Generac IQ3500 — Spark Plugs
Maintenance · Ignition system
For the Generac IQ3500, from the Generac owner's manual.
Applies to: Generac IQ3500, Generac GH-410 engine, Generac GT-530 engine, Generac GT-530 engine, Generac GT-990 engine, Generac GT-999 engine
Parts for this job
- 0J00620106 Spark plug Amazon eBay $35.00 NAPA $2.82 FridayParts $32.07
Part numbers from the service-parts list for Generac IQ3500. 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 the spark plug(s) and check condition; install new plug(s) if worn or reusable is questionable.
- Clean the 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.
- Adjust the gap by carefully bending the ground electrode: 0.76 mm (0.030 in) for 8, 11, 20kW; 1.02 mm (0.040 in) for 13-17kW.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 8, 11, 20kW gap: 0.76 mm (0.030 inch)
- 13, 14, 15, 16, 17kW gap: 1.02 mm (0.040 inch)
Full service-parts list: Generac IQ3500 →
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.