Generac 3500iO / GP3500iO — Service Spark Plug
Maintenance · ignition
For the Generac 3500iO / GP3500iO, from the Generac owner's manual.
Applies to: Generac 3500iO, Generac GP3500iO
Before you start
- Replace spark plug if electrodes are pitted, burned or porcelain is cracked
Parts for this job
- 0J00620106 Spark plug — Generac 3500iO Amazon eBay $35.00 NAPA $2.82 FridayParts $32.07
- 0J00620106 Spark plug — Generac GP3500iO Amazon eBay $35.00 NAPA $2.82 FridayParts $32.07
Part numbers from the service-parts lists for Generac 3500iO, Generac GP3500iO. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Remove spark plug cover
- Clean area around spark plug
- Remove and inspect spark plug
- Inspect electrode gap with wire feeler gauge, reset gap to 0.6-0.7 mm (0.024-0.028 in)
- Install spark plug finger tight, tighten additional 3/8 to 1/2 turn with spark plug wrench
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Gap 0.6-0.7 mm (0.024-0.028 in)
Full service-parts list: Generac 3500iO →, Generac GP3500iO →
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.