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

Generac QuietPact 40 LP — Checking the Engine Spark Plug

Maintenance

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

Applies to: Generac QuietPact 40 LP, 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 LP. Verify against your serial number before ordering; some links are affiliate links.

Procedure

  1. Clean the area around the base of the spark plug to keep dirt and debris out of the engine. Remove and check condition.
  2. Clean spark plug by scraping or washing using a wire brush and commercial solvent. Do not blast the spark plug to clean.
  3. Check the spark plug gap using a wire feeler gauge. Adjust to 0.030 inch (0.76 mm) by bending the ground electrode.
  4. Replace the spark plug if worn or if reuse is questionable.

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 LP →

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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