Change	25 hr		First service — Después del período de asentamiento de 25 horas, se recomienda utilizar el aceite 5W-20 propiedad de Generac para uso continuo.
Oil	Change	200 hr	24 mo	First service — After the first 25 hours of operation
Oil filter	Change	200 hr	24 mo	First service — After the first 25 hours of operation
Valve clearance	Check	400 hr		First service — After the first 25 hours of operation
Engine governor oil level	Check	50 hr		Check prior to initial use and every 50 operating hours thereafter.
Engine oil and filter	Replace	100 hr	12 mo	First service — After first 25 hours; then every 100 hours or 1 year. Cold weather (<4.4°C) or continuous hot (>29.4°C): every 100 hours or 1 year
Coolant Level and Hoses	Check	125 hr	12 mo	Schedule A; also daily if running continuously
Enclosure Louvers	Check	125 hr	12 mo	Schedule A; also daily if running continuously
Fuel Lines	Check	125 hr	12 mo	Schedule A; also daily if running continuously
Lubricating Oil Level and Drain Hose	Check	125 hr	12 mo	Schedule A; also daily if running continuously
Lubricating Oil and Oil Filter	Replace	125 hr	12 mo	First service — Schedule A
Radiator for Clogging	Check	125 hr	12 mo	Schedule A; also daily if running continuously
Aceite de motor y filtro de aceite	Change	200 hr	24 mo	First service — Programa de mantenimiento A
Air cleaner	Inspect	200 hr		2 years or 200 hours; replace as necessary
Batería (condición, nivel de electrolito y estado de carga)	Check	200 hr	24 mo	Programa de mantenimiento A
Battery condition	Check	200 hr	24 mo	Schedule A.
Battery condition and charge	Check	200 hr	24 mo	Schedule A maintenance
Change Air Filter	Change	200 hr		200 hours or 2 years
Change Oil & Filter	Change	200 hr		200 hours or 2 years; 20kW: 100 hours or 2 years
Complete Tune-Up	Other	200 hr	24 mo	Independent Authorized Dealer must perform; 2 years or 200 hours
Engine oil	Change	200 hr	24 mo	First service — Up to a 2 year/200 hour oil change interval.
Huile à moteur et filtre à huile	Change	200 hr	24 mo	First service — Calendrier A: tous les deux ans ou toutes les 200 heures. Changer l'huile et le filtre après les 25 premières heures. En conditions froides (moins de 4,4 °C/40 °F) ou fonctionnant en continu à plus de 29,4 °C/85 °F, changer annuellement ou toutes les 100 heures.
Inspect Air Filter	Inspect	200 hr		200 hours or 2 years
Inspect Spark Plugs	Inspect	200 hr		200 hours or 2 years
Óleo lubrificante e filtro de óleo	Change	200 hr	24 mo	First service — Trocar após as primeiras 25 horas; Programação A (2 anos ou 200 h); em clima frio (<4,4 °C) ou quente contínuo (>29,4 °C) anualmente ou 100 h
Aceite del motor y filtro de aceite	Replace	400 hr	48 mo	First service — Programa B: cada cuatro años o 400 horas.
Air cleaner	Clean	400 hr		Clean or replace as necessary; R = Replace as Necessary; 400 hours
Air filter	Replace	400 hr	48 mo	Schedule B maintenance
Battery condition, electrolyte level, and state of charge	Inspect	400 hr	48 mo	Schedule B
Bougies d'allumage	Clean	400 hr	48 mo	Nettoyer les bougies, vérifier l'écartement ou les remplacer. Calendrier A et Calendrier B.
Bujía(s)	Replace	400 hr	48 mo	Programa B: cada cuatro años o 400 horas.
Bujías	Replace	400 hr	48 mo	Programa B; limpiar, comprobar separación y sustituir
Change spark Plugs	Change	400 hr		400 hours or 10 years
Engine air filter	Replace	400 hr	48 mo	Schedule B; emissions-critical maintenance
Engine oil and oil filter	Change	400 hr	48 mo	First service — Schedule B.
Engine oil and oil filter	Replace	400 hr	48 mo	First service — Schedule B
Filtre à air du moteur	Replace	400 hr	48 mo	Calendrier B: tous les quatre ans ou toutes les 400 heures.
Filtro de aire del motor	Replace	400 hr	48 mo	Programa de mantenimiento B
Filtro de ar do motor	Replace	400 hr	48 mo	Programação B (4 anos ou 400 h)

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	Belt deflection	3/8 - 5/8	in	22 Ibs (10 kgf) force midway between water pump and alternator pulleys
Clearance	Belt deflection	7.6 - 12.7	mm	22 Ibs (10 kgf) force midway between water pump and alternator pulleys
Gap	Armature Air Gap	0.008-0.012	inch
Gap	Breaker Point Gap	0.018-0.022	inch
Gap	Folga da vela de ignição	0,020	pol
Gap	Folga da vela de ignição	0,040	pol
Gap	Folga da vela de ignição	0,508	mm
Gap	Folga da vela de ignição	1,02	mm
Gap	Ignition magneto (armature) air gap	0.008-0.012	inch (0.20-0.30 mm)
Gap	Ignition magneto air gap	0.008-0.012	inch
Gap	Ignition magneto air gap	0.008-0.012 inch (0.20-0.30 mm)	gap	V-twin engines; fixed non-adjustable on single cylinder
Gap	Ignition magneto air gap (V-twin)	0.008-0.012 inch (0.20-0.30 mm)	inch / mm
Gap	Ignition magneto gap to flywheel (replacement)	0.010 inch	inch
Gap	Magneto gap between flywheel	0.010	inch
Gap	Separación de electrodos de bujía (11 kW)	0.030	in (0.76 mm)
Gap	Separación de electrodos de bujía (16/20/22 kW)	0.040	in (1.02 mm)
Gap	Separación de electrodos de bujía (9 kW)	0.020	in (0.508 mm)
Gap	Separación de las bujías	0.508	mm (0.020 pulg.)
Gap	Separación de las bujías	1.02	mm (0.040 pulg.)
Gap	Spark Plug Gap	0.030	in (0.76 mm)	11 kW (GTH-530)
Gap	Spark Plug Gap	0.031-0.035	inch
Gap	Spark Plug Gap (1.5L engines, 25/30 kW)	0.9	mm
Gap	Spark Plug Gap (2.4L engines, 22/27/36/45 kW)	1.07-1.17	mm
Gap	Spark Plug Gap (32/38 kW and 60 kW)	0.71	mm
Gap	Spark plug gap	0.020	in (0.508 mm)
Gap	Spark plug gap	0.020 in (0.508 mm)	in (mm)
Gap	Spark plug gap	0.040	in (1.02 mm)
Gap	Spark plug gap	0.040 in (1.02 mm)	in (mm)
Gap	Spark plug gap	0.508	mm
Gap	Spark plug gap	0.76	mm (0.030 in)
Gap	Spark plug gap	0.76 mm (0.030 inch)	gap	410 cc and 530 cc engines
Gap	Spark plug gap	1.02	mm (0.040 inch)
Gap	Spark plug gap	1.02 mm (0.040 inch)	gap	990 cc and 999 cc engines
Gap	Spark plug gap (10 kW)	0.020	in (0.508 mm)
Gap	Spark plug gap (11 kW)	0.030	in (0.76 mm)
Gap	Spark plug gap (12/14/16/17/20 kW)	1.02	mm
Gap	Spark plug gap (14-24 kW)	0.040	in (1.02 mm)
Gap	Spark plug gap (14–24 kW)	0.040	in (1.02 mm)	cold
Gap	Spark plug gap (16/20/22 kW)	0.040	in (1.02 mm)
Gap	Spark plug gap (8/10 kW)	0.76	mm
Gap	Spark plug gap (9 kW)	0.020	in (0.508 mm)
Gap	Spark plug gap 10kW	0.030 inch	inch
Gap	Spark plug gap 13/14/15/16/17kW	0.040 inch	inch
Gap	Spark plug gap 20kW	0.030 inch	inch
Gap	Spark plug gap 8kW	0.030 inch	inch
Gap	Écartement des électrodes des bougies d'allumage	0.508	mm (0,020 po)
Gap	Écartement des électrodes des bougies d'allumage	0.76	mm (0,030 po)
Gap	Écartement des électrodes des bougies d'allumage	1.02	mm (0,040 po)
Other	Cold Smart Start fixed temperature	20 F (-7 C)	F (C)	22-26 kW
Other	Cold Smart Start fixed temperature	50 F (10 C)	F (C)	10-20 kW
Other	Compression Ratio (1.5L)	11:1
Other	Compression Ratio (2.4L)	9.5:1
Other	Compression difference between cylinders shall not exceed	25	percent
Other	Compression difference maximum between cylinders	25 percent	percent
Other	Cylinder leak down acceptable leakage	20	percent
Other	Exercise time length (16-22 kW)	5	minutes
Other	Exercise time length (9-11 kW)	12	minutes
Other	Fusível do painel de controle	7,5	A
Other	Good starter motor maximum	62	Amps	starter performance test
Other	Ordem de partida (10 kW)	15 s de arranque, 7 s de repouso, seguidos por quatro ciclos adicionais de 7 s de arranque e 7 s de repouso		cinco ciclos de manivela

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	Capacity	Notes
Coolant	50 percent soft water and 50 percent ethylene glycol base anti-freeze	low silicate anti-freeze	2.0 U.S. gallons	Do not use chromate base rust inhibitor or high silicate anti-freeze boosters.
Coolant	50/50 ethylene glycol	Generac 50/50 ethylene glycol type coolant	9.5 liters	Use demineralized or distilled water; do not use propylene glycol. Coolant mix 40-60% volume.
Engine oil		API Service Class SJ, SL or better	1.9 Qts	Engine crankcase oil capacity including filter, approximately
Engine oil	10W-30	API Service Class SJ, SL or better		Between 40ºF and -10ºF
Engine oil	30 weight organic oil (factory fill)			Units run and tested at factory prior to shipping, no break-in required
Engine oil	5W-20	Generac proprietary 5W-20 Synthetic (after 30 hour break-in)	3.8 liters	Factory filled with 5W-20; 60 kW capacity 5.25 quarts (5 liters). Do not use special additives.
Engine oil	5W-20 (Generac proprietary)	API Service Class SJ, SL, or better	1.03 L	Oil capacity including filter. Use for continuous use after the 25 hour break-in period; specifically formulated for gaseous powered Generac generators. Do not use special additives. Change every year or 100 hours in cold weather (below 40 F) or continuous hot weather (above 85 F).
Engine oil	5W-30	Aceite orgánico 5W-30 (la unidad se entrega de fábrica llena con este aceite)		Compruebe el nivel de aceite y, de ser necesario, añada la cantidad apropiada con la viscosidad correcta. No llene en exceso. Consulte 'Recomendaciones para el aceite de motor' para tipo/viscosidad.
Engine oil	5W-30 (factory fill) / 5W-20 GEO (continuous)	Generac proprietary gaseous engine oil (GEO)		Unit comes filled with 5W-30 organic oil; after 25 hour break-in use 5W-20 GEO
Engine oil	SAE 30	API Service Class SJ, SL or better	1.5 Qts	Above 32ºF; capacity varies by engine
Engine oil	SAE 30 above 32°F; 10W-30 between 40°F and -10°F; Synthetic 5W-30 10°F and below	API Service Class SJ, SL or better; use no special additives	1.5 Qts	Oil capacity including filter
Engine oil	SAE 40 above 86 F; SAE 30 32-85 F; SAE 20W below 32 F; SAE 10W-30 all seasons	API Service SC, SD, SE or SF	3.0 U.S. quarts	Liquid-cooled 1.2 liter engine with filter change; 2.5 U.S. quarts without filter change.
Engine oil	SAE 5W-30 Synthetic	API Service Class SJ, SL or better		Do not use special additives
Engine oil	SAE 5W-30 sintético	API SJ, SL o mejor	1.03 l	9 kW; no usar aditivos especiales
Engine oil	SAE 5W-30 synthetic; SAE 30 above 60 F; SAE 10W-30 20-59 F; SAE 5W-20/5W-30 below 20 F	API Service SF, SF/CC, or SF/CD	1.5 U.S. quarts	Air-cooled V-Twin engine crankcase capacity about 1.5 U.S. quarts. Oil makeup tank capacity about 2.5 U.S. quarts on Model 9067.
Engine oil	SAE 5W-30 synthétique	API classe de service SJ, SL ou supérieure		Huile SAE 5W-30 synthétique pour toutes les plages de température. N'utilisez aucun additif spécial.
Engine oil	Synthetic 5W-30	API Service Class SJ, SL or better		10ºF and below
Engine oil	Synthetic SAE 5W-30	API Service Class SJ, SL, or better		Synthetic SAE 5W-30 for all temperature ranges. Do not use special additives. Capacities incl. filter: approx. 1.1 qt (1.03 L) 9 kW; approx. 1.7 qt (1.6 L) 11 kW; approx. 1.9 qt (1.8 L) 16/20/22 kW.
Fuel		Gas natural: contenido de BTU de por lo menos 1000 BTU/ft3 (37,26 MJ/m3). Gas LP: por lo menos 2500 BTU/ft3 (93,15 MJ/m3)	250.0 gal (946 l)	Tamaño mínimo del tanque de LP es 250 gal (946 l), salvo que los cálculos de la unidad indiquen uno mayor. Solo sistema de extracción de vapor para LP.
Fuel	Gas natural	mínimo 1000 BTU por pie cúbico (37.26 megajulios por metro cúbico)		Reducciones típicas de gas natural 10-20 % respecto a LP
Fuel	Gaz naturel		37.26 mégajoules par mètre cube (1 000 BTU par pied cube) minimum	Teneur en BTU minimale du gaz naturel.
Fuel	Gaz naturel d'au moins 37,26 mégajoules par mètre cube (1 000 BTU par pied cube)	NFPA 54
Fuel	Gaz propane liquide (gazeux)		93.15 mégajoules par mètre cube (2 500 BTU par pied cube) minimum	Capacité de réservoir de gaz propane liquide minimum recommandée de 946 litres (250 gallons).
Fuel	Gaz propane liquide d'au moins 93,15 mégajoules par mètre cube (2 500 BTU par pied cube)	NFPA 58 / ICC IFGC		Réservoir de gaz propane liquide d'une capacité minimale de 946 litres (250 gallons).
Fuel	LP (vapor)	mínimo 2500 BTU por pie cúbico (93.15 megajulios por metro cúbico)	946.0 l	Se recomienda tanque de LP de 250 gal. (946 l) de tamaño mínimo si se convierte de NG a LP
Fuel	LP Gas	at least 2,520 Btus per cubic foot		Vapor withdrawal; required pressure 10-12 inches water column
Fuel	LP Vapor	NFPA 58		Vapor withdrawal only. Recommended Btu content at least 2,520 Btus per cubic foot. Required fuel pressure 0.025 to 0.0305 kg/cm2 (10 to 12 inches water column); must never drop below 0.025 kg/cm2 (10 inches water column)
Fuel	LP gas (vapor), minimum 2,500 BTUs per ft3 (93.15 megajoules per m3)			Vapor withdrawn liquid propane.
Fuel	LP vapor	at least 2,520 BTU’s per cubic feet		Required pressure 10 inches to 12 inches water column; vapor withdrawal system only
Fuel	Liquid Propane (LP) Vapor	btu content of at least 2,500 Btus per cubic foot (93.15 megajoules per cubic meter)	250.0 gallons (946 liters) minimum LP tank size recommended	If converting from natural gas to LP

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

Fault codes

Code	Name	Meaning	Severity	Action
AUXILIARY SHUTDOWN	Auxiliary Shutdown	Unit will not start	Shutdown	Set auxiliary shutdown switch(es) to CLOSED (I); clear alarm
BATERÍA BAJA	BATERÍA BAJA	Indicador LED amarillo encendido en cualquier estado.	Warning	Borre la alarma. Navegue hasta BATTERY MENU del MAIN MENU para revisar la batería. Si indica GOOD, comuníquese con un IASD. Si indica CHECK BATTERY, reemplace la batería.
BATTERY PROBLEM	Battery Problem	Yellow LED illuminated	Warning	Contact servicing dealer
Battery Problem	Battery Fault	Battery condition poor or battery charger issue	Warning	Inspect battery condition and connections. Contact IASD if needed.
CARGADOR SIN CA	CARGADOR SIN CA	Indicador LED amarillo encendido en cualquier estado.	Warning	Comuníquese con un IASD.
CHARGER MISSING AC	Charger Missing AC	Yellow LED illuminated in any state	Warning	Contact an IASD
CHARGER WARNING	Charger Warning	Yellow LED illuminated	Warning	Contact servicing dealer
Controller Fault	Control Module Failure	Internal controller fault detected	Shutdown	Contact IASD for assistance
CONTROLLER FAULT	Controller Fault	Alarm message listed on controller menu.	Shutdown	Contact an IASD.
DESCONEXIÓN AUXILIAR	DESCONEXIÓN AUXILIAR	La unidad no arranca.	Shutdown	Coloque los interruptores de desconexión auxiliar en posición CERRADA (I).
EMERGENCY STOP	Emergency Stop	Alarm message listed on controller menu.	Shutdown	Check emergency shutdown switch and reset.
FUSE PROBLEM	Fuse Problem	Unit will not start in AUTO with utility loss	Warning	Check 7.5amp fuse, replace with ATO 7.5Amp fuse if bad
HIGH TEMPERATURE	High Temperature	Unit shuts down during operation	Shutdown	Check ventilation around generator, intake, exhaust and rear of generator
High Temperature	Overheat	Engine operating temperature too high	Shutdown	Inspect ventilation around generator, intake, exhaust, and rear. Ensure no obstructions present.
INSPECCIONE LA BATERÍA	INSPECCIONE LA BATERÍA	Indicador LED amarillo encendido en cualquier estado.	Warning	Inspeccione la batería. Presione ENTER para borrar.
INSPECT BATTERY	Inspeccionar batería	El LED amarillo se ilumina en cualquier estado	Warning	Inspeccionar la batería; pulsar ENTER para desactivar
LOW BATTERY	Low Battery	Yellow LED illuminated	Warning	Clear alarm; check battery via control panel BATTERY MENU; if GOOD contact dealer, else replace battery
Low Battery	Battery Voltage Low	Starting battery voltage below acceptable level	Warning	Inspect battery and battery cables. Charge or replace battery if necessary.
LOW OIL PRESSURE	Low Oil Pressure	Unit will not start in AUTO with utility loss	Shutdown	Check oil level / add oil per Owners Manual
Low Oil Pressure	Low Oil Level or Pressure	Insufficient oil pressure in engine	Shutdown	Check engine oil level and top up if necessary. Contact IASD if problem persists.
LOW VOLTS REMOVE LOAD	Low Volts Remove Load	Unit will not start in AUTO with utility loss	Shutdown	Clear alarm and remove household loads, put back in AUTO and restart
MISWIRE	Miswire	Unit will not start in AUTO with utility loss	Shutdown	Contact servicing dealer
NOT ACTIVATED	Not Activated	Unit will not start in AUTO with utility loss	Warning	Refer to activation section in owners manual
OVERCRANK	Overcrank	Unit will not start in AUTO with utility loss	Shutdown	Check fuel line shutoff valve ON, clear alarm, attempt manual start
Overcrank	Extended Cranking	Engine failing to start after extended crank attempts	Shutdown	Check fuel supply, spark plugs, and fuel system. Contact IASD for further diagnosis.
Overload	Overload Detected	Electrical load exceeds generator capacity	Shutdown	Remove household electrical loads from generator
OVERLOAD REMOVE LOAD	Overload Remove Load	Unit shuts down during operation	Shutdown	Clear alarm, remove household loads, put back in AUTO and restart
OVERLOAD WARNING	Aviso de sobrecarga	Aviso de sobrecarga.	Warning	Remova as cargas domésticas do gerador.
OVERSPEED	Overspeed	Unit will not start in AUTO with utility loss	Shutdown	Contact servicing dealer
Overspeed	RPM Overspeed	Engine running at excessive RPM	Shutdown	Contact IASD for assistance
OVERVOLTAGE	Overvoltage	Unit will not start in AUTO with utility loss	Shutdown	Contact servicing dealer
Overvoltage	Output Voltage High	Generator voltage exceeding nominal rating	Shutdown	Reduce electrical load and restart. Contact IASD if issue persists.
PROBLEMA DE BATERÍA	PROBLEMA DE BATERÍA	Indicador LED amarillo encendido en cualquier estado.	Warning	Comuníquese con un IASD.
RPM SENSE LOSS	RPM Sense Loss	Unit was running and shuts down, attempts to restart	Shutdown	Clear alarm, remove household loads, put back in AUTO and restart; may be fuel issue, contact servicing dealer
RPM Sensor Loss	RPM Signal Loss	RPM sensor signal not detected	Shutdown	Contact IASD for assistance
SERVICE A	Service A	Yellow LED illuminated, maintenance due	Info	Perform SERVICE A maintenance, hit ENTER to clear
SERVICE B	Service B	Yellow LED illuminated, maintenance due	Info	Perform SERVICE B maintenance, hit ENTER to clear
SHUTDOWN SWITCH	Shutdown Switch	Unit will not start. Flashing red LED.	Shutdown	Check emergency shutdown switches. Set switch(es) to CLOSED (I). Clear alarm.
STEPPER OVERCURRENT	Stepper Overcurrent	Unit will not start in AUTO with utility loss	Shutdown	Contact servicing dealer
UNDERSPEED	Underspeed	Unit will not start in AUTO with utility loss	Shutdown	Contact servicing dealer
Underspeed	Engine Speed Too Low	Engine RPM below nominal specification	Shutdown	Contact IASD for assistance
UNDERVOLTAGE	Undervoltage	Unit will not start in AUTO with utility loss	Shutdown	Contact servicing dealer
Undervoltage	Output Voltage Low	Generator voltage below nominal rating	Shutdown	Reduce electrical load and restart. Contact IASD if issue persists.
USB WARNING	Aviso de USB	Aviso relacionado ao dispositivo USB.	Warning	Tente novamente com USB de melhor qualidade. Os nomes dos ficheiros no USB não podem ter mais de 8 caracteres.
Wiring Error	Electrical Wiring Fault	Wiring configuration error detected	Shutdown	Contact IASD for assistance
WIRING ERROR	Wiring Error	Unit will not start in AUTO with utility loss	Shutdown	Contact an IASD

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

Procedures

Adjust Valve Clearance adjustment

⚠ Allow engine to cool before adjusting valve clearance.

Tools: feeler gauge, 10 mm wrench, 13 mm wrench, 14 mm wrench, 8 mm wrench, 10 mm Allen wrench, torque wrench

Make sure piston is at TDC of compression stroke (both valves closed).
Remove spark plug wire(s) and position away from plugs.
Remove spark plug(s).
Remove the four screws attaching valve cover; remove and discard gasket.
Loosen rocker jam nut (10 mm wrench 9-11 kW; 13 mm wrench 16-22 kW).
Turn pivot ball stud (14 mm wrench 9 kW; 8 mm wrench 11 kW; 10 mm Allen 16-22 kW) while checking clearance with feeler gauge.
Hold rocker arm jam nut in place as pivot ball stud is turned.
When clearance correct, hold pivot ball stud and tighten rocker arm jam nut to torque spec.
Recheck valve clearance after tightening jam nut.
Install new valve cover gasket.
Install valve cover; tighten fasteners in cross pattern to torque spec.
Install spark plugs and torque to 18 ft-lbs (25 Nm).
Reattach spark plug wire to spark plug.
Repeat process for other cylinder if necessary.

Adjust ignition magneto air gap — V-twin adjustment

Tools: 0.008-0.012 inch thickness gauge

Rotate flywheel until magnet is under module laminations.
Place 0.008-0.012 inch (0.20-0.30mm) thickness gauge between magnet and laminations.
Loosen mounting screws and let magnet pull magneto against gauge.
Tighten both mounting screws.
Rotate flywheel to remove thickness gauge.
Repeat for second magneto.

Adjusting Magneto Flywheel Gap adjustment

⚠ Air gap between ignition magneto and flywheel on single cylinder engines is not adjustable.

Tools: 0.008-0.012 inch thickness gauge

Rotate the flywheel until the magnet is under the module (armature) laminations.
Place a 0.008-0.012 inch (0.20-0.30mm) thickness gauge between flywheel magnet and module laminations.
Loosen the mounting screws and let the magnet pull the magneto down against the thickness gauge.
Tighten both mounting screws.
To remove the thickness gauge, rotate the flywheel.
Repeat the above procedure for the second magneto.

Adjusting Valve Clearance adjustment

⚠ Risk of Burn. Allow the engine to cool before performing the following procedure.

Tools: Feeler gauge, 10 mm wrench, 13 mm wrench, 14 mm wrench, 10 mm hex key

Allow engine to cool before adjusting valve clearance.
Remove spark plug wire(s) away from plugs and remove spark plug(s).
Remove the four screws attaching the valve cover; remove and discard gasket.
Verify piston is at TDC of its compression stroke (both valves closed).
Loosen rocker jam nut using a 10 mm wrench (10 kW) or 13 mm wrench (20–22 kW).
Turn pivot ball stud with a 14 mm wrench (10 kW) or 10 mm hex key (20–22 kW) while checking clearance with a feeler gauge.
Hold pivot ball stud and tighten rocker arm jam nut to specification.
After tightening jam nut, verify valve clearance did not change.
Install new valve cover gasket and valve cover; tighten fasteners in a cross pattern.
Install spark plugs and tighten to 18 ft-lbs (25 Nm).
Attach spark plug wire to spark plug.
Repeat process for other cylinder if equipped.

Ajustar a folga das válvulas adjustment

⚠ Risco de queimaduras. Deixe o motor esfriar antes de executar o procedimento.

Tools: Chave de 10 mm, Chave de 13 mm, Chave de 14 mm, Chave sextavada de 10 mm, Calibrador

Remova os fios das velas de ignição e remova as velas de ignição.
Remova os quatro parafusos que prendem a tampa da válvula; descarte a junta.
Verifique se o pistão está no TDC do seu curso de compressão.
Solte a contraporca do balanceiro (C) com chave de 10 mm ou 13 mm.
Gire o pino de esfera articulada (D) com chave de 14 mm ou sextavada de 10 mm e ajuste a folga.
Aperte a contraporca do braço oscilante e inspecione a folga novamente.
Instale a nova junta e as tampas das válvulas; aperte em padrão transversal.
Instale as velas e aperte a 25 Nm; conecte os fios das velas.

Ajuste de la luz de válvulas adjustment

⚠ Dejar enfriar el motor antes de ajustar.

⚠ Iniciar los cuatro tornillos antes de apretar.

Tools: Calibre de espesores, Llaves de 8/10/13/14 mm, Llave de casquillo, Casquillo grande

Cerrar la válvula de combustible y desconectar la batería.
Retirar cable(s) de bujía y alejarlos.
Retirar la(s) bujía(s).
Llevar el pistón al PMS de la carrera de compresión.
Retirar los cuatro tornillos de la cubierta de válvulas y desechar la junta.
Aflojar la contratuerca del balancín.
Girar el prisionero de bola pivote para ajustar la luz con calibre.
Sostener el prisionero y apretar la contratuerca; verificar y reinstalar con junta nueva.

Ajuste de la separación de la válvula adjustment

⚠ Deje que el motor se enfríe antes del procedimiento.

⚠ Desconecte el cable negativo y luego el positivo de la batería.

⚠ No necesario en unidades 14 o 18 kW con motor de 816 cc.

Tools: Llave de 10 mm, Llave de 13 mm, Llave de 14 mm, Llave hexagonal de 10 mm, Galga de espesores

Retire los hilos de las bujías y las bujías.
Retire los cuatro tornillos de la cubierta de la válvula y deseche la junta.
Verifique que el pistón esté en el PMS de su carrera de compresión.
Suelte la contratuerca del balancín (llave 10 mm en 10 kW, 13 mm en 20 a 24 kW).
Gire el espárrago del pivote (llave 14 mm en 10 kW, hexagonal 10 mm en 20 a 24 kW) ajustando la separación.
Sostenga el espárrago y apriete la contratuerca del balancín.
Inspeccione la separación para verificar que no cambió.
Instale una junta nueva y la cubierta de la válvula; apriete en patrón cruzado.
Instale las bujías y apriete a 25 Nm (18 lb-pie).
Conecte los hilos de las bujías.

Check and Adjust Accessory / Drive Belt adjustment

Tools: Belt deflection gauge

Inspect belt for cracks, fraying, excessive wear or other damage.
Verify belt is free of grease and oil; replace if contaminated.
Using a suitable gauge, apply 22 Ibs (10 kgf) force midway between water pump and alternator pulleys.
Loosen DC alternator tension bracket screw.
Rotate alternator outward to reduce belt deflection.
Rotate inward to increase belt deflection.
Tighten DC alternator tension bracket screw to 17-22 ft-lbs (23-30 Nm).
Recheck belt deflection and repeat steps as necessary.

Check and Adjust Engine Governor (Single Cylinder Units) adjustment

Tools: Frequency meter, torque wrench

Loosen the governor clamp bolt.
Hold the governor lever at wide open throttle position.
Rotate the governor shaft clockwise as far as it will go.
Tighten the governor lever clamp bolt to 70 inch-pounds (8 N-m).
Start the generator; let it stabilize and warm up at no-load.
Connect a frequency meter across the generator AC output leads.
Turn the primary adjust screw to obtain a frequency of 61.5 Hz.
Turn the secondary adjust screw to obtain a frequency of 62.5 Hz.

Check and Adjust Ignition Magnetos adjustment

Tools: 0.008-0.012 inch thickness gauge

Rotate flywheel until magnet is under module laminations.
Place 0.008-0.012 inch thickness gauge between magnet and laminations.
Loosen mounting screws and let magnet pull magneto down.
Tighten both mounting screws.
Rotate flywheel to remove gauge.
Repeat for second magneto.

Check and Adjust Ignition Magnetos (Adjusting Magneto Flywheel Gap) adjustment

Tools: 0.008-0.012 inch thickness gauge

Rotate the flywheel until the magnet is under the module (armature) laminations.
Place a 0.008-0.012 inch (0.20-0.30 mm) thickness gauge between the flywheel magnet and the module laminations.
Loosen the mounting screws and let the magnet pull the magneto down against the thickness gauge.
Tighten both mounting screws.
To remove the thickness gauge, rotate the flywheel.
Repeat the above procedure for the second magneto.

Check and Adjust Valves adjustment

Tools: 10mm allen wrench, flat feeler gauge, torque wrench

Remove the four (4) screws from the rocker cover.
Remove the rocker cover and rocker cover gasket.
Loosen the rocker arm jam nut.
Use a 10mm allen wrench to turn the pivot ball stud.
Check clearance between rocker arm and valve stem with a flat feeler gauge.
Set valve clearance to 0.05-0.1mm (0.002-0.004 in.) cold.
Hold pivot ball stud with allen wrench and tighten rocker arm jam nut to 174 inch pounds.
Recheck valve clearance to make sure it did not change.
Re-install rocker cover gasket, rocker cover and the four screws.

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
		0 – c.c. (-)	NOIR no 3	Fil de mise à la terre normal; obligatoire si jumelé à un commutateur de transfert de gestion intelligente de l'alimentation de Generac.
		23	BLANCO Núm. 5	Cable de señal lógica del control de transferencia
		23 (White #5)	E	Transfer Control Signal Wire
		Generator control wiring - 1-115 ft (1-35 m)	N1, N2, T1, 23, 194	No. 18 AWG
		Generator control wiring - 116-185 ft (36-56 m)	N1, N2, T1, 23, 194	No. 16 AWG
		Generator control wiring - 186-295 ft (57-89 m)	N1, N2, T1, 23, 194	No. 14 AWG
		Generator control wiring - 296-460 ft (90-140 m)	N1, N2, T1, 23, 194	No. 12 AWG
		Longueur de fil 1 à 35 m (1 à 115 pi)	Calibre 18 AWG	Conducteurs en cuivre seulement.
		Longueur de fil 35 à 56 m (115 à 185 pi)	Calibre 16 AWG	Conducteurs en cuivre seulement.
		Longueur de fil 56 à 89 m (185 à 295 pi)	Calibre 14 AWG	Conducteurs en cuivre seulement.
		Longueur de fil 89 à 140 m (295 à 460 pi)	Calibre 12 AWG	Conducteurs en cuivre seulement.
		Neutral for battery charger	WHITE NEU/00	Must be connected to keep battery charged whether unit is running or not
	1	Connect a 2008 and later load center switch to a pre-2008 air-cooled generator: Wire 0 will not be utilized. Remove battery charger from the transfer switch. Connect N1 (BLU) to N1 (YEL), N2 (YEL) to N2 (YEL), 23 (BRN) to 23 (WHT), 194 (ORG) to 15B (RED) using UL approved wire nuts.	N1, N2, 23, 194, 15B, 0	Battery charger in transfer switch will not be utilized in operation of the generator.
	1	Connect a pre-2008 load center switch to a current or future air-cooled generator: Wire 0 will not be utilized. Connect N1 (BLU) to N1 (YEL), N2 (YEL) to N2 (YEL), 23 (BRN) to 23 (WHT), 194 (ORG) to 15B (RED) using UL approved wire nuts.	N1, N2, 23, 194, 15B, 0	Wire 194 changed to 15B on current model air-cooled generators.
0 VCC		0	NEGRO Núm. 3	CC (-) Cable común de conexión a tierra. Requerido si el generador está apareado con un interruptor de transferencia de gestión de alimentación inteligente Generac.
12 V c.c.		194 – c.c. (+)	ROUGE no 4	Pour les commandes de transfert.
12 VCC		194	ROJO núm. 4	CC (+) para los controles de transferencia
12 VDC		194 (Red #4)	D	DC (+) 12 VDC for Transfer Controls
12 VDC		DC (+) 12 VDC for transfer controls	RED 194
12 VDC		DC (-) common ground wire	BLACK 0
12 VDC		Transfer control signal wire	WHITE 23	Required if generator is paired with optional Digital Power Management (DPM) smart technology
120 V c.a.		T1	BLEU no 3	Avec fusible 120 V c.a. pour le chargeur de la batterie; doit être branché pour que la batterie demeure chargée.
120 VAC		Fused 120 VAC for battery charger	BLUE T1	Must be connected to keep battery charged whether unit is running or not
120 VAC		T1 (White #3)	B	Fused 120VAC for Battery Charger
120 VCA		T1	AZUL Núm. 3	Con fusible para el cargador de baterías (debe estar conectado para mantener la batería cargada, esté o no funcionando la unidad)
120/208	3	parallel wye	S1 through S12; bolted junctions: 4,5,6,10,11,12 to Neutral (00); S1 and S7 to Line E1; S2 and S8 to Line E2; S3 and S9 to Line E3	Voltage Code B. Six coils, twelve leads brought out to AC connection panel.
120/240	1	3-wire	Leads 11 and 44 are hot; junction of Leads 22 and 33 is neutral	Voltage Code A. Stator AC power windings each supply 120 volts AC; in series they supply 240 volts AC.
120/240	1 or 3	delta	Two of six stator coils are double-wound. For 1-phase: connect 240 V loads across Lines E1 and E2; connect 120 V loads across Lines E1 to 00 or E3 to 00.	Voltage Code D.
120/240	Single	L14-30 (models 6852-6854)		30 Amp inlet for 6852-6854; CS6377 inlet for 9854-9855 (50 Amp)
240	1	Transfer switch terminal lugs: connect utility source hot lines to N1 and N2; connect standby source hot lines (E1, E2) to E1 and E2; connect load lines from T1 and T2 to electrical load circuit; connect UTILITY, STANDBY and LOAD neutral lines to neutral block.	N1, N2, E1, E2, T1, T2	In 1-phase systems with a 2-pole transfer switch.

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 displacement of the Generac GForce?

The Generac GForce has a displacement of 0.999 liters.

Which generators use the Generac GForce engine?

The Generac GForce powers 14 generator set(s), including Generac 7029, Generac 7031, Generac 7035, Generac 7171, Generac 7179.

How often should you change the oil in the Generac GForce?

The Generac GForce oil change interval is every 25 hours.

What is a common problem with the Generac GForce engine?

A commonly reported issue on generators using the Generac GForce is: Unit will not start in AUTO with utility loss. Cause: Start delay countdown. Fix: If the start up delay is greater than expected, contact servicing dealer to adjust from 2 to 1500 seconds..