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Home›Repair guides›Generac›Changing the Engine Oil and/or Oil Filter

Generac PRIMEPACT 66G / PRIMEPACT 66LP — Changing the Engine Oil and/or Oil Filter

Maintenance

For the Generac PRIMEPACT 66G / PRIMEPACT 66LP, from the Generac owner's manual.

Applies to: Generac PRIMEPACT 66G, Generac PRIMEPACT 66LP, Generac GN-480 engine

Before you start

  • Disconnect battery cables before servicing, negative lead first

Parts for this job

Part numbers from the service-parts lists for Generac PRIMEPACT 66G, Generac PRIMEPACT 66LP. Verify against your serial number before ordering; some links are affiliate links.

Procedure

  1. Run the engine until thoroughly warmed up (at least 5 minutes) then shut off.
  2. With engine still warm, remove the oil drain plug and drain oil into a container.
  3. Replace the oil drain plug after draining.
  4. Remove the old oil filter by turning counterclockwise.
  5. Apply a light coating of clean engine oil to the new filter gasket.
  6. Screw on the new filter by hand until gasket contacts adapter, then tighten an additional 3/4 to one turn.
  7. Remove the dipstick and fill crankcase with recommended oil to about 1.4 liters, not above FULL mark.
  8. Install and tighten the dipstick.
  9. Start the engine and check for leaks.
  10. Check oil level and fill to FULL mark after checking for leaks.

Specs & values

Full service-parts list: Generac PRIMEPACT 66G →, Generac PRIMEPACT 66LP →

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.

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