Generac Air-Cooled Standby Generator Maintenance Kit 5664 — 760/990cc OHVI, 13–17kW service parts

The Generac 5664 Maintenance Kit contains the filters, spark plug, funnel, chamois, instructions and reminder sticker needed to service compatible Generac air-cooled home standby generators.

Keeping a standby generator ready requires routine attention. The 5664 kit is built for Generac air-cooled Guardian models equipped with 760cc or 990cc OHVI engines built between 2008 and 2012. It groups the common service parts into a single package so homeowners and technicians can complete scheduled maintenance at the recommended interval—every 200 hours of run time or every two years, whichever comes first.

What parts are included and what’s missing?

This kit bundles the most frequently replaced items required during a routine tune-up: an air filter, oil filter, spark plug, oil funnel, chamois, an instruction manual, and a reminder sticker. Notably, engine oil is not included and must be bought separately to meet your generator’s oil viscosity and specification requirements.

• Air filter to remove dust and debris
• Engine oil filter for contaminant capture
• Spark plug for reliable ignition
• Oil funnel and chamois for clean oil changes
• Instruction manual and maintenance reminder sticker
• Oil must be sourced separately (not included)

Which generators and engines are compatible with this kit?

The 5664 kit is tailored for Generac air-cooled standby units produced from 2008 through 2012 that use 760cc or 990cc Generac OHVI engines. If your model falls in that production range and lists a 13kW to 17kW output with an OHVI engine, this kit supplies the correct service parts and simplified replacement process.

• Designed for 13kW–17kW air-cooled standby generators
• Fits 760cc and 990cc Generac OHVI engines
• Compatible production years: 2008–2012

How often should I perform maintenance using this kit?

Generac recommends servicing air-cooled standby generators every 200 run-hours or every two years, whichever happens first. In dusty or severe operating environments, inspect and service the unit more frequently to prevent filter clogging and premature wear.

• Standard interval: every 200 hours or every 2 years
• Increase frequency in dusty or harsh environments
• Follow the included instructions for correct replacement steps

How does the kit simplify at-home or technician maintenance?

By consolidating commonly replaced components and providing an oil funnel and chamois for cleaner service, the kit reduces trips to multiple suppliers and speeds up routine work. The instruction manual outlines the sequence of parts replacement so both homeowners comfortable with basic maintenance and professional installers can work efficiently.

• All essential service parts in one box
• Funnel and chamois help keep the service area clean
• Clear instructions and reminder sticker support scheduled upkeep

Who is this for: The Generac 5664 Maintenance Kit is aimed at homeowners and service technicians who own or maintain Generac air-cooled Guardian standby generators from 2008–2012 with 760/990cc OHVI engines, and who want a straightforward, single-purchase way to complete routine 200-hour or biennial maintenance. It’s especially useful for anyone who prefers to keep maintenance parts on hand to reduce downtime after storms or extended outages. Remember to purchase the correct grade and amount of engine oil separately to finish the service.