Generac 6485 Maintenance Kit for 20–22 kW Home Standby Generators (2013+), air & oil filters, spark plugs

Generac 6485 maintenance kit supplies the genuine air filter, oil filter, spark plugs and basic tools needed to service 20–22 kW home standby generators with the 999 cc OHV engine (models made 2013 and later).

Routine servicing keeps standby generators reliable when power is needed. This compact kit bundles the wear parts and handy accessories recommended for periodic maintenance of Generac 20–22 kW Home Standby (HSB) units. The components are selected to match the 999 cc Generac OHV engine and to simplify upkeep at the manufacturer’s suggested intervals—typically every 200 operating hours or every two years, with more frequent attention in dusty or harsh environments.

What exactly comes in the Generac 6485 kit?

The kit contains the common consumables and a few useful extras to complete a straightforward service session. Each item is chosen to fit Generac 20–22 kW HSB models produced from 2013 onward.

• Replacement air filter matched to the 999 cc OHV engine for proper airflow and protection.
• Engine oil filter sized to factory specifications (oil not included).
• Spark plugs correct for the engine to restore ignition consistency.
• Small service accessories: an oil funnel, a chamois cloth, and a maintenance reminder sticker.

How often should I service my 20–22 kW Generac with this kit?

Generac recommends servicing these standby units roughly every 200 hours of operation or at least every two years. In dusty or otherwise harsh settings you should inspect and replace filters and plugs more often to maintain performance.

• Standard interval: every 200 run-hours or every two years.
• Increase frequency if the unit operates in dusty, salty, or heavily soiled conditions.
• Use the included sticker to record the next service date on the generator.

Which engine oils work best with this kit (oil not included)?

The kit does not include engine oil, so choose the oil grade that suits your local climate and the generator’s operating range. Generac’s guidance varies by temperature to protect the 999 cc OHV engine across seasonal extremes.

• Synthetic 5W-30—recommended for cold starts down to −20°F up to about 110°F.
• 10W-30—appropriate when temperatures usually fall between −10°F and 40°F.
• SAE 30—suitable where temperatures remain between 32°F and 110°F.

Will this kit work on my older or different Generac model?

This kit is designed specifically for 20–22 kW Home Standby units equipped with the 999 cc Generac OHV engine and built in 2013 or later. Cross-check parts numbers in your owner’s manual or consult Generac support for other models or older units.

• Compatible: 20–22 kW HSB models with 999 cc OHV engine, 2013+ production years.
• Not guaranteed for older or different-capacity Generac engines—verify against your manual.
• Refer to model/serial information on the unit for exact fit confirmation.

Who is this kit for? Homeowners and facility managers who own a Generac 20–22 kW standby generator with the 999 cc OHV engine and want an easy way to perform scheduled maintenance will find this kit convenient. It’s useful for property caretakers who prefer to keep commonly replaced parts on hand between professional services, and for anyone wanting the correct, factory-matched filters and plugs to preserve generator readiness. For complex repairs or warranty service, follow Generac’s authorized service recommendations and consult the owner’s manual.