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Generac G-Force 500 Series Engine

Name: Generac G-Force 500 Series Engine
Brand: Generac

The Generac G-Force 500 Series is a 0.53 L 2-cylinder naturally aspirated engine rated at 3600 rpm. It powers generator sets from Generac, including the G007031-1, G007032-1, G007033-1 and G007044-0. It holds 1.6 L (0.4 gal) of oil.

Also known as: Generac G-Force 500 Series

0.53 L

Displacement

Cylinders

3600 rpm

Rated speed

1.6 L

Oil capacity

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

Engine specifications

Oil capacity	1.6 L
Displacement	0.53 L
Cylinders	2
Aspiration	Naturally aspirated
Rated speed	3600 rpm

Generator sets powered by this engine

Generac G007031-1 Generac G007032-1 Generac G007033-1 Generac G007044-0 Generac G007144-0

How to read your Generac engine serial & model number →

Common problems

Yellow LED illuminated in any state.
Fix: Check the screen for additional information. Perform SERVICE A maintenance. Press ENTER to clear.
Wiring Error ALARM 2099
Voltage and Frequency Drop Excessively When Loads Are Applied
Fix: TEST 14 - CHECK VOLTAGE AND FREQUENCY UNDER LOAD, BOTH LOW -> TEST 15 - CHECK FOR OVERLOAD CONDITION, NOT OVERLOADED -> GOOD -> IF RECONFIGURED TO LP GAS, VERIFY THAT PROPER PROCEDURE WAS FOLLOWED (REFER TO INSTALLATION MANUAL), GOOD -> OVERLOADED -> DISCONTINUE TESTING, REDUCE LOADS TO UNIT’S RATED CAPACITY, TEST 12 - CHECK STEPPER MOTOR CONTROL, GOOD -> BAD -> REPAIR OR REPLACE, LOOK FOR A SHORTED CONDITION IN A CONNECTED LOAD OR IN ONE OF THE LOAD CIRCUITS, GOOD -> TEST 7 - CHECK STATOR AC POWER WINDINGS, ENGINE CONDITION GOOD -> REPAIR OR REPLACE, BAD -> TEST 16 - CHECK ENGINE CONDITION, GOOD -> GO TO “PROBLEM 18 - ENGINE STARTS HARD AND RUNS ROUGH/LACKS POWER” SECTION 4.3
Utility voltage is detected at DC terminal block
Cause: AC utility power sense wires mistakenly connected to DC terminal block
Fix: Remove power from controller, clear warning message
Unstable Voltage or Incorrect Output Which is Not Triggering a Shutdown
Fix: TEST 1 - CHECK AC OUTPUT VOLTAGE, ERRATIC -> PROCEED TO PROBLEM 3
Unit consumes large amounts of oil.
Cause: 1. Engine over filled with oil. 2. Engine breather defective. 3. Improper type or viscosity of oil. 4. Damaged gasket, seal or hose.
Fix: 1. Adjust oil to proper level. 2. * 3. See “Engine Oil Recommendations”. 4. Check for oil leaks.
Undervoltage 1902
Stepper Overcurrent ALARM 2100
RPM Sensor ALARM 1501
Prolonged Over-Voltage Undervoltage 1900
Problem 22 – Battery is Dead Battery is Dead
Fix: Test 45 – Check Battery and Cables
Problem 21 – No Low Speed Exercise No Low Speed Exercise
Problem 20 – Generator Will Not Exercise Generator Will Not Exercise
Fix: Test 45 – Check Battery and Cables
Overspeed ALARM
Cause: Prolonged (60 Hz on a 50 Hz unit, 72Hz on 60Hz unit) Over specified Hz for 3 seconds. Possible cause: Stepper motor/mixer body assembly issue.
Overloaded ALARM 2102

Compiled from service & troubleshooting documentation across every generator set that uses the Generac G-Force 500 Series.

Maintenance schedule

Item	Spec	Capacity	Part #	Interval
Oil	Oil Capacity Including Filter	1.6 L	—

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
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
Aceite de motor y filtro de aceite	Change	200 hr	24 mo	First service — Programa de mantenimiento A
Batería (condición, nivel de electrolito y estado de carga)	Check	200 hr	24 mo	Programa de mantenimiento A
Complete Tune-Up	Other	200 hr	24 mo	Independent Authorized Dealer must perform; 2 years or 200 hours
Engine oil and oil filter	Replace	200 hr	24 mo	First service — Schedule A (Every Two Years or 200 Hours) and Schedule B (Every Four Years or 400 Hours). Change engine oil and filter after first 25 hours. In cold weather (below 40 F / 4.4 C) or continuous hot weather (above 85 F / 29.4 C), change every year or 100 hours.
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.
Air cleaner	Clean	400 hr		Clean or replace as necessary; R = Replace as Necessary; 400 hours
Bougies d'allumage	Clean	400 hr	48 mo	Nettoyer les bougies, vérifier l'écartement ou les remplacer. Calendrier A et Calendrier B.
Bujías	Replace	400 hr	48 mo	Programa B; limpiar, comprobar separación y sustituir
Engine air filter	Replace	400 hr	48 mo	Schedule B (Every Four Years or 400 Hours).
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
Jeu des soupapes	Adjust	400 hr		First service — Vérifier et régler après les 25 premières heures de fonctionnement, puis toutes les 400 heures.
Luz de válvulas	Adjust	400 hr	48 mo	First service — Programa B; inspeccionar/ajustar cada 400 horas
Spark plug(s)	Replace	400 hr		400 hours
Spark plugs	Replace	400 hr	48 mo	Every Four Years or 400 Hours (Schedule B); clean, check gap, replace
Valve clearance	Adjust	400 hr	48 mo	First service — Every Four Years or 400 Hours (Schedule B); also check/adjust after first 25 hours of operation
Batterie (état, niveau d'électrolyte et état de chargement)	Check		12 mo	Chaque année, Calendrier A (tous les deux ans ou toutes les 200 heures) et Calendrier B (tous les quatre ans ou toutes les 400 heures).
Battery	Check		12 mo	Check charge state; yearly
Battery	Clean		12 mo	Remove corrosion, ensure dryness; yearly
Battery condition, electrolyte level, and state of charge	Check		12 mo	Every Year (Schedule A and B)
Battery electrolyte level	Check		6 mo	Unsealed batteries only; every 6 months; notify Dealer if repair is needed
Battery terminals	Clean		12 mo	Clean and tighten; yearly
Fuel lines and connections	Inspect		1 mo	Monthly; notify Dealer if repair is needed
Infiltration d'eau	Check		12 mo	Chaque année.
Sediment trap	Clean		12 mo	Inspect/clean sediment trap every year; consult local codes and guidelines.
Vibration, Noise, Leakage	Inspect		1 mo	General condition; monthly; notify Dealer if repair is needed

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	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	Spark Plug Gap	0.020	in (0.508 mm)	9 kW (GH-426)
Gap	Spark Plug Gap	0.030	in (0.76 mm)	11 kW (GTH-530)
Gap	Spark Plug Gap	0.040	in (1.02 mm)	16/20/22 kW (GT-999)
Gap	Spark plug gap	0.76	mm (0.030 in)
Gap	Spark plug gap	1.02	mm (0.040 in)
Gap	Spark plug gap (11 kW)	0.030	in (0.76 mm)
Gap	Spark plug gap (16/20/22 kW)	0.040	in (1.02 mm)
Gap	Spark plug gap (9 kW)	0.020	in (0.508 mm)
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	Exercise time length (16-22 kW)	5	minutes
Other	Exercise time length (9-11 kW)	12	minutes
Other	Retardo de calentamiento con Arranque inteligente en frío	30	segundos	temperatura ambiente por debajo de la temperatura fijada
Other	Retardo de calentamiento normal	6	segundos	temperatura ambiente en o sobre la temperatura fijada
Other	Utility failure detection threshold	65	% of nominal (for five consecutive seconds)
Other	Utility restoration threshold	80	% of nominal (for 15 consecutive seconds)
Pressure	Fuel pressure at regulator - LP	10-12	in water column (19-22 mm Hg)
Pressure	Fuel pressure at regulator - Natural Gas	3.5-7.0	in water column (9-13 mm Hg)
Pressure	Fuel pressure to regulator (LP)	10-12	in water column (19-22 mm Hg)	LP gas
Pressure	Fuel pressure to regulator (NG)	3.5-7.0	in water column (9-13 mm Hg)	natural gas
Pressure	Fuel pressure to regulator (natural gas)	3.5-7	inches water column (7-13 mm mercury)
Pressure	Presión de combustible al regulador (LP)	10–12	in de columna de agua (19–22 mm de mercurio)
Pressure	Presión de combustible al regulador (gas natural)	3.5–7.0	in de columna de agua (9–13 mm de mercurio)
Pressure	Presión de combustible requerida - gas natural	3,5–7,0	pulgadas de columna de agua	En la entrada de combustible del generador (7–13 mm de mercurio)
Pressure	Presión de combustible requerida - vapor de propano líquido	10–12	pulgadas de columna de agua	En la entrada de combustible del generador (19–22 mm de mercurio)
Pressure	Pression de carburant au régulateur (gaz naturel)	9 à 13	mm Hg (3,5 à 7 po de colonne d'eau)
Pressure	Pression de carburant au régulateur (propane liquide)	19 à 22	mm Hg (10 à 12 po de colonne d'eau)
Pressure	Pression de carburant — gaz naturel	7 à 13 mm Hg (3,5 à 7 po de colonne d'eau)	mm Hg / po colonne d'eau	À l'entrée de carburant du générateur
Pressure	Pression de carburant — vapeur de propane liquide	19 à 22 mm Hg (10 à 12 po de colonne d'eau)	mm Hg / po colonne d'eau	À l'entrée de carburant du générateur
Speed	Cranking cycle	15 sec crank, 7 sec rest, then 4 cycles of 7 sec crank/7 sec rest		9 kW unit
Speed	Cranking cycle	16 sec crank, 7 sec rest, 16 sec crank, 7 sec rest, then 3 cycles of 7 sec crank/7 sec rest		11-22 kW units
Speed	Ejercitación (9/11 kW)	3600	rpm	ejercitación constante
Speed	Ejercitación de baja velocidad (16/20 kW)	2400	rpm	ejercitación
Speed	Ejercitación de baja velocidad (22 kW)	1950	rpm	ejercitación
Speed	Exercise (constant)	3600	rpm
Speed	Exercise speed (16-20 kW)	2400	rpm	low speed exercise
Speed	Exercise speed (22 kW)	1950	rpm	low speed exercise
Speed	Exercise speed (9-11 kW)	3600	rpm	exercises at constant speed
Speed	Frecuencia de salida del generador	59,5-60,5	Hz	generador en funcionamiento
Speed	Fréquence de sortie du générateur	59,5 à 60,5	Hz	Générateur en marche
Speed	Low speed exercise	1950	rpm
Speed	Low speed exercise	2400	rpm
Speed	Retardo de arranque (configurable)	2-1500	segundos
Temperature	Engine temperature for valve adjustment	60 - 80	F (16 - 27 C)
Temperature	Normal operating range	-20 to 122	F (-29 to 50 C)	UL 2200 tested operating temperature
Temperature	Temperatura fija del Arranque inteligente en frío	20	°F (-7 °C)	Modelo 22 kW
Temperature	Temperatura fija del Arranque inteligente en frío	50	°F (10 °C)	Modelos 9 kW–20 kW
Torque	Barra de bus de neutro (AWG 10-14)	20	pulgadas-libras	2,26 Nm
Torque	Barra de bus de neutro (AWG 4-6)	35	pulgadas-libras	3,95 Nm
Torque	Barra de bus de neutro (AWG 8)	25	pulgadas-libras	2,82 Nm
Torque	Barre omnibus neutre	3,95 / 2,82 / 2,26	N.m (35 / 25 / 20 po-lb)	Selon la taille du fil (4-6 AWG / 8 AWG / 10-14 AWG)
Torque	Bornes de fils d'alimentation	13,56	N.m (120 po-lb)
Torque	Bougie d'allumage	25	N.m (18,4 pi-lb)
Torque	Branchements neutre et de mise à la terre réalisés en usine	2,82	N.m (25 po-lb)
Torque	Bujía	18.4	pie-lb (25 Nm)
Torque	Cable negro de batería (NEG o -)	70	pulgadas-libras	8 Nm

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	30 weight organic oil (factory fill)				Units run and tested at factory prior to shipping, no break-in required
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	SAE 5W-30 sintético	API SJ, SL o mejor		1.03 l	9 kW; no usar aditivos especiales
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			For all temperature ranges; use no special additives
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.
Engine oil	10W-30	API Service Class SJ, SL or better	-23°C to 4°C		Between 40 and -10 F (4 and -23 C)
Engine oil	SAE 30	API Service Class SJ, SL or better	above 0°C		Above 32 F (0 C)
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	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
Fuel	Liquid Propane (LP) vapor withdrawn or pipeline Natural Gas				NG min 1000 BTU/cu ft (37.26 MJ/m3); LP min 2500 BTU/cu ft (93.15 MJ/m3); min LP tank size 250 gal (946 L) recommended if converting from NG
Fuel	Natural Gas	btu content of at least 1,000 Btus per cubic foot (37.26 megajoules per cubic meter)			Unit factory set for natural gas
Other		Fluido detector de fugas de gas no corrosivo			Para comprobación de fugas en todos los puntos de conexión durante las pruebas y el mantenimiento normal.

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
BATTERY PROBLEM	Problema de batería	Yellow LED illuminated in any state.	Warning	Contactar un IASD
CHARGER WARNING	Charger Warning	Yellow LED illuminated in any state.	Warning	Contactar un IASD
FUSE PROBLEM	Problema de fusible	Unit will not start in AUTO with utility loss. (Firmware 1.11 and older only.)	Warning	Comprobar el fusible de 7.5 A; sustituir con fusible ATO de 7.5 A si está fundido, o contactar un IASD
HIGH TEMPERATURE	High Temperature	Unit shuts down during operation.	Shutdown	Comprobar ventilación alrededor del generador (admisión, escape, parte trasera); si no hay obstrucciones, contactar un IASD
INSPECT BATTERY	Inspect Battery	Yellow LED illuminated in any state.	Warning	Inspect battery. Press ENTER to clear.
LOW BATTERY	Low Battery	Yellow LED illuminated in any state.	Warning	Desactivar la alarma; comprobar batería en BATTERY MENU; si GOOD contactar un IASD, si CHECK BATTERY sustituir la batería
LOW OIL PRESSURE	Low Oil Pressure	Unit will not start in AUTO with utility loss.	Shutdown	Comprobar el nivel de aceite y añadir si es necesario; si es correcto contactar un IASD
LOW VOLTS REMOVE LOAD	Voltaje bajo, retirar carga	Unit will not start in AUTO with utility loss.	Shutdown	Desactivar la alarma, retirar cargas domésticas, poner en AUTO y reanudar
MISWIRE	Miswire / Wiring Error	Unit will not start in AUTO with utility loss.	Shutdown	Contactar un IASD
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	Comprobar válvula de cierre de combustible; desactivar la alarma, arrancar en MANUAL; si no arranca contactar un IASD
OVERLOAD REMOVE LOAD	Sobrecarga, retirar carga	Unit shuts down during operation.	Shutdown	Desactivar la alarma, retirar cargas domésticas, poner en AUTO y volver a poner en marcha
OVERSPEED	Sobrevelocidad	Unit will not start in AUTO with utility loss.	Shutdown	Contactar un IASD
OVERVOLTAGE	Sobrevoltaje	Unit will not start in AUTO with utility loss.	Shutdown	Contactar un IASD
RPM SENSE LOSS	RPM Sense Loss	Unit was running and shuts down, attempts to restart	Shutdown	Desactivar la alarma, retirar cargas, poner en AUTO y reanudar; si no arranca contactar un IASD
SERVICE A	Servicio A	Yellow LED illuminated, maintenance due	Warning	Perform SERVICE A maintenance. Press ENTER to clear.
SERVICE B	Servicio B	Yellow LED illuminated, maintenance due	Warning	Perform SERVICE B maintenance. Press ENTER to clear.
STEPPER OVERCURRENT	Stepper Overcurrent	Unit will not start in AUTO with utility loss.	Shutdown	Contactar un IASD
UNDERSPEED	Underspeed	Unit will not start in AUTO with utility loss.	Shutdown	Contactar un IASD
UNDERVOLTAGE	Undervoltage	Unit will not start in AUTO with utility loss.	Shutdown	Contactar un 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.

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.

Conversion de carburant adjustment

⚠ Explosion et incendie. Le carburant et ses vapeurs sont extrêmement inflammables et explosifs.

Localiser le bouton orange de conversion (A).
Tourner le bouton vers la flèche indiquant la source de carburant jusqu'à l'arrêt.
Le bouton tourne sur 180° et glisse dans le corps du mélangeur pour le propane liquide.
Saisir la sélection du carburant (PL ou GN) sur l'automate de contrôle (Assistant d'installation ou menu EDIT > Fuel Selection).

Conversión de combustible adjustment

⚠ Explosiones e incendio: no se permiten fugas de combustible.

Ubique la perilla naranja de conversión de combustible (debajo del mezclador en 9 kW, sobre el mezclador en 11 kW–22 kW).
Gire la válvula hacia la marca de flecha de la fuente de combustible hasta que se detenga.
Introduzca la selección de combustible (LP/gas natural) en el controlador mediante el Asistente de instalación o el menú EDIT, 'Fuel Selection'.

Réglage du jeu des soupapes adjustment

⚠ Laisser le moteur refroidir avant d'ajuster le jeu des soupapes.

Tools: Clé à douille, Clés de 8/10/13/14 mm, Jauge d'épaisseur

Amener le piston au PMS de sa course de compression (les deux soupapes fermées).
Retirer les fils des bougies d'allumage et les écarter.
Retirer les bougies.
Retirer les quatre vis du couvercle des soupapes et jeter le joint.
Desserrer le contre-écrou du culbuteur (clé de 10 mm pour 9-11 kW ou 13 mm pour 16-22 kW).
Tourner le pivot à rotule tout en vérifiant le jeu avec une jauge d'épaisseur.
Maintenir le pivot et serrer le contre-écrou selon les spécifications.
Vérifier de nouveau le jeu.
Installer un nouveau joint sur le couvercle des soupapes.
Installer le couvercle et serrer les attaches en tracé croisé au couple spécifié.
Installer les bougies d'allumage et serrer à 25 N.m (18 pi-lb).
Rebrancher le câble de bougie.
Répéter au besoin pour l'autre cylindre.

Valve Lash Adjustment adjustment

⚠ Make sure the engine is at 60 to 80 F (16 to 27 C).

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

⚠ Start all four screws before tightening.

Tools: 10 mm Allen wrench (530 cc engine), 13 mm Allen wrench (410, 990 and 999 cc engines), feeler gauge, socket wrench

Ensure engine is cool before checking; if clearance is 0.002-0.004 in (0.05-0.1 mm), adjustment is not needed.
Remove spark plug wires and position wires away from plugs; remove spark plugs.
Ensure piston is at Top Dead Center of its compression stroke (both valves closed).
Remove the four screws attaching the valve cover.
Loosen the rocker jam nut; turn the pivot ball stud while checking clearance with a feeler gauge.
Hold the pivot ball stud in place with the Allen wrench and tighten the rocker arm jam nut to 174 in-lb (19.68 N-m).
Recheck valve clearance to make sure it did not change.
Install new valve cover gasket and re-attach the valve cover.
Torque fasteners to 6-9 ft/lb (8-12 Nm).
Install spark plugs. Torque to 15-18 ft/lb (20-25 Nm).
Re-attach the spark plug wire to the spark plug.
Repeat the process for the other cylinder, if necessary.

Vérification du jeu des soupapes adjustment

⚠ Le moteur doit être froid avant la vérification.

Tools: Clé à douille, Jauge d'épaisseur

Fermer la vanne de carburant et débrancher la batterie pour éviter un démarrage accidentel.
Retirer les fils des bougies d'allumage et les écarter.
Retirer les bougies d'allumage.
Amener le piston au point mort supérieur (PMS) de sa course de compression.

Comprobaciones eléctricas de voltaje diagnostic

⚠ Electrocución: hay alto voltaje presente en el interruptor de transferencia y los terminales.

Tools: Voltímetro de CA calibrado, Frecuencímetro, Manómetro de gas

Verifique que el generador esté apagado.
Ajuste el disyuntor principal del generador en OFF (ABIERTO).
Apague todos los disyuntores/cargas que serán alimentados por el generador.
Conecte la fuente de alimentación del servicio público al interruptor de transferencia.
Compruebe con voltímetro de CA el voltaje entre N1 y N2 (240 VCA nominal).
Compruebe el voltaje N1-neutro y N2-neutro (120 VCA nominal).
Apague el suministro de servicio público cuando confirme voltajes compatibles.
Pulse MANUAL; el motor arrancará. Registre la presión del gas durante los giros de arranque.
Deje calentar el motor cinco minutos y ajuste el MLCB en ON (CERRADO). Registre la presión del gas durante el funcionamiento.
Conecte voltímetro y frecuencímetro entre E1 y E2; el voltaje debe ser 238-242 V con 59,5-60,5 Hz.
Mida E1-neutro y E2-neutro; deben indicar 119-121 VCA.
Ajuste el MLCB en OFF (ABIERTO).
Pulse el botón OFF del generador; el motor parará.

Comprobación de las conexiones de la tubería de gas diagnostic

⚠ Explosiones e incendio: el combustible y los vapores son extremadamente inflamables y explosivos.

Tools: Manómetro, Llave Allen de 3/16 (lumbrera de prueba)

Pulverice todos los puntos de conexión con un fluido detector de fugas de gas no corrosivo; la solución no debe volar ni formar burbujas.
Cierre la válvula de suministro de combustible.
Retire la lumbrera de prueba de presión superior del regulador e instale el probador de presión de gas (manómetro).
Abra la válvula de suministro y verifique que la presión esté dentro de los valores especificados.
Registre la presión estática del gas.
Al terminar cierre la válvula de gas, pero mantenga conectado el manómetro para pruebas futuras.

Electrical Checks diagnostic

⚠ Live transfer switch parts can cause fatal electrical shock

Tools: AC voltmeter, Frequency meter

Ensure generator OFF, main breaker OFF
Turn off breakers/loads powered by generator
Turn on utility power to transfer switch
Check utility voltage across N1/N2 (240 VAC) and N1/N2 to neutral (120 VAC)
Turn off utility supply to simulate outage
Push MANUAL button to start engine
Let engine warm up 5 minutes, set main breaker ON
Check voltage across E1/E2 (238-242V at 59.5-60.5 Hz) and E1/E2 to neutral (119-121V)
Set main breaker OFF, push OFF button to shut down

Generator Tests Under Load diagnostic

Tools: AC voltmeter, Frequency meter

Ensure generator OFF, all loads off
Turn off utility power to transfer switch
Manually set transfer switch to STANDBY position
Push MANUAL button to crank and start
Let engine stabilize, set main breaker ON
Turn on loads one by one
Check voltage (~240V) and frequency (~60 Hz) across E1/E2
Run at full rated load 20-30 minutes, check for leaks/overheating
Verify gas pressure under full load
Turn off loads, set main breaker OFF, run no-load 2-5 minutes
Push OFF button to shut down

Battery Installation installation

⚠ Damage will result if battery connections are made in reverse

Verify generator turned OFF
Turn off utility power supply to transfer switch
Remove 7.5A fuse from generator control panel
Connect red battery cable to positive post
Connect black battery cable to negative post
Install red battery post cover

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
	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
	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.
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
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	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)
240 V c.a.	N1 et N2	JAUNE no 1 et no 2	Détectent les chutes et les hausses du réseau public.
240 VAC	N1 & N2 (Yellow #1 & #2)	A	Sensing for Utility Dropout and Pickup
240 VCA	N1 y N2	AMARILLO Núm. 1 y Núm. 2	Detección de desenganche y activación del servicio público
DC	0 (Black #3)	C	DC (-) Common Ground Wire

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 oil capacity of the Generac G-Force 500 Series?

The Generac G-Force 500 Series engine has an oil capacity of 1.6 liters.

What is the displacement of the Generac G-Force 500 Series?

The Generac G-Force 500 Series has a displacement of 0.53 liters with 2 cylinders.

Which generators use the Generac G-Force 500 Series engine?

The Generac G-Force 500 Series powers 5 generator set(s), including Generac G007031-1, Generac G007032-1, Generac G007033-1, Generac G007044-0, Generac G007144-0.

What is a common problem with the Generac G-Force 500 Series engine?

A commonly reported issue on generators using the Generac G-Force 500 Series is: Yellow LED illuminated in any state.. Fix: Check the screen for additional information. Perform SERVICE A maintenance. Press ENTER to clear..