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Generac G-Force™ Série 400 Engine

The Generac G-Force™ Série 400 is a 0.46 L engine. It powers generator sets from Generac, including the G0072100. It holds 1.03 L (0.3 gal) of oil.

Also known as: G-Force™ série 400, Generac G-Force™ Série 400

Part of the Generac G-Force 400 engine family — 5 variants share parts & fitment.

0.46 L

Displacement

1.03 L

Oil capacity

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

Engine specifications

Oil capacity	1.03 L
Displacement	0.46 L

Generator sets powered by this engine

Generac G0072100

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.
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 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.
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.
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.
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
Unit will not start in AUTO with utility loss — LED NONE NOT ACTIVATED
Cause: Check if screen says unit not activated.
Fix: See Activation section in installation manual.
Unit will not start in AUTO with utility loss — LED GREEN
Cause: Check screen for start delay countdown.
Fix: If startup delay is greater than expected, contact an IASD to adjust from 2 to 1500 seconds.
Unit was running and shut down, attempts to restart — LED RED RPM SENSE LOSS
Cause: Check LEDs / screen for alarms.
Fix: Clear alarm and remove household loads from generator. Put into AUTO and restart. If generator does not start, contact an IASD.

Compiled from service & troubleshooting documentation across every generator set that uses the Generac G-Force™ Série 400.

Maintenance schedule

Item	Spec	Capacity	Part #	Interval
Air filter			0E9371A	400 hr	Amazon eBay $19.99
Oil filter			070185E	500 hr	Amazon eBay $30.00 NAPA $9.09 FridayParts $45.99
Battery	12 V, Grupo 26R, célula úmida 540 CCA mínimo; alternativa Grupo 35 AGM 650 CCA mínimo		0H3421S		Amazon eBay $283.32
Oil	Generac 5W-20 exclusive; conforme aux exigences minimales API SJ, SL ou mieux; ne pas utiliser d'additifs	1.03 L	—	500 hr
Spark plug	Écartement 1,02 mm (0,040 po)		0G0767A	400 hr	Amazon eBay $18.00

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
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.
Engine oil	Change	25 hr		First service — After the 25 hour break-in period, use Generac 5W-20 GEO for continuous use
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
Battery condition	Check	200 hr	24 mo	Schedule A.
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.
Bujía(s)	Replace	400 hr	48 mo	Programa B: cada cuatro años o 400 horas.
Engine air filter	Replace	400 hr	48 mo	Schedule B. Emissions-critical.
Engine oil and oil filter	Change	400 hr	48 mo	First service — 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
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(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
Condición de la batería	Inspect		12 mo	Anualmente (revisión de batería y carga).
Enclosure louvers	Inspect		12 mo	Remove any shrubs or tall grasses within 3 ft (0.91 m) of intake/discharge louvers; clean accumulated debris inside enclosure.
Fuel system	Test		12 mo	Perform fuel system leak test from supply to regulator.
Lines and connections (fuel and oil)	Inspect		12 mo	Inspect for fuel or oil leaks.
Prueba de fugas del sistema de combustible	Test		12 mo	Anualmente.
Sistema de combustível	Test		12 mo	Teste de vazamento; todos os anos
Water intrusion	Inspect		12 mo	Verify water sprinklers, roof run-off, downspouts and sump pump discharges are directed away from generator enclosure.

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	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)	in (mm)
Gap	Spark plug gap	0.040 in (1.02 mm)	in (mm)
Gap	Spark plug gap (10 kW)	0.020	in (0.508 mm)
Gap	Spark plug gap (14-24 kW)	0.040	in (1.02 mm)
Gap	Écartement de bougie	0,508	mm (0,020 po)
Gap	Écartement de bougie	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	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	Tamanho mínimo de tanque de PL ao converter de GN	946	L (250 gal)
Pressure	Fuel pressure at regulator, LP gas	10-12 in water column (2.49-2.99 kPa)	in water column (kPa)
Pressure	Fuel pressure at regulator, NG	3.5-7.0 in water column (0.87-1.74 kPa)	in water column (kPa)
Pressure	Fuel pressure to regulator (LP)	10-12	in water column (2.49-2.99 kPa)
Pressure	Fuel pressure to regulator (NG)	3.5-7.0	in water column (0.87-1.74 kPa)
Pressure	LP gas required fuel pressure at generator fuel inlet	10–12 in water column (2.49–2.99 kPa)	in water column
Pressure	Natural gas required fuel pressure at generator fuel inlet	3.5–7.0 in water column (0.87–1.74 kPa)	in water column
Pressure	Presión del combustible (GN)	0.87 a 1.74	kPa (3.5 a 7.0 pulg. de columna de agua)
Pressure	Presión del combustible (PL)	2.49 a 2.99	kPa (10 a 12 pulg. de columna de agua)
Pressure	Pression de carburant GN à l’entrée du vapo-détendeur	0,87 à 1,74	kPa (3,5 à 7,0 poH2O)	GN
Pressure	Pression de carburant GPL à l’entrée du vapo-détendeur	2,49 à 2,99	kPa (10 à 12 poH2O)	GPL
Pressure	Pressão do combustível (GN) para o regulador	0,87–1,74	kPa	gás natural
Pressure	Pressão do combustível (GN) para o regulador	3,5–7,0	pol de coluna de água	gás natural
Pressure	Pressão do combustível (PL) para o regulador	10–12	pol de coluna de água	gás PL
Pressure	Pressão do combustível (PL) para o regulador	2,49–2,99	kPa	gás PL
Speed	Duração do ciclo de exercício	5	minutos	extensão do tempo de exercício
Speed	Frecuencia de salida del generador (E1 a E2)	59.5 a 60.5	Hz	con el generador funcionando
Speed	Generator output frequency (E1-E2)	59.5–60.5	Hz	during electrical checks
Temperature	Cold weather kit recommended below	32	F (0 C)
Temperature	Faixa de operação normal	-20 a 122	°F	testado conforme UL 2200
Temperature	Faixa de operação normal	-29 a 50	°C	testado conforme UL 2200
Temperature	Normal operating range (tested to UL 2200)	-20 F to 122 F (-29 C to 50 C)	F (C)
Temperature	Ponto de ajuste Cold Smart Start	-7	°C	22/24 kW
Temperature	Ponto de ajuste Cold Smart Start	10	°C	10 kW a 20 kW
Temperature	Ponto de ajuste Cold Smart Start	20	°F	22/24 kW
Temperature	Ponto de ajuste Cold Smart Start	50	°F	10 kW a 20 kW
Temperature	Rango de funcionamiento normal (UL 2200)	-29 a 50	°C (20 a 122 °F)
Temperature	Rated operating temperature range	-20 F to 122 F	(-29 C to 50 C)	per UL 2200 test
Torque	Barra colectora de neutro	2.26	Nm (20 lb-pulg.)	10 a 14 AWG
Torque	Barra colectora de neutro	2.82	Nm (25 lb-pulg.)	8 AWG
Torque	Barra colectora de neutro	3.95	Nm (35 lb-pulg.)	4 a 6 AWG
Torque	Battery cable connections	70 in-lbs (8 Nm)	in-lbs
Torque	Bougies d’allumage	25	Nm (18,4 pi-lb)
Torque	Bujía(s)	25	Nm (18.4 lb-pie)
Torque	Cables de la batería (positivo y negativo)	8	Nm (70 lb-pulg.)
Torque	Contraporca do braço oscilante	174	pol-lb	20 a 24 kW
Torque	Contraporca do braço oscilante	19,68	Nm	20 a 24 kW
Torque	Contraporca do braço oscilante	53	pol-lb	10 kW
Torque	Contraporca do braço oscilante	6,0	Nm	10 kW
Torque	Contratuerca del balancín	19.68	Nm (174 lb-pulg.)

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
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	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
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 (vapor), minimum 2,500 BTUs per ft3 (93.15 megajoules per m3)			Vapor withdrawn liquid propane.
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 (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, 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.
Fuel	Natural gas: at least 1,000 BTU/ft3 (37.26 MJ/m3); LP gas: at least 2,500 BTU/ft3 (93.15 MJ/m3)			LP gas should only use a vapor withdrawal system
Fuel	Propano líquido (vapor)	Contenido de BTU de al menos 93.15 MJ/m3 (2,500 BTU/pie3); presión de suministro 2.49 a 2.99 kPa (10 a 12 pulg. de columna de agua) en la entrada de combustible	946.0 L (tamaño mínimo de tanque recomendado, 250 gal)	Solo sistema de recuperación de vapor. No conectar a un tanque de propano líquido de 20 o 30 lb (9 o 14 kg).
Other		Água destilada (baterias não lacradas)		Encha apenas com água destilada; NÃO use água comum de torneira
Other	Solución de bicarbonato de sodio		454.0	Agente neutralizante de ácidos para derrames de electrolito de batería.

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
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 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	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	High Engine Temp	Unit shuts down during operation. Red LED.	Shutdown	Inspect ventilation around generator, intake, exhaust, and rear of generator. If no obstructions are present, contact an 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	Bateria baixa	LED amarelo aceso em qualquer estado.	Warning	Apague o alarme. Verifique a bateria no BATTERY MENU. Se GOOD, entre em contato com uma IASD. Se CHECK BATTERY, troque a bateria.
LOW OIL PRESSURE	Low Oil Pressure	Unit will not start in AUTO with utility loss. Red LED.	Shutdown	Check oil level and add oil as needed. If oil level is correct, contact an IASD.
LOW VOLTS REMOVE LOAD	Low Volts Remove Load	Unit will not start in AUTO with utility loss. Red LED.	Shutdown	Clear alarm and remove household loads. Put in 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	Overcrank	Unit will not start in AUTO with utility loss. Red LED.	Shutdown	Verify fuel line shutoff valve is ON. Clear alarm. Start unit in MANUAL. If it does not start or runs rough, contact an IASD.
OVERLOAD REMOVE LOAD	Overload Remove Load	Unit shuts down during operation. Red LED.	Shutdown	Clear alarm and remove household loads from generator. Put 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. Red LED.	Shutdown	Contact an IASD.
OVERVOLTAGE	Overvoltage	Unit will not start in AUTO with utility loss. Red LED.	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	Unit was running and shut down, attempts to restart. Red LED.	Shutdown	Clear alarm and remove household loads. Put into AUTO and restart. If generator does not start, contact an IASD.
SERVICE A	Service Schedule A	Yellow LED illuminated in any state.	Warning	Perform SERVICE A maintenance. Press ENTER to clear.
SERVICE B	Service Schedule B	Yellow LED illuminated in any state.	Warning	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. Red LED.	Shutdown	Contact an IASD.
UNDERSPEED	Underspeed	Unit will not start in AUTO with utility loss. Red LED.	Shutdown	Contact an IASD.
UNDERVOLTAGE	Undervoltage	Unit will not start in AUTO with utility loss. Red LED.	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	Wiring Error	Unit will not start in AUTO with utility loss. Red LED.	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

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

Remove spark plug wire(s) and position away from spark plug(s).
Remove spark plug(s).
Remove the four screws attaching 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 units) or 13 mm wrench (20-24 kW units).
Turn pivot ball stud using a 14 mm wrench (10 kW) or 10 mm hex key (20-24 kW) while checking clearance with a feeler gauge.
Hold pivot ball stud and tighten rocker arm jam nut.
Inspect valve clearance to verify it did not change.
Install new valve cover gasket and valve cover; tighten fasteners in a cross pattern.
Install spark plug(s) and tighten to 18 ft-lbs (25 Nm); attach spark plug wires.
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).

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.

Fuel Conversion (NG to LP) adjustment

⚠ Fuel and vapors are extremely flammable and explosive; no leakage permitted.

Turn fuel conversion knob toward marked fuel source arrow until it stops (rotates 180° and slides into mixer body).
Enter fuel selection (LP/NG) on controller using Install Wizard or EDIT menu under Fuel Selection.

Verificar a folga das válvulas adjustment

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

⚠ Partida acidental. Desconecte o cabo negativo da bateria primeiro.

Tools: Calibrador, Chave de soquete, Soquete grande

Feche a válvula de combustível e desconecte a bateria para evitar inicialização acidental.
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 (ambas as válvulas fechadas).
Verifique a folga entre o braço oscilante (E) e a haste da válvula (F) com um calibrador.
Instale a nova junta e a tampa da válvula; aperte os fixadores em padrão transversal.

Ejecución de prueba de fugas del sistema de combustible diagnostic

⚠ Todo el sistema de combustible debe comprobarse desde el suministro al regulador.

Tools: Fluido de detección de fugas de gas no corrosivo

Realice una prueba final en el sistema de combustible después de instalar el generador.
Rocíe todos los puntos de conexión con un fluido de detección de fugas de gas no corrosivo.
Verifique que la solución no se esparza por el aire ni forme burbujas.

Electrical Checks diagnostic

⚠ High voltage is present at transfer switch and terminals.

Tools: Calibrated AC voltmeter, Frequency meter, Manometer

Verify generator is in OFF mode and set MLCB to OFF (OPEN).
Turn off all circuit breakers/loads to be supplied by generator.
Turn on utility power supply to transfer switch.
Verify utility voltage across N1 and N2 (should be 240 VAC).
Verify line-to-neutral voltage (should be 120 VAC).
Press MANUAL button; record cranking fuel pressure.
Warm up five minutes, set MLCB to ON (CLOSED); record running fuel pressure.
Verify E1-E2 voltage (238–242 V) at 59.5–60.5 Hz.
Set MLCB to OFF and press OFF mode button to shut down.

Generator Tests Under Load diagnostic

⚠ Do not manually transfer under load.

Tools: Calibrated AC voltmeter, Frequency meter, Manometer

Verify generator in OFF mode and set MLCB to OFF (OPEN).
Turn off all breakers/loads.
Turn off utility power to transfer switch.
Manually set transfer switch to STANDBY (load to E1/E2).
Press MANUAL button to start engine; record cranking fuel pressure.
Warm up, record running fuel pressure.
Set MLCB to ON (CLOSED); turn on loads one by one.
Verify approximately 240 volts and 60 Hz.
Run at full rated load 20–30 minutes; inspect for leaks/overheating.
Record loaded fuel pressure.
Turn off loads and set MLCB to OFF.
Run at no-load 2–5 minutes; press OFF.

Pruebas del generador con carga diagnostic

⚠ No transfiera manualmente bajo carga. Desconecte el interruptor de transferencia de todas las fuentes antes de la transferencia manual.

Tools: Voltímetro de CA, Medidor de frecuencia, Manómetro de combustible

Verifique que el generador esté en modo OFF y el MLCB en OFF (ABIERTO).
Apague todos los disyuntores y cargas; cierre el suministro de energía eléctrica al interruptor de transferencia.
Ajuste manualmente el interruptor de transferencia en STANDBY; la palanca debe estar hacia abajo.
Presione MANUAL; el motor arrancará; verifique y registre la presión de arranque del combustible.
Deje estabilizar y calentar el motor; registre la presión de funcionamiento.
Cierre el MLCB del generador; encienda las cargas una a una.
Verifique voltaje (~240 V) y frecuencia (~60 Hz) en E1-E2.
Haga funcionar con carga nominal plena de 20 a 30 minutos e inspeccione fugas de aceite o sobrecalentamiento.
Registre la presión del combustible con carga plena; apague cargas y disyuntores.
Ajuste el MLCB en OFF, deje enfriar sin carga 2 a 5 minutos y presione OFF.

Revisiones eléctricas diagnostic

⚠ Alto voltaje presente en el interruptor de transferencia y los terminales.

⚠ No continúe hasta que la frecuencia y el voltaje de CA del generador sean correctos y estén dentro de los límites.

Tools: Voltímetro de CA calibrado, Medidor de frecuencia calibrado, Manómetro de combustible

Verifique que el generador esté en modo OFF y el MLCB del generador en OFF (ABIERTO).
Apague todos los disyuntores y cargas; abra el suministro de energía eléctrica al interruptor de transferencia.
Con un voltímetro de CA verifique N1 a N2 (debe ser 240 V CA) y N1/N2 a neutro (120 V CA).
Presione MANUAL; el motor girará y arrancará; registre la presión de arranque del combustible.
Deje calentar cerca de cinco minutos, luego cierre el MLCB del generador y registre la presión de funcionamiento.
Con voltímetro y medidor de frecuencia verifique E1 a E2 (238 a 242 V, 59.5 a 60.5 Hz) y E1/E2 a neutro (119 a 121 V CA).
Ajuste el MLCB del generador en OFF y presione OFF; el motor se apagará.

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	Connection	Leads	Notes
	Neutral for battery charger	WHITE NEU/00	Must be connected to keep battery charged whether unit is running or not
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 VAC	Utility dropout and pickup sensing	YELLOW N1 & N2

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 400 family

Part #	Description	Category
0E9371A	Air Filter	Air filter
0E9371AS	Air filter	Air filter
0J8478	Air Filter	Air filter
0J8478S	Air filter	Air filter
G005819-0	26R Wet Cell Battery	Battery
0C2979	GASKET, VALVE COVER	Gasket
0K8946	Joint de cache-culbuteurs	Gasket
10000014927	Joint de cache-culbuteurs	Gasket
070185E	Oil Filter	Oil filter
070185ES	Filtre à huile recommandé	Oil filter
0D7178T	Control panel fuse	Service part / kit
0H3421S	26R Exide battery	Service part / kit
G005621-0	Auxiliary Transfer Switch Contact Kit	Service part / kit
G005703-0	Paint Kit	Service part / kit
G006482-0	Scheduled Maintenance Kit	Service part / kit
G007000-0	Smart Management Module (50 amp)	Service part / kit
G007005-0	Wi-Fi LP Fuel Level Monitor	Service part / kit
G007006-0	Smart Management Module (100 amp)	Service part / kit
G007027-0	Fascia Base Wrap Kit	Service part / kit
G007101-0	Battery Pad Warmer	Service part / kit
G007102-0	Oil Warmer	Service part / kit
G007103-1	Breather Warmer	Service part / kit
G007169-0	Mobile Link® Cellular Accessories - 4G LTE	Service part / kit
G007170-0	Mobile Link® Cellular Accessories - Wi-Fi/Ethernet	Service part / kit
G007216-0	Scheduled Maintenance Kit	Service part / kit
0G0767A	Spark Plug (RC12YC or equivalent)	Spark plug
0G0767B	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™ Série 400?

The Generac G-Force™ Série 400 engine has an oil capacity of 1.03 liters.

What is the displacement of the Generac G-Force™ Série 400?

The Generac G-Force™ Série 400 has a displacement of 0.46 liters.

Which generators use the Generac G-Force™ Série 400 engine?

The Generac G-Force™ Série 400 powers 1 generator set(s), including Generac G0072100.

How often should you change the oil in the Generac G-Force™ Série 400?

The Generac G-Force™ Série 400 oil change interval is every 500 hours.

What is a common problem with the Generac G-Force™ Série 400 engine?

A commonly reported issue on generators using the Generac G-Force™ Série 400 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..