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Generac G-Force 800 Series Engine

The Generac G-Force 800 Series is a 0.82 L 2-cylinder air-cooled engine rated at 3600 rpm. It powers generator sets from Generac, including the G007173-0, G007174-0, G007175-0 and G007176-0. It holds 2.1 L (0.6 gal) of oil.

Also known as: Generac G-Force 800 Series

Part of the Generac G-Force 800 engine family — 3 variants share parts & fitment.

0.816 L

Displacement

Cylinders

3600 rpm

Rated speed

2.1 L

Oil capacity

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

Engine specifications

Oil capacity	2.1 L
Displacement	0.816 L
Cylinders	2
Aspiration	Air-cooled
Rated speed	3600 rpm

Generator sets powered by this engine

Generac G007173-0 Generac G007174-0 Generac G007175-0 Generac G007176-0 Generac G007177-0 Generac G007178-0 Generac G0072100 Generac G007223-0 Generac G007224-0 Generac G007225-0 Generac G007226-0 Generac G007228-0 Generac G007258-0 Generac G007259-0 Generac G007323-0 Generac G007324-0

How to read your Generac engine serial & model number →

Common problems

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.
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
Engine cranks but will not start
Cause: No fuel
Fix: Replenish fuel / turn on fuel valve.
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).
Unit consumes large amounts of oil
Cause: Excessive engine oil
Fix: Adjust oil to correct level. See Checking Engine Oil Level.
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 — LED: YELLOW LOW BATTERY
Fix: Clear alarm. Using control panel, check battery by navigating to BATTERY MENU option from MAIN MENU. If battery condition displays GOOD, contact an IASD. If control panel displays CHECK BATTERY, replace battery
Yellow LED illuminated in any state LOW BATTERY
Fix: Clear alarm. Using control panel, check battery by navigating to BATTERY MENU option from MAIN MENU. If battery condition displays GOOD, contact an IASD. If control panel displays CHECK BATTERY, replace battery
No AC output from generator
Cause: Generator MLCB (generator disconnect) is OFF (OPEN)
Fix: Set generator MLCB (generator disconnect) to ON (CLOSED).
Yellow LED illuminated in any state — LED YELLOW LOW BATTERY
Cause: Check screen for additional information.
Fix: Clear alarm. Using control panel, check battery by navigating to BATTERY MENU option from MAIN MENU. If battery condition displays GOOD, contact an IASD. If control panel displays CHECK BATTERY, replace battery.
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
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.
Unit shuts down during operation — LED RED HIGH TEMPERATURE
Cause: Check LEDs / screen for alarms.
Fix: Inspect ventilation around generator, intake, exhaust, and rear of generator. If no obstructions are present, contact an IASD.
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

Compiled from service & troubleshooting documentation across every generator set that uses the Generac G-Force 800 Series.

Maintenance schedule

Item	Spec	Capacity	Part #	Interval
Oil		2.4 L	—	200 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.
Huile moteur et filtre à huile	Change	25 hr		First service — Après les premières 25 heures de marche
Jeu des soupapes	Adjust	25 hr		First service — Après les premières 25 heures de marche; puis toutes les 400 heures
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
Air cleaner	Inspect	200 hr		2 years or 200 hours; replace as necessary
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		2 years or 200 hours; to be completed by a dealer
Engine oil	Change	200 hr	24 mo	First service — Up to 2 year/200 hour oil change interval
Inspect Air Filter	Inspect	200 hr		200 hours or 2 years
Inspect Spark Plugs	Inspect	200 hr		200 hours or 2 years
Oil	Change	200 hr		2 years or 200 hours; first change after first 8 hours; 20kW: 100 hours or 2 years
Oil filter	Change	200 hr		2 years or 200 hours; first change after first 8 hours; 20kW: 100 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 filter	Replace	400 hr	48 mo	Schedule B maintenance
Battery condition, electrolyte level, and state of charge	Inspect	400 hr	48 mo	Schedule B
Bujía(s)	Replace	400 hr	48 mo	Programa B: cada cuatro años o 400 horas.
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	Schedule B
Filtro de aire del motor	Replace	400 hr	48 mo	Programa B: cada cuatro años o 400 horas.
Filtro de ar do motor	Replace	400 hr	48 mo	Programação B (4 anos ou 400 h)
Folga da válvula	Adjust	400 hr	48 mo	First service — Inspecionar/ajustar após as primeiras 25 h e depois a cada 400 h; Programação B; exclui 14/18 kW com motor 816 cc
Sediment trap	Clean	400 hr	48 mo	Schedule B maintenance
Separación de la válvula	Adjust	400 hr	48 mo	First service — Programa B. Inspeccione y ajuste después de las primeras 25 horas y luego cada 400 horas. No necesario en unidades 14/18 kW con motor 816 cc.
Spark plug gap / spark plug	Clean	400 hr	48 mo	Schedule B; inspect gap and replace if necessary; emissions-critical maintenance
Spark plug(s)	Clean	400 hr	48 mo	Schedule B; inspect gap and replace if necessary
Spark plug(s)	Inspect	400 hr	48 mo	Schedule B maintenance; clean, inspect gap, replace if necessary
Spark plug(s)	Replace	400 hr	48 mo	Schedule B. Emissions-critical.
Valve clearance	Adjust	400 hr	48 mo	First service — Schedule B; inspect/adjust valve clearance after first 25 hours of operation, then at 400 hour intervals. Where applicable; excludes units with hydraulic lifters (14 or 18 kW with 816cc engine).
Valve clearance	Inspect	400 hr	48 mo	First service — Where applicable; excludes units with hydraulic lifters (14 kW and 18 kW with 816cc engine).
Vela(s) de ignição	Replace	400 hr	48 mo	Programação B (4 anos ou 400 h)
Bateria	Check		12 mo	Estado da bateria; todos os anos
Battery	Inspect		1 mo	Monthly; remove corrosion, ensure dryness
Battery charge state	Check		6 mo	Every 6 months

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

Service specifications

Type	Item	Value	Unit	Condition
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 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 (0.20-0.30mm)	inch
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 (during replacement)	0.010	inch
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	0.020	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 inch)	gap	410 cc and 530 cc engines
Gap	Spark plug gap	1.02	mm
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 (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 (410cc 6/7 kW)	0.030	inch
Gap	Spark plug gap (530cc 9/10 kW)	0.030	inch
Gap	Spark plug gap (8/10 kW)	0.76	mm
Gap	Spark plug gap (990cc 13/16/18 kW)	0.040	inch
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 de bougie	0,508	mm (0,020 po)
Gap	Écartement de bougie	1,02	mm (0,040 po)
Other	Battery charge output	0.050 to 2.5	amps
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 difference maximum between cylinders	25 percent	percent
Other	Compression ratio	9.5:1
Other	Fusível do painel de controle	7,5	A
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
Other	Ordem de partida (14 a 24 kW)	16 s de arranque, 7 s de repouso, 16 s de arranque, 7 s de repouso, seguidos por três ciclos adicionais de 7 s de arranque e 7 s de repouso		cinco ciclos de manivela
Other	Perda de potência do motor por altitude	3,5	% a cada 304,8 m (1.000 pés) acima do nível do mar
Other	Perda de potência do motor por temperatura	1	% a cada 6 °C (10 °F) acima de 15 °C (60 °F)
Other	Redução de classificação GN vs PL	10 a 20	%
Other	Starter motor maximum amps V-twin	62	amps
Other	Starter motor maximum amps single cylinder	9	amps
Other	Starter motor performance, V-twin	Minimum rpm 3250; Maximum Amps 62
Other	Starter motor performance, single cylinder	Minimum rpm 4500; Maximum Amps 9
Other	Tamanho mínimo de tanque de PL ao converter de GN	946	L (250 gal)
Other	Under-frequency shutdown 60 Hz with 0H6680A Controller	50 Hz	Hz
Other	Under-frequency shutdown 60 Hz with 0H6680B Controller	55 Hz	Hz
Pressure	Compression difference between cylinders maximum	25	percent
Pressure	Compression minimum (single cylinder)	60	psi	cold
Pressure	Compression minimum single cylinder cold	60 PSI	PSI	cold
Pressure	Cylinder leak down acceptable leakage	20	percent
Pressure	Cylinder leak down regulated pressure	80	psi
Pressure	Cylinder leak down tester regulated pressure	80	psi	air source at least 90 psi
Pressure	Fuel pressure (Liquid Propane)	10-12	in water column (2.49-2.99 kPa)	at generator fuel inlet
Pressure	Fuel pressure (Natural Gas)	3.5-7.0	in water column (0.87-1.74 kPa)	at generator fuel inlet

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

Recommended fluids

Fluid	Grade	Standard	Ambient	Capacity	Notes
Engine oil		API SJ, SL ou mieux			Changer l'huile chaque année ou toutes les 100 heures par temps froid (< 4,4 °C) ou exploitation continue par temps chaud (> 29,4 °C)
Engine oil	10W-30	API Service Class SJ, SL or better			Between 40ºF and -10ºF
Engine oil	5W-20				Aceite 5W-20 propiedad de Generac para uso continuo, después del período de asentamiento de 25 horas.
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 prellenado de fábrica.
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	Generac 5W-20 exclusive	API SJ, SL ou mieux			Après la période de rodage de 25 heures et à chaque intervalle; spécialement formulée pour les génératrices Generac alimentées au gaz
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 5W-20/5W-30	API Service class SG, SH, or SJ	below -7°C		Below 20° F (-7° C)
Engine oil	SAE 5W-30 Synthetic	API Service class SG, SH, or SJ			For all seasons
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			For all temperature ranges; do not use special additives. Oil capacity including filter: approx. 1.1 qt (1.03 L) 10 kW; approx. 2.2 qt (2.1 L) 13/16 kW; approx. 1.9 qt (1.8 L) 20/22 kW
Engine oil	SAE 10W-30	API Service class SG, SH, or SJ	-7°C to 15°C		20° to 59° F (-7° to 15° C)
Engine oil	SAE 30	API Service class SG, SH, or SJ	above 16°C		Above 60° F (16° C)
Fuel		Gás natural: mínimo 37,26 MJ/m³ (1.000 BTU/pé³); PL: mínimo 93,15 MJ/m³ (2.500 BTU/pé³)			Sistema de combustível de dupla carburação; configurado de fábrica para GN
Fuel	Gas natural	Contenido de BTU de al menos 37.26 MJ/m3 (1,000 BTU/pie3); presión de suministro 0.87 a 1.74 kPa (3.5 a 7.0 pulg. de columna de agua) en la entrada de combustible			Tamaño mínimo de tanque/medidor debe cubrir el generador a carga completa más todas las cargas de los artefactos.
Fuel	LP Gas	at least 2,520 Btus per cubic foot			Vapor withdrawal; required pressure 10-12 inches water column
Fuel	LP gas	At least 2,520 Btus per cubic foot
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 (vapor)			2500.0 BTU/ft3 (93.15 MJ/m3) minimum	Vapor withdrawn; minimum tank size 250 gal (946 L) when converting from NG
Fuel	Liquid propane (LP) vapor	BTU content at least 2,500 BTUs per ft3 (93.15 megajoules per m3)			If converting to LP gas from NG, a minimum LP tank size of 250 gal (946 L) is recommended.
Fuel	Natural Gas	at least 1,000 Btus per cubic foot			Required pressure 5-7 inches water column
Fuel	Natural gas	At least 1,000 Btus per cubic foot
Fuel	Natural gas (NG)	BTU content at least 1,000 BTUs per ft3 (37.26 megajoules per m3)			Unit factory-configured to run on NG.
Fuel	Natural gas (NG) or liquid propane (LP) vapor	Minimum 1,000 BTUs per ft3 (37.26 MJ per m3) for NG; minimum 2,500 BTUs per ft3 (93.15 MJ per m3) for LP			Dual fuel carburetion; factory configured for NG. If converting to LP, minimum LP tank size of 250 gal (946 L) recommended
Fuel	Natural gas (vapor) or liquid propane vapor	NG at least 1,000 BTU/ft3 (37.26 MJ/m3); LP at least 2,500 BTU/ft3 (93.15 MJ/m3)			Factory configured for NG; minimum 250 gal (946 L) LP tank recommended if converting to LP
Fuel	Natural gas or LP gas				Required fuel pressure to generator fuel inlet: 3.5–7.0 in water column for NG; 10–12 in water column for LP
Fuel	Natural gas or LP gas (vapor withdrawal only for LP)	Natural gas Btu content at least 1,000 Btus per cubic foot; LP gas at least 2,520 Btus per cubic foot			Required fuel pressure: NG 5 to 7 inches water column; LP 10 to 12 inches water column. NFPA 54 for natural gas, NFPA 58 for liquid propane.
Fuel	Natural gas, minimum 1,000 BTUs per ft3 (37.26 megajoules per m3)				Dual fuel carburetion; factory-configured for NG. Minimum LP tank size 250 gal (946 L) if converting 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 Fault	Battery condition poor or battery charger issue	Warning	Inspect battery condition and connections. Contact IASD if needed.
BATTERY PROBLEM	Battery Problem	Yellow LED illuminated in any state	Warning	Contact an IASD
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 in any state	Warning	Contact an IASD
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	Alarm message listed on controller menu.	Shutdown	Check 7.5A controller fuse and replace if blown.
High Temperature	Overheat	Engine operating temperature too high	Shutdown	Inspect ventilation around generator, intake, exhaust, and rear. Ensure no obstructions present.
HIGH TEMPERATURE	High Temperature Alarm	Unit shuts down during operation	Shutdown	Check LED's / Screen for alarms. Inspect ventilation around generator intake, exhaust, and rear. If no obstructions present, contact IASD.
INSPECCIONE LA BATERÍA	INSPECCIONE LA BATERÍA	Indicador LED amarillo encendido en cualquier estado.	Warning	Inspeccione la batería. Presione ENTER para borrar.
INSPECT BATTERY	Inspecionar a bateria	LED amarelo aceso em qualquer estado.	Info	Inspecione a bateria. Pressione ENTER para apagar.
Low Battery	Battery Voltage Low	Starting battery voltage below acceptable level	Warning	Inspect battery and battery cables. Charge or replace battery if necessary.
LOW BATTERY	Low Battery Alarm	Yellow LED illuminated in any state	Warning	Clear alarm and check battery status. If battery displays GOOD, contact IASD. If displays CHECK BATTERY, replace battery.
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 OIL PRESSURE	Low Oil Pressure Alarm	Unit will not start in AUTO with utility loss	Shutdown	Check oil level and add oil as needed. If oil level is correct, contact IASD.
LOW VOLTS REMOVE LOAD	Low Voltage Alarm	Unit will not start in AUTO with utility loss	Warning	Clear alarm and remove household loads. Put into AUTO and restart.
NOT ACTIVATED	Unit Not Activated	Unit will not start in AUTO with utility loss. No LED.	Info	See Activation section in installation manual.
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.
OVERCRANK	Overcrank Alarm	Unit will not start in AUTO with utility loss	Shutdown	Verify fuel line shutoff valve is ON. Clear alarm. Start unit in MANUAL. If it does not start or starts rough, contact IASD.
Overload	Overload Detected	Electrical load exceeds generator capacity	Shutdown	Remove household electrical loads from generator
OVERLOAD REMOVE LOAD	Overload Alarm	Unit shuts down during operation	Shutdown	Check LED's / Screen for alarms. Clear alarm and 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	RPM Overspeed	Engine running at excessive RPM	Shutdown	Contact IASD for assistance
OVERSPEED	Overspeed	Unit will not start in AUTO with utility loss	Shutdown	Contact an IASD
Overvoltage	Output Voltage High	Generator voltage exceeding nominal rating	Shutdown	Reduce electrical load and restart. Contact IASD if issue persists.
OVERVOLTAGE	Overvoltage	Unit will not start in AUTO with utility loss	Shutdown	Contact an IASD
PROBLEMA DE BATERÍA	PROBLEMA DE BATERÍA	Indicador LED amarillo encendido en cualquier estado.	Warning	Comuníquese con un IASD.
RPM SENSE LOSS	RPM Sense Loss Alarm	Unit was running and shuts down, attempts to restart	Shutdown	Clear alarm and remove household loads. Put back in AUTO and restart. If generator does not start, contact IASD.
RPM Sensor Loss	RPM Signal Loss	RPM sensor signal not detected	Shutdown	Contact IASD for assistance
SERVICE A	Service A Maintenance Alert	Yellow LED illuminated - maintenance due	Info	Perform SERVICE A maintenance. Press ENTER to clear.
SERVICE B	Service B Maintenance Alert	Yellow LED illuminated - maintenance due	Info	Perform SERVICE B maintenance. Press 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 an IASD
Underspeed	Engine Speed Too Low	Engine RPM below nominal specification	Shutdown	Contact IASD for assistance
UNDERSPEED	Underspeed	Unit will not start in AUTO with utility loss	Shutdown	Contact an IASD
Undervoltage	Output Voltage Low	Generator voltage below nominal rating	Shutdown	Reduce electrical load and restart. Contact IASD if issue persists.
UNDERVOLTAGE	Undervoltage	Unit will not start in AUTO with utility loss	Shutdown	Contact an IASD
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 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 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.

Ajuster le jeu des soupapes adjustment

⚠ Risque de brûlure : laisser le moteur refroidir avant d’exécuter la procédure.

⚠ Réglage non requis sur les modèles de 14 ou 18 kW à moteur de 816 cc.

Tools: Clé de 10 mm ou 13 mm, Clé de 14 mm ou clé hexagonale de 10 mm, Jauge d’épaisseur

Laisser le moteur refroidir.
Débrancher les câbles de bougie et les placer à l’écart.
Retirer les bougies.
Retirer les quatre vis du cache-culbuteurs et mettre le joint au rebut.
S’assurer que le piston est au point mort haut (PMH) de sa course de compression.
Desserrer le contre-écrou de culbuteur.
Faire tourner le goujon pivot tout en contrôlant le jeu avec une jauge d’épaisseur.
Ajuster le jeu conformément à la section Moteur.
Tenir le goujon pivot et serrer le contre-écrou au couple spécifié.
Poser un joint de cache-culbuteurs neuf et remonter le cache-culbuteurs.
Mettre les bougies en place au couple de 25 Nm (18 pi-lb).

Check and Adjust Engine Governor (Single Cylinder Units) adjustment

Tools: frequency meter

Loosen governor clamp bolt.
Hold governor lever at wide open throttle; rotate governor shaft clockwise fully; tighten clamp bolt to 70 inch-pounds.
Start generator and let stabilize at no-load.
Connect frequency meter across AC output leads.
Turn primary adjust screw to obtain 61.5 Hz.
Turn secondary adjust screw to obtain 62.5 Hz.
Check AC voltage; adjust voltage regulator if needed.

Check and Adjust Ignition Magnetos adjustment

⚠ Magneto air gap on single cylinder engines is non-adjustable.

Tools: VOM, thickness gauge 0.008-0.012 inch

Disconnect Wire 18 from terminal by oil cooler.
Disconnect spark plug wires from spark plugs.
Measure primary winding resistance: approximately 300K ±10K ohms.
Measure secondary winding resistance: approximately 14K ±3K ohms.
Check diode isolation between magnetos; INFINITY should be measured.
For V-twin, rotate flywheel until magnet is under laminations.
Place 0.008-0.012 inch thickness gauge between magnet and laminations.
Loosen mounting screws and let magnet pull magneto down against gauge.
Tighten both mounting screws.
Remove gauge by rotating flywheel.
Repeat for second magneto.
Retest for spark.

Check and Adjust Valves adjustment

⚠ Make sure piston is at TDC of compression stroke with both valves closed.

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

Remove four screws from rocker cover.
Remove rocker cover and gasket.
Loosen rocker arm jam nut.
Use 10mm allen wrench to turn pivot ball stud; check clearance with flat feeler gauge.
When correct, hold stud and tighten jam nut to 174 inch pounds.
Recheck valve clearance.
Re-install gasket, cover, and four screws.

Check and adjust valve clearance adjustment

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

Ensure piston is at Top Dead Center of compression stroke.
Remove four rocker cover screws, rocker cover, and gasket.
Loosen rocker arm jam nut.
Use 10mm Allen wrench to turn pivot ball stud; check clearance with flat feeler gauge.
Hold pivot ball stud and tighten jam nut to 174 inch pounds.
Recheck clearance and reinstall gasket, cover, and screws.

Checking Valve Clearance adjustment

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

⚠ Accidental start-up. Disconnect spark plug wires when working on unit.

Tools: Feeler gauge, Large socket and socket wrench

Close fuel valve and disconnect battery to avoid accidental startup.
Remove spark plug wire(s) and position away from plug(s).
Remove spark plug(s).
Remove the four screws attaching the valve cover; remove and discard gasket.
Verify piston is at top dead center (TDC) of its compression stroke (both valves closed).
Inspect valve clearance between each rocker arm and valve stem with a feeler gauge.
Install replacement valve cover gasket(s).
Install valve cover(s); tighten fasteners in a cross pattern.

Conversión de combustible (GN a PL) adjustment

⚠ La perilla del selector de combustible debe ajustarse al combustible correcto para que el generador funcione correctamente.

Ubique la perilla de conversión de combustible naranja (bajo el mezclador en 10 kW; sobre el mezclador en 14 a 24 kW).
Gire la perilla de conversión hacia la flecha del tipo de combustible marcado hasta que se detenga.
La perilla gira 180° y se desliza hacia dentro del mezclador al convertir a propano líquido.
Ingrese la selección de combustible (PL/GN) en el controlador mediante el Asistente de instalación o el menú EDITAR.

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
		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
		N1, N2, T1, Leads 23 and 194	All conductors rated for minimum 300V	Class 1 remote control/signaling circuits. Install per NEC Article 300 and recognized wiring methods. Sense wires through wire tie C1 to sense wire terminal block B. Control wires through wire tie C2 to control wire terminal block A.
		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.
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 VAC		Fused 120 VAC for battery charger	BLUE T1	Must be connected to keep battery charged whether unit is running or not
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.
240 VAC		Utility dropout and pickup sensing	YELLOW N1 & N2
240 VAC	1	Customer load to T1 and T2 terminals	T1, T2	Load leads are pre-wired at the factory
240 VAC	1	Generator (standby) source to E1 and E2 terminals	E1, E2
240 VAC	1	Utility (normal) source to N1 and N2 terminals	N1, N2	Single-phase neutral connected to neutral lug, not switched

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 G-Force 800 family

Part #	Description	Category
0C8127	Recommended Air Filter	Air filter
0J8478	Air Filter	Air filter
0J8478S	Air filter	Air filter
A0006487350	AGM Group BTX20L Battery	Battery
G005819-0	26R Wet Cell Battery	Battery
JN-255000A-J	Fuel filter	Fuel filter
10000014927	Joint de cache-culbuteurs	Gasket
070185B	OIL FILTER	Oil filter
070185E	Oil Filter	Oil filter
070185ES	Filtre à huile recommandé	Oil filter
0D7178T	Control panel fuse	Service part / kit
0F6148DSRV	Battery Warming Blanket	Service part / kit
0H3421S	26R Exide battery	Service part / kit
0K8184	1 in ball valve	Service part / kit
0K8754	3/4 in ball valve	Service part / kit
0L2844	1-1/4 in ball valve	Service part / kit
0L2845	1-1/2 in ball valve	Service part / kit
G005621-0	Auxiliary Transfer Switch Contact Kit	Service part / kit
G007000-1	Generac Load Manager (50 amp)	Service part / kit
G007006-1	Generac Load Manager (100 amp)	Service part / kit
G007009-0	LTE LP Tank Fuel Level Monitor	Service part / kit
G007102-1	Oil Heater	Service part / kit
G007103-2	Breather Heater	Service part / kit
G007211-0	Battery Heater	Service part / kit
G007216-0	Scheduled Maintenance Kit	Service part / kit
G009918-0	Touch-Up Paint Kit	Service part / kit
Q115AF	15A Single Pole AFCI	Service part / kit
Q120AF	20A Single Pole AFCI	Service part / kit
0G0767A	Spark Plug (RC12YC or equivalent)	Spark plug
RC12YC	Recommended Spark Plug	Spark plug

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 G-Force 800 Series?

The Generac G-Force 800 Series engine has an oil capacity of 2.1 liters.

What is the displacement of the Generac G-Force 800 Series?

The Generac G-Force 800 Series has a displacement of 0.816 liters with 2 cylinders.

Which generators use the Generac G-Force 800 Series engine?

The Generac G-Force 800 Series powers 16 generator set(s), including Generac G007173-0, Generac G007174-0, Generac G007175-0, Generac G007176-0, Generac G007177-0.

How often should you change the oil in the Generac G-Force 800 Series?

The Generac G-Force 800 Series oil change interval is every 200 hours.

What is a common problem with the Generac G-Force 800 Series engine?

A commonly reported issue on generators using the Generac G-Force 800 Series is: Unit will not start in AUTO with utility loss — LED RED. Cause: Check LEDs / screen for alarms.. Fix: Check oil level and add oil as needed. If oil level is correct, contact an IASD..