Service parts for the Guardian 20 kW
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredOil system
1 requiredElectrical
1 requiredIgnition
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | natural gas or propane |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 20 kW |
| Standby kVA | 20 |
| Prime power | 18 kW |
| Controller | Evolution |
| Oil capacity | 1.8 L |
| Voltage options | 240 V |
| Phase | 1 |
| Rated current | 83.3 A |
| Power factor | 1.0 |
| Circuit breaker | 90 A |
| Battery group | 26R or 35AGM |
| Battery cranking | 540 CCA |
| Battery voltage | 12 V |
| Battery quantity | 1 |
| Dimensions (L×W×H) | 1219×635×737 mm |
| Dry weight | 203 kg |
| Sound level | 67.0 dBA @ 7 m |
Engine
| Oil capacity | 1.8 L |
|---|---|
| Displacement | 0.999 L |
| Aspiration | naturally aspirated |
| Rated speed | 3600 rpm |
Maintenance & consumables
for the Generac G-Force 1000 Series| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | 0J8478 | 1000 hr | Amazon $28.99 eBay $20.00 KuduParts $15.00 | ||
| Fuel filter | — | 200 hr | |||
| Oil filter | 070185E | 500 hr | Amazon $35.19 eBay $30.00 FridayParts $45.99 | ||
| Battery | 12 volts, Group 26R-540CCA minimum or Group 35AGM-650CCA minimum | 0H3421S | Amazon eBay $283.32 | ||
| Belt | — | 200 hr | |||
| Coolant | — | ||||
| Oil | 3.75 | — | 500 hr | ||
| Spark plug | Gap 0.040 in. (1.02 mm); torque to 18.4 ft-lbs (25 Nm) | RC12YC | 1000 hr | Amazon $19.99 eBay $12.90 FridayParts $19.99 |
Service intervals
2| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Scheduled maintenance | Change | 200 hr | 24 mo | Oil, oil filter, spark plugs recommended for maintenance kits |
| engine oil | Change | 200 hr | 24 mo |
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 | Manufacturer recommendations | Oil must be purchased separately based on manufacturer recommendations |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
1Cold Weather Operation installation
- Install cold weather kit if temperature regularly falls below 32°F
- Kit includes thermostat-controlled battery pad
- Kit includes engine-block warmer
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 power rating of the Generac Guardian 20 kW?
The Generac Guardian 20 kW is rated 20 kW standby (20.0 kVA).
Which engine powers the Generac Guardian 20 kW?
The Generac Guardian 20 kW is powered by the Generac G-Force 1000 Series engine.
What fuel type does the Generac Guardian 20 kW take?
The Generac Guardian 20 kW runs on natural gas or propane.
How much oil does the Generac Guardian 20 kW take?
The Generac G-Force 1000 Series engine in the Generac Guardian 20 kW has an oil capacity of 1.8 liters.
What oil filter fits the Generac Guardian 20 kW?
The Generac Guardian 20 kW uses oil filter part number 070185E.
Which air filter part number does the Generac Guardian 20 kW take?
The Generac Guardian 20 kW uses air filter part number 0J8478.
Parts
65| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 070185E | Oil Filter | 1 | Oil filter | Amazon $35.19 eBay $30.00 FridayParts $45.99 |
| 070185ES | Recommended oil filter (engine specifications table) | Oil filter | Amazon $16.99 eBay $30.00 FridayParts $22.99 | |
| 070185F | Oil filter | 1 | Oil filter | Amazon $31.99 eBay $18.50 |
| 0C2979 | GASKET, VALVE COVER | 2 | Gasket | Amazon eBay $4.89 |
| 0G0767A | Spark Plug (RC12YC or equivalent) | 2 | Spark plug | Amazon $17.29 eBay $18.00 |
| 0J8318 | Rotor Brushes | Brush | eBay | |
| 0J8478 | Air Filter | 1 | Air filter | Amazon $28.99 eBay $20.00 KuduParts $15.00 |
| 0J8478S | Recommended air filter (engine specifications table) | Air filter | Amazon $17.99 eBay $16.00 KuduParts $15.00 | |
| 0K3054 | AVR Air filter | 1 | Air filter | Amazon eBay |
| 0K3717 | EcoGen Oil System Drain Pump Kit | 1 | Pump | eBay |
| A0006487350 | AGM Group BTX20L Battery | Battery | Amazon eBay | |
| G005819-0 | 26R Wet Cell Battery | 1 | Battery | Amazon eBay |
| G006199-0 | PMM Starter Kit | Starter | Amazon eBay | |
| RC12YC | Spark Plug | 1 | Spark plug | Amazon $19.99 eBay $12.90 FridayParts $19.99 |
| 073590A | FUSE 5A X BUSS | 2 | Service part / kit | Amazon eBay $45.99 |
| 098290 | ASM MOTOR STEPPER | 1 | Service part / kit | Amazon eBay $65.00 |
| 098941A | Governor connector housing | 1 | Service part / kit | Amazon eBay |
| 098958A | CONNECTOR INTERFACE ASSEMBLY | 1 | Service part / kit | Amazon eBay $47.99 |
| 0A7568 | Door weldment 1.5EPS | 2 | Service part / kit | eBay $540.52 |
| 0D7178T | Control panel fuse | 1 | Service part / kit | Amazon $6.99 eBay $26.44 |
| 0D8656 | Mounting base 1.5L standard & acoustic | 1 | Service part / kit | Amazon eBay |
| 0D8657 | Radiator support 1.5L Mitsubishi | 1 | Service part / kit | eBay $339.95 |
| 0D8660 | Side brace 1.5L Mitsubishi | 2 | Service part / kit | eBay |
| 0D8664 | Duct acoustic & standard compartment 1.5L | 1 | Service part / kit | eBay |
| 0D8666 | Roof acoustic & standard compartment 1.5L | 1 | Service part / kit | eBay |
| 0E0072A | Acoustic insulation 1.5L roof panel | 1 | Service part / kit | buy |
| 0E0072B | Acoustic insulation 1.5L duct LH panel | 1 | Service part / kit | buy |
| 0E0072C | Acoustic insulation 1.5L duct FNT panel | 1 | Service part / kit | buy |
| 0G66240KEY | Service keys (pair) | 1 | Service part / kit | Amazon $6.99 eBay $5.95 |
| 0H34215 | 26R Exide Battery | 1 | Service part / kit | eBay |
| 0H3421S | 26R Exide Battery | 1 | Service part / kit | Amazon eBay $283.32 |
| 0L4836A | FUEL LINE FLEX 3/4 NO PVC (13,16-24KW) | 1 | Service part / kit | Amazon eBay $34.95 |
| 10000013645 | DECAL AUX SHUTDOWN (13,16-24KW) | 2 | Service part / kit | Amazon eBay |
| 10000029476 | BADGE ADHESITIVE GUARDIAN (24KW) | 1 | Service part / kit | Amazon eBay $5.99 |
| 10000044454 | EWAR SEGSI (ESE1) EN (13, 16-24KW) | 1 | Service part / kit | Amazon eBay |
| 929-0100 | 1 | Service part / kit | Amazon eBay | |
| G005621-0 | Auxiliary Transfer Switch Contact Kit | 1 | Service part / kit | Amazon Amazon eBay eBay |
| G005703-0 | Paint Kit | 1 | Service part / kit | Amazon Amazon eBay eBay |
| G005704-0 | Paint Kit | 1 | Service part / kit | Amazon eBay |
| G006186-0 | Power Management Module (50 Amps) | Service part / kit | Amazon eBay | |
| G006463-4 | Mobile Link | 1 | Service part / kit | Amazon eBay $99.99 |
| G006485-0 | Scheduled Maintenance Kit | 1 | Service part / kit | Amazon eBay $24.99 |
| G006829-0 | Scheduled Maintenance Kit | Service part / kit | Amazon eBay | |
| G007000-0 | Smart Management Module (50 amp) | 1 | Service part / kit | Amazon Amazon eBay $65.00 |
| G007000-1 | Generac Load Manager (50 amp) | Service part / kit | Amazon Amazon eBay $69.99 eBay $125.00 | |
| G007005-0 | Wi-Fi LP Fuel Level Monitor | 1 | Service part / kit | Amazon Amazon eBay |
| G007006-0 | Smart Management Module (100 amp) | 1 | Service part / kit | Amazon Amazon eBay $109.99 |
| G007006-1 | Generac Load Manager (100 amp) | Service part / kit | Amazon Amazon eBay $300.00 eBay | |
| G007009-0 | LTE LP Tank Fuel Level Monitor | 1 | Service part / kit | Amazon Amazon eBay $157.99 eBay $157.99 |
| G007027-0 | Fascia Base Wrap Kit | 1 | Service part / kit | Amazon eBay |
| G007101-0 | Battery Pad Warmer | 1 | Service part / kit | Amazon eBay $95.00 |
| G007102-0 | Oil Warmer | 1 | Service part / kit | Amazon eBay $119.95 |
| G007102-1 | Oil Heater | Service part / kit | Amazon eBay $79.99 | |
| G007103-1 | Breather Warmer | 1 | Service part / kit | Amazon eBay $105.99 |
| G007103-2 | Breather Heater | Service part / kit | Amazon eBay | |
| G007169-0 | Accessoire cellulaire Mobile Link ® 4G LTE | 1 | Service part / kit | Amazon Amazon eBay eBay |
| G007170-0 | Mobile Link® Cellular Accessories - Wi-Fi/Ethernet | 1 | Service part / kit | Amazon eBay |
| G007211-0 | Battery Heater | Service part / kit | Amazon eBay | |
| G007216-0 | Scheduled Maintenance Kit | Service part / kit | Amazon Amazon eBay $56.48 eBay $56.48 | |
| G007220-0 | Base Plug Kit - Bisque | 1 | Service part / kit | Amazon eBay |
| G007301-0 | High Altitude Kit | Service part / kit | Amazon eBay | |
| G007303-0 | High Altitude Kit (20 kW) | 1 | Service part / kit | Amazon eBay |
| G007305-0 | High Altitude Kit | Service part / kit | Amazon eBay | |
| G009918-0 | Touch-Up Paint Kit | Service part / kit | Amazon Amazon eBay eBay | |
| G050277 | DECAL OIL DRAIN (10,20-24KW) | 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 | 50% | 8.99 | 2.37 |
| Standby | 100% | 13.48 | 3.56 |
Available documents
Spec sheet (Generac)Spec sheet — generac A0000937818 (Generac)Reference (Generac)Parts manual — E1151Rev0 Sec8a (Generac)Parts manual — E1151Rev0 Sec8c (Generac)