Service parts for the 20 kW Synergy
Grouped by system, with how many of each the parts manual calls for.
Air intake
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, Liquid Propane Vapor (LPV) |
|---|---|
| Frequency | 60.0 Hz |
| Prime power | 20 kW |
| Controller | G-Flex (AVR) |
| Oil capacity | 1.8 L |
| Voltage options | 240 V |
| Phase | 1 |
| Battery group | Group 26R |
| Battery cranking | 525 CCA |
| Battery voltage | 12 V |
| Battery quantity | 525 |
| Max ambient | -29.0 °C |
Engine
| Oil capacity | 1.8 L |
|---|---|
| Displacement | 0.999 L |
| Aspiration | Naturally aspirated |
| Rated speed | 3600 rpm |
Maintenance & consumables
for the Generac GT-999| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | 0J8478 | 1000 hr | Amazon eBay $20.00 NAPA $24.32 KuduParts $15.00 | ||
| Fuel filter | — | ||||
| Oil filter | Oil Filter | 070185F | Amazon eBay $18.50 NAPA $9.09 | ||
| Battery | 0H3421S | Amazon eBay $283.32 | |||
| Belt | — | ||||
| Coolant | N/A | — | |||
| Coolant filter | — | ||||
| Oil | SAE 30 (above 32°F), 10W-30 (40°F to -10°F), Synthetic 5W-30 (all temperatures) | 3.75 liters | — | 500 hr | |
| Spark plug | RC12YC | 1000 hr | Amazon eBay $12.90 NAPA $11.52 FridayParts $19.99 |
Common questions
What engine does the Generac 20 kW Synergy use?
The Generac 20 kW Synergy is powered by the Generac GT-999 engine.
What fuel type does the Generac 20 kW Synergy take?
The Generac 20 kW Synergy runs on Natural Gas, Liquid Propane Vapor (LPV).
How much oil does the Generac 20 kW Synergy take?
The Generac GT-999 engine in the Generac 20 kW Synergy has an oil capacity of 1.8 liters.
What voltages is the Generac 20 kW Synergy available in?
The Generac 20 kW Synergy is offered in 240 V, 1-phase.
What battery does the Generac 20 kW Synergy use?
The Generac 20 kW Synergy uses 525 batteryies, 12 V each, 525 CCA, group Group 26R, per the manufacturer specification sheet.
What oil filter does the Generac 20 kW Synergy use?
The Generac 20 kW Synergy uses oil filter part number 070185F.
What air filter does the Generac 20 kW Synergy use?
The Generac 20 kW Synergy uses air filter part number 0J8478.
Parts
64| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 070185E | Oil Filter | 1 | Oil filter | Amazon eBay $30.00 NAPA $9.09 FridayParts $45.99 |
| 070185ES | Filtre à huile recommandé | Oil filter | Amazon eBay $30.00 NAPA $9.09 FridayParts $22.99 | |
| 070185F | Oil Filter | 1 | Oil filter | Amazon eBay $18.50 NAPA $9.09 |
| 0C2979 | GASKET, VALVE COVER | 2 | Gasket | Amazon eBay $4.89 |
| 0C5136D | KNOB, AIR CLEANER (20Kw) | Air filter | eBay | |
| 0C8127 | ELEMENT AIR CLEANER | 1 | Air filter | Amazon eBay $15.99 NAPA $24.03 FridayParts $21.87 |
| 0E7585A | Spark Plug | 2 | Spark plug | Amazon eBay $31.65 NAPA $2.63 |
| 0E9371A | Air Filter | 1 | Air filter | Amazon eBay $19.99 |
| 0G0767A | Spark Plug (RC12YC or equivalent) | 2 | Spark plug | Amazon eBay $18.00 |
| 0G5894 | Air filter | 1 | Air filter | Amazon eBay $19.99 NAPA $32.71 KuduParts $13.00 FridayParts $14.80 |
| 0J8478 | Air Filter | 1 | Air filter | Amazon eBay $20.00 NAPA $24.32 KuduParts $15.00 |
| 0J8478S | Filtre à air recommandé | Air filter | Amazon eBay $16.00 NAPA $24.32 KuduParts $15.00 FridayParts $17.20 | |
| 0K3054 | AVR Air filter | 1 | Air filter | Amazon eBay |
| 0K3717 | EcoGen Oil System Drain Pump Kit | 1 | Pump | eBay |
| 241919 | pin extractor | 1 | Belt | Amazon eBay |
| 324776 | Seal, top (kits PA-324742-SD, 324742-SD) | 1 | Seal | Amazon eBay |
| 324777 | Seal bottom (kits PA-324742-SD, 324742-SD) | 1 | Seal | Amazon eBay |
| 324778 | Seal, side (kits PA-324742-SD, 324742-SD) | 2 | Seal | Amazon eBay |
| 327158 | Seal, top (kits PA-327155, 327155) | 1 | Seal | Amazon eBay |
| 327159 | Seal bottom (kits PA-327155, 327155) | 1 | Seal | Amazon eBay |
| 327160 | Seal, side (kits PA-327155, 327155) | 2 | Seal | Amazon eBay |
| 62 590 01 | Oil Cooler, 20RCA/L | Oil cooler | buy | |
| G005819-0 | 26R Wet Cell Battery | 1 | Battery | Amazon eBay |
| RC12YC | Spark Plug | 1 | Spark plug | Amazon eBay $12.90 NAPA $11.52 FridayParts $19.99 |
| REC1220550 | Raw Marine Water Pump | 1 | Pump | Amazon eBay |
| 006560-0 | Generac generator component | Service part / kit | Amazon eBay | |
| 006572-0 | Fuel Lock | Service part / kit | Amazon eBay | |
| 073590A | FUSE 5A X BUSS | 2 | Service part / kit | Amazon eBay $45.99 |
| 077483S | Recommended Battery Volt (1.5L, 2.4L engines) | 1 | Service part / kit | Amazon eBay |
| 0D7178T | Control Panel Fuse | 1 | Service part / kit | Amazon eBay $26.44 |
| 0G66240KEY | Juego de llaves (solo para personal de mantenimiento) | 1 | Service part / kit | Amazon eBay $5.95 |
| 0H3421S | 26R Exide Battery | 1 | Service part / kit | Amazon eBay $283.32 |
| 0K8184 | 1 in ball valve | 1 | Service part / kit | Amazon eBay |
| 0K8624-D | 22/27 kW (2.4 L) | 1 | Service part / kit | Amazon eBay |
| 0K8752 | 1/2 in ball valve | 1 | Service part / kit | Amazon eBay |
| 0K8754 | 3/4 in ball valve | 1 | Service part / kit | Amazon eBay $32.99 |
| 0L2844 | 1-1/4 in ball valve | 1 | Service part / kit | Amazon eBay |
| 0L2845 | 1-1/2 in ball valve | 1 | Service part / kit | Amazon eBay |
| 0L2846 | 2” ball valve | 1 | Service part / kit | Amazon eBay |
| 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 |
| 10000029475 | BADGE ADHESIVE GUARDIAN (22KW) | 1 | Service part / kit | Amazon eBay |
| 10000029516 | BADGE ADHESITIVE GUARDIAN (20KW) | 1 | Service part / kit | Amazon eBay |
| 10000044454 | EWAR SEGSI (ESE1) EN (13, 16-24KW) | 1 | Service part / kit | Amazon eBay |
| 241918 | large | 1 | Service part / kit | Amazon eBay |
| 274697 | Terminal Lug (X-6207-9, X-83-2, X-22-1) | 6 | Service part / kit | Amazon eBay |
| 274778 | Terminal Lug Kit (600 MCM - 02) | 4 | Service part / kit | Amazon eBay |
| 274779 | Terminal Lug Kit (750 MCM - 3/0) | 2 | Service part / kit | Amazon eBay |
| 276842 | Muffler, exhaust | 1 | Service part / kit | Amazon eBay |
| 327166 | Pipe, flex exhaust | 1 | Service part / kit | Amazon eBay |
| G005621-0 | Auxiliary Transfer Switch Contact Kit | 1 | Service part / kit | Amazon Amazon eBay eBay |
| G006485-0 | Scheduled Maintenance Kit | 1 | Service part / kit | Amazon eBay $24.99 |
| G007005-0 | Wi-Fi LP Fuel Level Monitor | 1 | Service part / kit | Amazon Amazon eBay eBay |
| G007038-1 | Aluminio - Bisque | 1 | Service part / kit | Amazon eBay $189.99 |
| G007039-1 | Aluminio - Bisque | 1 | Service part / kit | Amazon eBay $189.99 |
| G007042-10 | Aluminio - Bisque | 1 | Service part / kit | Amazon eBay $189.99 |
| G007043-10 | Aluminio - Bisque | 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 |
| G007103-1 | Breather Warmer | 1 | Service part / kit | Amazon eBay $105.99 |
| G050277 | DECAL OIL DRAIN (10,20-24KW) | 1 | Service part / kit | Amazon eBay |
| GM57968 | Heater, Carburetor | 1 | Service part / kit | Amazon eBay |
| Q115AF | 15A Single Pole AFCI | 1 | Service part / kit | Amazon eBay |
| Q120AF | 20A Single Pole AFCI | 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.
Available documents
Service manual — Generac 18 kW NG, 20kW LP - Synergy Service 0K9138 (Generac)
This page was generated from the 1 manufacturer document above by automated extraction; every figure shown is copied from one of them. How the data is compiled.