Generac — Engine Spark Plug Service
Maintenance
From a Generac owner's manual covering: IMPACT 36, IMPACT-34 plus, Impact-36 plus. Check it applies to your exact model before use.
Applies to: Generac Impact-36 plus, Generac GN-220 engine
Before you start
- Sparking can occur if wire terminal does not fit firmly over spark plug terminal end.
Parts for this job
- 72347 Spark plug Amazon eBay $9.99
Part numbers from the service-parts list for Generac Impact-36 plus. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Clean spark plug by scraping or wire brushing and washing with solvent.
- Set plug gap to 0.030 inch (0.76mm).
- Do not blast clean spark plug.
- Ensure wire terminal fits firmly over spark plug terminal end.
Tools required
- Feeler gauge Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Every 100 hours of operation
Full service-parts list: Generac Impact-36 plus →
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.