Generac QuietPact 40 — Changing the Engine Oil and/or Oil Filter
Maintenance
For the Generac QuietPact 40, from the Generac owner's manual.
Applies to: Generac QuietPact 40, Generac GN-220 engine
Before you start
- Never operate the engine with oil level below the Add mark.
Parts for this job
- 070185 Oil filter Amazon eBay $30.00 NAPA $3.59 FridayParts $45.99
Part numbers from the service-parts list for Generac QuietPact 40. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Run engine until thoroughly warmed up (at least five minutes), then shut OFF.
- Pull oil drain cover free; remove plug with 5/16 inch allen wrench and drain oil.
- Replace plug on end of oil drain tube and retain cover in base.
- Remove old oil filter by turning counterclockwise; place towel underneath.
- Apply light coating of clean engine oil to gasket of new filter and fill filter with clean oil.
- Screw new filter on by hand until gasket lightly contacts adapter; tighten additional 3/4 to one turn.
- Remove dipstick and wipe dry with clean lint-free cloth.
- Remove oil fill cap, slowly add recommended oil, and fill to dipstick FULL mark. Do not overfill.
- Install and tighten oil fill cap and dipstick.
- Start engine and check for leaks.
Tools required
- 5/16 inch allen wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Change oil/filter after first 25 hours, then every 100 operating hours
- Oil capacity with filter 0.8 L (0.84 qt)
Full service-parts list: Generac QuietPact 40 →
Source: Generac owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.