These are selected manufacturer-published intervals, not a complete service procedure. Match the model, serial number and manual revision first. Time or operating-hour limits mean the earlier interval. Work requiring electrical, fuel, hot-engine or automatic-start isolation belongs with qualified personnel following the manual.
Open the printable maintenance log →
Generac 10–28 kW, manual A0004332577
Apply only after matching the manual to the serial number; do not apply to all legacy Generac models.
| Task | Published interval / evidence gap |
|---|---|
| Oil and oil filter | First 25 hours; then 2 years / 200 hours, whichever occurs first. Manual, printed pages 26–27 |
| Severe-temperature oil service | Below 40°F, or continuous use above 85°F: annually / 100 hours. Manual, printed pages 26–27 |
| Air filter and spark plugs | 4 years / 400 hours. Manual, printed pages 26–27 |
| Battery condition | 2 years / 200 hours. Manual, printed pages 26–27 |
| Oil level, leaks and enclosure louvers | Daily during continuous operation or before use. Manual, printed pages 26–27 |
| Fuel leak test and water intrusion | Annually. Manual, printed pages 26–27 |
| Valve service / exercise / monitoring | No interval transcribed here; use applicable instructions. Manual, printed pages 26–27 |
KOHLER 14RCA(L), TP-7092 4/26
RDC2 family manual; match exact unit and revision. More frequent service may be needed in harsh conditions.
| Task | Published interval / evidence gap |
|---|---|
| Engine oil | Yearly / 100 hours. Manual, printed pages 67–68 |
| Oil filter | Yearly / 200 hours. Manual, printed pages 67–68 |
| Oil level during extended operation | Every 24 operating hours. Manual, printed pages 67–68 |
| Exercise | Weekly. Manual, printed pages 67–68 |
| Battery charger operation | Monthly. Manual, printed pages 67–68 |
| Enclosure interior | Inspect / clean quarterly. Manual, printed pages 67–68 |
| Valve service / cold-weather parts | No interval or accessory selection transcribed; verify exact instructions. Manual, printed pages 67–68 |
KOHLER 20/26RCA(L), TP-7092 4/26
Standard oil interval differs from the 26RCA(L) premium-oil schedule. Earlier interval applies where time and hours are listed.
| Task | Published interval / evidence gap |
|---|---|
| Standard oil, 20/26RCA(L) | Yearly / 150 hours. Manual, printed pages 67, 69 |
| Premium oil, 26RCA(L) only | 2 years / 300 hours; verify specified oil requirements. Manual, printed pages 67, 69 |
| Oil filter | With every oil change. Manual, printed pages 67, 69 |
| Oil level | Every 24 operating hours. Manual, printed pages 67, 69 |
| Exercise / battery charger | Weekly exercise; monthly charger check. Manual, printed pages 67, 69 |
| Enclosure interior | Inspect / clean quarterly. Manual, printed pages 67, 69 |
Coverage gaps remain visible
Champion, Briggs & Stratton and Cummins service matrices are not published here yet. We have not transcribed and verified their applicable maintenance schedules. Air-filter, spark-plug, valve, battery-replacement and accessory details not shown above remain manual-specific; absence from this table is not permission to skip them.
During a long outage
Record running hours, service due points, alarms and technician contact details before the next outage. Follow the exact manual’s stopping, cooling, checking and restarting procedure. Arrange service before a due interval rather than assuming a weekly exercise schedule covers continuous operation. Monitoring alerts support attention; they do not replace inspection.