Generac 8.1 GN — Spark Plugs
Maintenance
For the Generac 8.1 GN, from the Generac owner's manual.
Applies to: Generac 8.1 GN, Generac GH-410 engine, Generac GT-530 engine, Generac GT-990 engine, Generac GT-999 engine
Before you start
- Do not blast the plug(s) to clean.
Parts for this job
- RC14YC Spark plug Amazon eBay $10.00 NAPA $4.94
Part numbers from the service-parts list for Generac 8.1 GN. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- With the generator shut down, lift the lid and remove the front panel.
- Clean the area around the base of the spark plug(s).
- Remove spark plug(s) and check condition; install new if worn or reuse is questionable.
- Clean plug(s) by scraping or washing with a wire brush and commercial solvent. Do not blast.
- Check the spark plug gap using a wire feeler gauge and adjust by 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
- 8, 11, 20 and 22 kW units: 0.76 mm (0.030 in)
- 16 kW units: 1.02 mm (0.040 in)
Full service-parts list: Generac 8.1 GN →
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.