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Home›Repair guides›Generac›Replacing the Spark Plug

Generac — Replacing the Spark Plug

Maintenance

From a Generac owner's manual covering: GT-760, GT-990, GTH-760, GTH-990, GTV-760, GTV-990. Check it applies to your exact model before use.

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Procedure

  1. Stop the engine and pull the spark plug wire off of the spark plug.
  2. Clean around the spark plug and remove it from the cylinder head.
  3. Set the spark plug gap to 1.0 mm (0.040 in.).
  4. Install a correctly gapped spark plug into the cylinder head.

Tools required

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

Specs & values

  • Spark plug gap 1.0 mm (0.040 in.)

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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