Generac G0070420 — Spark Plugs
Maintenance · Spark plug(s)
For the Generac G0070420, from the Generac owner's manual.
Applies to: Generac G0070420, Generac GH-426 engine, Generac GTH-530 engine, Generac GT-999 engine
Parts for this job
- 0G0767B Spark plug Amazon eBay $2.17 NAPA $5.63
Part numbers from the service-parts list for Generac G0070420. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- With generator OFF and engine cool, lift lid and remove front panel.
- Clean area around base of spark plug(s).
- Remove spark plug(s) and check condition; install new plug(s) if worn.
- Clean plug(s) by scraping or washing with wire brush and commercial solvent; do not blast.
- Check spark plug gap with a wire feeler gauge; replace if out of specification.
- Reinstall spark plug(s) and torque to 18.4 ft-lbs (25 Nm).
- Press AUTO button to return unit to AUTO mode.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Spark plug gap: 9 kW 0.020 in (0.508 mm); 11 kW 0.030 in (0.76 mm); 16/20/22 kW 0.040 in (1.02 mm)
- Torque 18.4 ft-lbs (25 Nm)
Full service-parts list: Generac G0070420 →
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.