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Home›Repair guides›Generac›Checking the Engine Spark Plug

Generac QuietPact 40 — Checking the Engine Spark Plug

Maintenance

For the Generac QuietPact 40, from the Generac owner's manual.

Applies to: Generac QuietPact 40, Generac GN-220 engine

Before you start

  • Do not blast the spark plug to clean.

Parts for this job

Part numbers from the service-parts list for Generac QuietPact 40. Verify against your serial number before ordering; some links are affiliate links.

Procedure

  1. Clean the area around the base of the spark plug; remove plug and check condition.
  2. Replace the spark plug if worn or if reuse is questionable.
  3. Clean spark plug by scraping or washing using a wire brush and commercial solvent.
  4. Check the spark plug gap with a wire feeler gauge.
  5. Adjust the gap to 0.030 inch (0.76 mm) by carefully bending the ground electrode.

Tools required

Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.

Specs & values

  • Spark plug gap 0.030 inch (0.76 mm)

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.

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