Service parts for the XG04845
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredBelts
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | Natural Gas (NG) or Liquid Propane (LP) Vapor |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 48 kW |
| Emissions | EPA Emissions Certified |
| Controller | Power Zone 410 |
| Oil capacity | 11.0 L |
| Alternator | 4-lead (1-phase) or 12-lead (3-phase) stator |
| Voltage options | 240 V, 208/120 V, 240/120 V, 480/277 V |
| Phase | 1 or 3 |
| Rated current | 200 A |
| Circuit breaker | 200 A |
| Battery group | 27 (recommended), 31 (maximum) |
| Battery cranking | 600 CCA minimum (Group 27), 750 CCA minimum (Group 31 max) CCA |
| Battery voltage | 12 V V |
| Battery quantity | 1 |
| Coolant capacity | 11 L |
| Max ambient | 50 °C |
| Dimensions (L×W×H) | 2121×862×1147 mm |
| Dry weight | 689 kg |
Engine
| Oil capacity | 11.0 L |
|---|---|
| Coolant capacity | 11.0 L |
| Displacement | 4.5 L |
| Aspiration | Naturally aspirated |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the 4.5 L NA| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | 140-1347 | 150 hr | Amazon eBay $100.60 | ||
| Fuel filter | — | ||||
| Oil filter | Full flow spin-on cartridge | — | 150 hr | ||
| Battery | Group 27 recommended (600 CCA min); Group 31 maximum (750 CCA min); 12 V | — | |||
| Belt | Belt, Alternator Drive | 511-0084 | Amazon eBay | ||
| Coolant | Generac brand 50/50 ethylene glycol type coolant | 53.0 L | — | 1000 hr | |
| Oil | Generac 5W-20 Synthetic (after 25 hour break-in); factory filled with 5W-20 conventional | 40.0 L | — | 150 hr | |
| Spark plug | Gap 0.012-0.017 in (0.31-0.45 mm); torque 28 ft-lb (38 Nm) | — | 300 hr |
Service intervals
13| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Accessory drive belt | Inspect | 1000 hr | 24 mo | Schedule C: inspect for wear or damage |
| Accessory drive belt | Replace | 1000 hr | Schedule C | |
| Air filter element | Replace | 1000 hr | 24 mo | Schedule C |
| Coolant level and hoses | Inspect | 1000 hr | 24 mo | Schedule C |
| Coolant system | Drain | 1000 hr | 24 mo | Schedule C: drain/flush |
| Critical fasteners | Adjust | 1000 hr | Schedule C: tighten | |
| Enclosure slots and openings | Inspect | 1000 hr | 24 mo | Schedule C |
| Fuel hoses | Inspect | 1000 hr | 24 mo | Schedule C |
| Lubricating oil and oil filter | Replace | 1000 hr | 24 mo | First service — Schedule C |
| Lubricating oil level and drain hose | Inspect | 1000 hr | 24 mo | Schedule C |
| Radiator for clogging | Inspect | 1000 hr | 24 mo | Schedule C |
| Spark plugs | Replace | 1000 hr | 24 mo | Schedule C |
| Battery | Replace | 36 mo | Replace battery every three years; every two years in extreme conditions |
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
25| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Gap | Spark plug gap | 0.012-0.017 | in (0.31-0.45 mm) | |
| Pressure | LP fuel pressure to regulator | 7-14 | in H2O (1.74-3.48 kPa) | |
| Pressure | LP vapor fuel supply pressure to fuel shutoff valve | 7-14 | in H2O (1.74-3.48 kPa) | |
| Pressure | Maximum fuel system pressure drop (static/cranking/no-load/full-load) | 1-2 | in H2O (0.25-0.50 kPa) | |
| Pressure | NG fuel pressure to regulator | 3.5-14 | in H2O (0.87-3.48 kPa) | |
| Pressure | NG fuel supply pressure to fuel shutoff valve | 3.5-14 | in H2O (0.87-3.48 kPa) | |
| Torque | 1-phase (1 position) load lug (C, D) | 375 | in-lbs (42.37 Nm) | |
| Torque | 1-phase (1 position) lug | 375 | in-lbs (42.37 Nm) | |
| Torque | 3-phase (1 position) distribution block lug | 375 | in-lb (42.37 Nm) | |
| Torque | 3-phase (2 position) distribution block lug | 275 | in-lb (31.07 Nm) | |
| Torque | 3-phase distribution block S1, S2, S3 lug | 120 | in-lb (13.6 Nm) | |
| Torque | 3-phase distribution block, 1-position lug (A) | 375 | in-lb (42.37 Nm) | |
| Torque | 3-phase distribution block, 2-position lug (B) | 275 | in-lb (31.07 Nm) | |
| Torque | Frame breaker lug torque (Generac 225 AF 2/3 Pole) | 375 | in-lb (42.4 Nm) | |
| Torque | Generac 225 AF 2-Pole / 3-Pole frame breaker lug | 375 | in-lb (42.4 Nm) | |
| Torque | Neutral bonding wire removal nut | 200 | in-lb (22.6 Nm) | when neutral bonding wire removed |
| Torque | Neutral/ground bonding nut | 200 | in-lb (22.6 Nm) | if neutral bonding wire removed |
| Torque | S1, S2, S3 lug torque (3-phase distribution block) | 120 | in-lb (13.6 Nm) | |
| Torque | Spark plug | 28 | ft-lb (38 Nm) | |
| Torque | Voltage Configuration Cartridge (VCC) mounting screws | 55 | in-lb (6.2 Nm) | |
| Voltage | 1-phase circuit breaker terminal to neutral | 120 | V | |
| Voltage | 1-phase circuit breaker terminal to terminal | 240 | V | |
| Voltage | 3-Phase Delta config circuit breaker terminal to terminal (240/120 V VCC) | 240 | V | E1-E2, E1-E3, E2-E3 |
| Voltage | 3-Phase Y config circuit breaker terminal to terminal (208/120 V VCC) | 208 | V | E1-E2, E1-E3, E2-E3 |
| Voltage | 3-Phase Y config circuit breaker terminal to terminal (480/277 V VCC) | 480 | V | E1-E2, E1-E3, E2-E3 |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Recommended fluids
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Coolant | 50/50 Ethylene Glycol | below 50°C | 11.0 L | Coolant system capacity 2.9 US gal (11 L) | |
| Coolant | 50/50 ethylene glycol | 11.0 L | Use only Generac brand 50/50 ethylene glycol type coolant. Do not use propylene glycol. Mix ratio 40-60% antifreeze depending on ambient. | ||
| Engine oil | 5W-20 | SAE | 11.0 L | Factory filled with 5W-20 conventional; after 25 hour break-in use Generac proprietary 5W-20 Synthetic. Once synthetic is used, use for life. Do not use special additives. | |
| Fuel | Liquid Propane (LP) Vapor or Natural Gas (NG) | LP energy density >= 91,420 BTU/US gal (25.5 MJ/L); NG >= 1,036 BTU/ft3 (37.3 MJ/m3) | LP minimum tank size 250 US gal (946 L) recommended. |
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
23| Code | Name | Meaning | Severity | Action |
|---|---|---|---|---|
| BATTERY PROBLEM | Battery Problem | Yellow LED illuminated in any state. | Warning | Contact an IASD for assistance. |
| CHARGER MISSING AC | Charger Missing AC | AC input to battery charger circuit missing for greater than 5 minutes during charging cycle. | Warning | Inspect connections at transfer switch, fuses in transfer switch. Contact an IASD for assistance. |
| CHARGER WARNING | Charger Warning | Yellow LED illuminated in any state. | Warning | Contact an IASD for assistance. |
| Configuration Mismatch | Configuration Mismatch (3-Phase only) | Unit either shuts down or does not start. | Shutdown | Correct voltage configuration selection in the control panel to match installed VCC. Contact an IASD for assistance. |
| FUSE PROBLEM | Fuse Problem | Unit will not start in AUTO with utility loss. | Shutdown | Inspect 7.5 amp fuse. Replace with an ATO 7.5 amp fuse if bad; if fuse is good, contact an IASD. |
| GENERATOR EMERGENCY SHUTDOWN SWITCH | Generator Emergency Shutdown Switch | Unit either shuts down or does not start when one or both switches are OFF (O). | Shutdown | Clear alarm and verify both generator emergency shutdown switches are ON (I). |
| HIGH TEMPERATURE | High Temperature | Unit shuts down during operation. | Shutdown | Inspect ventilation around generator, intake, exhaust, and rear of generator. If no obstruction, contact an 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 | Clear alarm. Check battery option in control menu; if GOOD contact an IASD, if CHECK BATTERY replace battery. |
| LOW OIL PRESSURE | Low Oil Pressure | Unit will not start in AUTO with utility loss. | Shutdown | Check oil level / add oil per owner's manual. 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. | Shutdown | Clear alarm and remove household loads. Set to AUTO and restart. |
| NOT ACTIVATED | Not Activated | Unit will not start in AUTO with utility loss. | Info | See Checking Manual Transfer Switch Operation. |
| OVERCRANK | Overcrank | Unit will not start in AUTO with utility loss. | Shutdown | Verify fuel line shutoff valve is ON. Clear alarm. Attempt start in MANUAL. If it does not start or runs rough, contact an IASD. |
| OVERLOAD REMOVE LOAD | Overload Remove Load | Unit shuts down during operation. | Shutdown | Correct voltage configuration selection in the control panel. Clear alarm and remove household loads. Put back in AUTO and restart. |
| OVERSPEED | Overspeed | Unit will not start in AUTO with utility loss. | Shutdown | Contact an IASD for assistance. |
| OVERVOLTAGE | Overvoltage | Unit will not start in AUTO with utility loss. | Shutdown | Contact an IASD for assistance. |
| RPM SENSE LOSS | RPM Sense Loss (shutdown) | Unit was running and shuts down, attempts to restart. | Shutdown | Clear alarm and remove household loads. Set to AUTO and restart. If it does not start, contact an IASD. |
| SERVICE A | Service A | Yellow LED illuminated in any state. | Warning | Perform SERVICE A maintenance. Press ENTER to clear. |
| SERVICE B | Service B | Yellow LED illuminated in any state. | Warning | Perform SERVICE B maintenance. Press ENTER to clear. |
| STEPPER OVERCURRENT | Stepper Overcurrent | Unit will not start in AUTO with utility loss. | Shutdown | Contact an IASD for assistance. |
| UNDERSPEED | Underspeed | Unit will not start in AUTO with utility loss. | Shutdown | Contact an IASD for assistance. |
| UNDERVOLTAGE | Undervoltage | Unit will not start in AUTO with utility loss. | Shutdown | Correct voltage configuration selection in the control panel. Contact an IASD for assistance. |
| WIRING ERROR | Wiring Error | Unit will not start in AUTO with utility loss. | Shutdown | Verify wiring is installed and landed correctly. |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
12Fuel Pressure Test at Startup diagnostic
⚠ Severe valve deformation can occur if gauge probe is left in test port for hours or days.
Tools: Pressure gauge or water manometer, Gauge adapter probe (Part Number 0K2341)
- Connect a load bank (or load bank + system load) to bring unit to full rated kW load.
- Measure fuel supply pressure at test port at fuel solenoid shutoff valve under static, cranking, no-load, and full-load conditions.
- Verify pressure stays within 3.5-14 in H2O (NG) or 7-14 in H2O (LP) and drop does not exceed 1-2 in H2O.
- Tighten protective cap on test port to prevent tampering.
Connecting Load Wiring - 1-Phase Models installation
⚠ Turn utility and emergency power OFF before connecting.
- Connect load wiring to E1 & E2.
- Connect generator neutral to neutral terminal bar.
- Connect equipment ground to equipment ground lug.
- Tighten 1-phase (1 position) lugs (C) and (D) to 375 in-lb (42.37 Nm).
Connecting Load Wiring - 3-Phase Without a Circuit Breaker installation
- Route copper load wires toward end panel; keep separated from factory wiring.
- Connect generator neutral to neutral terminal bar (A).
- Connect equipment ground to equipment ground lug (B).
- Tighten 3-phase 2-position lug (B) to 275 in-lb (31.07 Nm).
- Tighten 3-phase 1-position lug (A) to 375 in-lb (42.37 Nm).
Installing the Battery installation
⚠ Explosion. Batteries emit explosive gases. Always connect positive battery cable first to avoid spark. Failure to do so could result in death or serious injury. (W000133)
- Loosen nylon strap on battery tray.
- Install battery onto tray.
- Secure nylon strap over top of battery and tighten.
- Install positive battery cable (red) to positive terminal.
- Install negative battery cable (black) to negative terminal.
Installing the Voltage Configuration Cartridge (VCC) installation
⚠ Voltage selection installer code required.
- Assemble the new VCC (B) over the terminal block (C).
- VCC is designed to install one way with the tabs aligned.
- Install the five screws to secure the VCC tabs to the terminal block.
- Tighten screws to 55 in-lb (6.2 Nm).
- Navigate to the 3-phase voltage selection in the controller.
- Select the 3-phase voltage matching the installed VCC.
- Verify the voltage in the menu.
Cleaning/Gaping/Replacing Spark Plugs maintenance
⚠ Electric shock. Do not disconnect spark plug wires with engine running. Doing so could result in death or serious injury. (W000140)
Tools: spark plug socket, wire feeler gauge, wire brush
- Remove negative battery cable.
- Remove spark plug cables from terminals.
- Clean area around spark plugs.
- Remove spark plugs with spark plug socket.
- Inspect threads; clean with thread chaser if needed.
- Clean spark plugs with wire brush and solvent; do not blast.
- Inspect gap with wire feeler gauge; gap 0.012-0.017 in (0.31-0.45 mm).
- Adjust gap by bending ground electrode.
- Finger tighten spark plugs; tighten to 28 ft-lb (38 Nm) with socket.
- Install spark plug cables; verify captured in clips.
Draining and Flushing Coolant System maintenance
⚠ Risk of burns. Allow engine to cool before draining oil or coolant. Failure to do so could result in death or serious injury. (W000139)
Tools: wrenches, container, funnel
- Disconnect and empty coolant overflow reservoir.
- Rotate and remove plastic cover at top of enclosure.
- Slowly unscrew radiator cap.
- Locate drain screw at bottom left of radiator; open drain.
- Remove coolant drain hose from clamp; remove plug; drain coolant.
- Install drain plug and hose; close radiator drain screw.
- Fill radiator with de-ionized or distilled water and flushing product; use 2.9 US gal (11 L).
- Install radiator cap.
- Press MANUAL to start engine; run until thermostat opens.
- Inspect hoses for leaks; press OFF; allow engine to cool.
- Repeat steps 4-19 to drain.
- Add recommended coolant; top off radiator and overflow bottle.
Inspecting Accessory/Drive Belt maintenance
- Inspect belt for cracks, fraying, excessive wear, or damage.
- Verify belt is free of grease and oil.
- Replace belt if contaminated, damaged, frayed, or worn.
- Inspect belt and rotating components.
Preparing For Storage maintenance
Tools: wrenches, container
- Open viewing window.
- Press MANUAL to start engine; blue LED illuminates.
- Allow engine to reach normal operating temperature.
- Press OFF; red LED illuminates.
- Set generator MLCB to OFF (OPEN), if equipped.
- Remove 7.5 amp fuse.
- Turn off utility power to transfer switch.
- Place DO NOT OPERATE tag.
- Wait five minutes for engine to cool.
- Remove front access panel.
- Remove oil drain hose from holding clamp; drain oil.
- Install oil drain plug and hose.
- Remove oil filter; coat new filter gasket with oil.
- Install oil filter; tighten 3/4 to 1 full turn.
- Fill engine with recommended oil; install oil fill cap.
Removing Battery maintenance
⚠ Electrical shock. Disconnect battery ground terminal before working on battery or battery wires. Failure to do so could result in death or serious injury. (W000164)
- Remove negative battery cable from negative terminal.
- Remove positive battery cable from positive terminal.
- Install rubber protective cover over positive terminal.
- Release buckle on nylon strap securing battery.
- Grasp battery strap and lift battery from tray.
- Remove rubber protective cover from positive terminal.
Replacing Air Filter Element maintenance
Tools: wrenches
- Remove nut and bolt from air filter clamp; loosen elbow clamp.
- Remove air filter element and discard.
- Clean elbow of dust, dirt, or debris.
- Place new air filter element into elbow clamp.
- Install elbow clamp and tighten; install nut and bolt; tighten until snug.
Replacing Lubricating Oil and Oil Filter maintenance
⚠ Risk of burns. Allow engine to cool before draining oil or coolant. Failure to do so could result in death or serious injury. (W000139)
Tools: wrenches, container, shop towel
- Follow Removing From Service; wait at least 10 minutes.
- Remove oil drain hose from holding clamp.
- Use two wrenches to remove oil drain plug; drain oil.
- Install oil drain plug and hose into holding clamp.
- Turn oil filter counterclockwise to remove; wipe adapter.
- Apply clean engine oil to gasket of new oil filter.
- Install oil filter by hand until gasket contacts; tighten 3/4 to 1 full turn.
- Fill engine with 11.6 qt (11 L) recommended oil for 4.5 L NA.
- Install oil fill cap.
- Connect negative battery cable; install 7.5 amp fuse.
- Press MANUAL to start; run one minute; inspect for leaks.
- Press OFF; wait 10 minutes; check oil level and add as needed.
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 |
|---|---|---|---|---|
| 208/120 | 3 (Y) | 3-Phase Alternator Y Configuration, 12 lead | E1, E2, E3, S1-S12 | 208/120 V VCC installed |
| 208/120 V | 3 (Y) | 12-lead stator, Y configuration with 208/120 V VCC (factory default) | S1-S12, E1, E2, E3 | Rated voltage E1-E2, E1-E3, E2-E3 is 208V; each terminal to neutral (00) is 120V. |
| 240 VAC 1-phase | 1 | Four-lead stator factory-connected to main circuit breaker | E1, E3, 00 (neutral), 11/22/33/44 | Rated voltage between each breaker terminal and neutral (00) is 120V; between breaker terminals is 240V. |
| 240/120 | 1 | Four-Lead 1-Phase Stator | E1, E3, neutral point 00 | Rated voltage between each circuit breaker terminal is 240V; between each terminal and neutral point 00 is 120V |
| 240/120 | 3 (Delta) | 3-Phase Alternator Delta Configuration, 12 lead | E1, E2, E3, NB, S1-S12 | E2 to NB (high leg) is 208V; E1-00 and E3-NB approx 120V |
| 240/120 V | 3 (Delta, high leg) | 12-lead stator, Delta configuration with 240/120 V VCC | S1-S12, E1, E2, E3, NB | Rated voltage E1-E2, E1-E3, E2-E3 is 240V; E2-NB (high leg) is 208V; E1-00 and E3-NB approx. 120V. |
| 480/277 | 3 (Y) | 3-Phase Alternator Y Configuration, 12 lead | E1, E2, E3, S1-S12 | 480/277 V VCC |
| 480/277 V | 3 (Y) | 12-lead stator, Y configuration with 480/277 V VCC | S1-S12, E1, E2, E3 | Rated voltage E1-E2, E1-E3, E2-E3 is 480V; each terminal to neutral (00) is 277V. |
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
How many kW is the Generac XG04845?
The Generac XG04845 is rated 48 kW standby.
Which engine powers the Generac XG04845?
The Generac XG04845 is powered by the 4.5 L NA engine.
What fuel does the Generac XG04845 use?
The Generac XG04845 runs on Natural Gas (NG) or Liquid Propane (LP) Vapor.
What's the oil capacity on a Generac XG04845?
The None 4.5 L NA engine in the Generac XG04845 has an oil capacity of 11.0 liters.
What is the coolant capacity of the Generac XG04845?
The Generac XG04845 cooling system holds 11 liters (2.9 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
What is the dry weight of the Generac XG04845?
The Generac XG04845 has a dry weight of 689 kg (1518 lb).
What voltage does the Generac XG04845 produce?
The Generac XG04845 is offered in 240 V, 208/120 V, 240/120 V, 480/277 V, 1 or 3-phase.
How many cold cranking amps does the Generac XG04845 require?
The Generac XG04845 uses 1 battery, 12 V V each, 600 CCA minimum (Group 27), 750 CCA minimum (Group 31 max) CCA, group 27 (recommended), 31 (maximum), per the manufacturer specification sheet.
Which alternator is fitted to the Generac XG04845?
The Generac XG04845 uses a 4-lead (1-phase) or 12-lead (3-phase) stator alternator.
Which air filter part number does the Generac XG04845 take?
The Generac XG04845 uses air filter part number 140-1347.
Troubleshooting
6Symptoms & remedies
| Symptom | Remedy |
|---|---|
| Engine stops cranking and fault lamp lights, after cranking approximately 75 seconds. | See engine service manual for troubleshooting fuel system. After correcting problem, reset engine monitor relay by placing Run-Stop/Reset-Remote switch to Stop/Reset, then back to the required running position. |
| Fault lamp lights immediately after engine starts. | Check for: Overspeed condition as engine starts. |
| Fault lamp lights and engine shuts down after running for a period. | A. Oil level. Engine will shut down if sensor is closed. b. Check engine manual for troubleshooting oil system. c. High engine temperature. Check coolant level; check water flow (city water cooled systems); check radiator for free air flow, and fan belts for tightness. See engine manual for troubleshooting cooling system. d. Check for faulty oil pressure sensor or faulty high engine temperature sensor. |
| Engine runs, shuts down and cranks for 75-seconds. Cranking cycle stops; fault lamp lights. | Check fuel supply. |
| Fault lamp lights, no fault exists. | To check a no-fault condition, disconnect leads from T B I l terminals 29, 30 and 31. If fault lamp lights with leads disconnected, replace engine monitor board. Reconnect leads. |
| Overcrank fault lamp lights and engine stops cranking after approximately 75-seconds. | See engine service manual for troubleshooting fuel system. After correcting fault, reset engine monitor relay by placing Run-Stop/Reset-Remote switch to Stop/Reset position, depressing Reset button, then to the required running position. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Generac XG04845 troubleshooting guide (16 entries) →
Repair guides
13- Cleaning/Gaping/Replacing Spark Plugs
- Connecting Load Wiring - 1-Phase Models
- Connecting Load Wiring - 3-Phase Without a Circuit Breaker
- Draining and Flushing Coolant System
- Fuel Pressure Test at Startup
- Inspecting Accessory/Drive Belt
- Installing the Battery
- Installing the Voltage Configuration Cartridge (VCC)
- Preparing For Storage
- Removing Battery
- Replacing Air Filter Element
- Replacing Lubricating Oil and Oil Filter
- Starting and Running Engine
Step-by-step procedures compiled from the Generac service manual for this model.
Parts
59| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 140-1347 | Cap, Air Cleaner | 1 | Air filter | Amazon eBay $100.60 |
| 155-1035 | Cleaner, Air | 1 | Air filter | Amazon eBay |
| 191-0688 | Alternator - Includes Regulator (Motorola #70D44039B04) | 1 | Alternator | Amazon eBay NAPA $373.20 |
| 191-0725 | Guard, Belt | 1 | Belt | Amazon eBay |
| 191-0781 | Pulley - Alternator Drive | 1 | Alternator | Amazon eBay |
| 191-0852 | Starter (24 Volt) | 1 | Starter | Amazon eBay |
| 193-0108 | Sender, Oil Pressure Gauge | 1 | Sensor | Amazon eBay $119.99 |
| 193-0244 | Sender, Pressure - 0i1 | 1 | Sensor | Amazon eBay |
| 309-0178 | Switch, High Water Temperature Alarm - Optional | 1 | Sensor | Amazon eBay $350.00 |
| 501-0087 | Hose, Vent | 1 | Hose | Amazon eBay FridayParts $101.99 |
| 503-0197 | Clip, Hose | 1 | Hose | Amazon eBay $7.99 |
| 503-0354 | Clamp, Hose | 4 | Hose | Amazon eBay |
| 503-0641 | Hose, Flexible Air Cleaner | 1 | Hose | Amazon eBay |
| 503-0748 | Clamp, Hose - Air Cleaner | 1 | Air filter | Amazon eBay |
| 503-0752 | Hose, Radiator | 1 | Hose | Amazon eBay |
| 503-0756 | Hose, Radiator (Lower) | 1 | Hose | Amazon eBay |
| 511-0084 | Belt, Charging Alternator | 1 | Belt | Amazon eBay |
| G0079910 | Regular maintenance kit includes oil filter, oil funnel, air filter, and spark plugs. | 1 | Air filter | Amazon Amazon eBay eBay |
| G0099160 | Containment pan to capture all engine oil and coolant. Kit includes a sensor to detect the presence of fluid in the pan then displays a warning on the controller screen. The G0089370 Power Zone 410 I/O Extender Kit is required for the sensor installation. | 1 | Sensor | Amazon eBay |
| 130-0843 | Bracket, Radiator Support | 2 | Service part / kit | Amazon eBay FridayParts $22.80 |
| 130-0846 | Shroud, Radiator Fan | 1 | Service part / kit | Amazon eBay |
| 130-0924 | Guard, Radiator Fan | 1 | Service part / kit | Amazon eBay |
| 130-0992 | Radiator | 1 | Service part / kit | Amazon eBay |
| 140-1349 | Cable, Battery Positive | 1 | Service part / kit | Amazon eBay |
| 191-1141 | Bracket, Alternator Mounting | 1 | Service part / kit | Amazon eBay |
| 309-0169 | 1 Begin Spec G 25 26 | 1 | Service part / kit | Amazon eBay |
| 504-0028 | Valve, Radiator Drain | 1 | Service part / kit | Amazon eBay |
| G0056510 | Base plugs to fit in the lifting holes of the baseframe to keep debris out. | 1 | Service part / kit | Amazon Amazon eBay $20.68 eBay $20.68 |
| G0070001 | 50 A Load Manager helps optimize the performance of the standby generator by managing large electrical loads upon startup and shed them to aid in recovery when overloaded. | 1 | Service part / kit | Amazon Amazon eBay $69.99 eBay $125.00 |
| G0070061 | 100 A Load Manager helps optimize the performance of the standby generator by managing large electrical loads upon startup and shed them to aid in recovery when overloaded. | 1 | Service part / kit | Amazon Amazon eBay $300.00 eBay |
| G0070090 | The Propane Tank Fuel Level Monitor connects to 4G LTE cellular service to measure and report the amount of LP fuel remaining in the tank. The app alerts the user of both remaining LP fuel and usage reports. | 1 | Service part / kit | Amazon Amazon eBay $157.99 eBay $157.99 |
| G0074110 | 3-Phase Voltage Sensing Kit for 208/120 & 240/120 V RTS Transfer Switch | 1 | Service part / kit | Amazon Amazon eBay eBay |
| G0074120 | 3-Phase Voltage Sensing Kit for 480/277 V RTS Transfer Switch | 1 | Service part / kit | Amazon Amazon eBay eBay |
| G0079920 | Battery Heater Kit | 1 | Service part / kit | Amazon Amazon eBay eBay |
| G0079930 | Enclosure Mounted Emergency Stop Kit | 1 | Service part / kit | Amazon Amazon eBay eBay |
| G0089360 | The Gateway provides an Ethernet connection port for the generator for a Building Management System (BMS). The Gateway is NOT intended for or able to be used with Mobile Link or Fleet. | 1 | Service part / kit | Amazon eBay |
| G0089370 | The kit expands I/O for the Power Zone 410 controller to provide connections for additional accessories. It connects to the controller with a 3-wire RS-485 interface. | 1 | Service part / kit | Amazon eBay |
| G0098511 | Remote annunciator panel with relays. The panel mounts in the structure that is connected to the backup generator. | 1 | Service part / kit | Amazon eBay $149.00 |
| G0098521 | Remote relay panel without LEDs or keypad. The panel mounts in the structure that is connected to the backup generator. | 1 | Service part / kit | Amazon eBay $157.49 |
| G0098531 | Remote annunciator panel without relays. The panel mounts in the structure that is connected to the backup generator. | 1 | Service part / kit | Amazon eBay $199.99 |
| G0099010 | Voltage Configuration Cartridge (VCC) for 208/120 V 3-phase output. It is INSTALLED in every 3-phase XG03245, XG04045, and XG04845 model. Offered as an accessory if a replacement is needed for any reason. | 1 | Service part / kit | Amazon eBay |
| G0099020 | Voltage Configuration Cartridge (VCC) for 240/120 V 3-phase output. It is NOT included with any XG03245, XG04045, or XG04845 model. | 1 | Service part / kit | Amazon eBay |
| G0099030 | Voltage Configuration Cartridge (VCC) for 480/277 V 3-phase output. It is NOT included with any XG03245, XG04045, or XG04845 model. | 1 | Service part / kit | Amazon eBay |
| G0099040 | 3-pole, 60 A CB and mounting hardware (typical for 32 kW, 480/277 V 3-phase generator). | 1 | Service part / kit | Amazon eBay |
| G0099050 | 3–pole, 80 A CB and mounting hardware (typical for 48 kW, 480/277 V 3-phase generator). | 1 | Service part / kit | Amazon eBay |
| G0099060 | 3-pole, 100 A CB and mounting hardware (typical for 32 kW, 240/120 V 3-phase generator). | 1 | Service part / kit | Amazon eBay |
| G0099070 | 3–pole, 125 A CB and mounting hardware (typical for 32 kW, 208/120 V; and 40 kW, 240/120 V 3-phase generators). | 1 | Service part / kit | Amazon eBay |
| G0099080 | 3–pole, 150 A CB and mounting hardware (typical for 40 kW, 208/120 V and 48 kW, 240/120 V 3-phase generators). | 1 | Service part / kit | Amazon eBay |
| G0099090 | 3–pole, 175 A CB and mounting hardware (typical for 48 kW, 208/120 V 3-phase generator). | 1 | Service part / kit | Amazon eBay |
| G0099100 | 3-color LED providing at-a-glance indication of generator ready-to-run status. The display mounts to the front of the generator and plugs into the wire harness. | 1 | Service part / kit | Amazon eBay |
| G0099120 | Includes controller module with Key Switch, Alarm Horn, and Emergency Stop Switch that connects to the Power Zone 410 controller. The module mounts below the controller and is visible through the control panel cover. The G0098511, G0098521, or G0098531 panel and a capable transfer switch are required to be considered for NFPA 110 system control and remote annunciation. | 1 | Service part / kit | Amazon eBay |
| G0099130 | Increases wind speed rating of generator to 186 mph (300 km/h). The kit assembles to the exterior of the generator enclosure and frame. | 1 | Service part / kit | Amazon eBay |
| G0099150 | Aluminum panel and hardware to close off the bottom of the generator. It allows correct airflow is maintained through the generator for cooling while keeping objects out? It is required anytime the generator is elevated. Fits XG03245, XG04045, and XG04845. | 1 | Service part / kit | Amazon eBay |
| G0099180 | It is important to touch-up the paint to protect against corrosion if the generator enclosure is scratched or damaged. The paint kit includes the necessary paint to correctly maintain or touch-up a generator enclosure. | 1 | Service part / kit | Amazon Amazon eBay eBay |
| G0099190 | 3-pole, 70 A CB and mounting hardware (typical for 40 kW, 480/270 V 3-phase generator). | 1 | Service part / kit | Amazon eBay |
| G0099230 | Recommended for operating environments where the temperature drops below 0 °F (-18 °C). The heater is externally powered by 120 VAC, 60 Hz. | 1 | Service part / kit | Amazon eBay |
| G0099250 | Remote Emergency Stop Kit, Surface Mount | 1 | Service part / kit | Amazon eBay |
| G0099260 | Remote Emergency Stop Kit, Flush Mount | 1 | Service part / kit | Amazon eBay |
| G0099270 | Remote Emergency Stop kit, Break Glass | 1 | Service part / kit | Amazon eBay |
Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Standby | 25% | 8.3 | 2.2 |
| Standby | 50% | 12.9 | 3.4 |
| Standby | 75% | 15.8 | 4.2 |
| Standby | 100% | 13.56 | 3.58 |
Available documents
Spec sheet (Generac)Owner's manual — generac-xg04045anac-owners-manual (Generac)Parts manual — 0Parts manual — xg03245-xg04045 hsb specsheet (Generac)Service manual — 956-0302 Onan DFE Operator's and Parts Manual (4-1977) (Generac)Service manual — generac-xg04045anac-installation-sheet (Generac)
This page was generated from the 6 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.