Generator maintenance guides
Maintenance reference pages built from the owner's manuals — the exact oil, parts, and intervals the manufacturer specifies.
All pages, A–Z
| Page | In one line | DIY? |
|---|---|---|
| Generac Generator Battery Replacement: Which Battery, and How | Guardian 10–26 kW: 12 V Group 26R wet cell, 540 CCA minimum (Generac 0H3421S), or Group 35 AGM 650 CCA. | DIY-friendly |
| Generac Generator Oil: Type, Capacity and Change Interval by Model | Current Guardians use Generac 5W-20 full synthetic gaseous engine oil (A0001412874), API SJ/SL or better, after a 5W-30 conventional break-in. | DIY-friendly |
| Generac Maintenance Kit: Which Part Number Fits Your Generator | Generac's official kit table matches kits to model numbers, not kilowatts. | DIY-friendly |