Generac GT-760 / GT-990 — Replacing the Spark Plug
Maintenance · engine
For the Generac GT-760 / GT-990, from the Generac owner's manual.
Applies to: Generac GT-990 engine
Procedure
- Stop the engine and pull the spark plug wire off
- Clean the area around the spark plug and remove it
- Set the spark plug's gap to 0.76 mm (0.030 in.)
- Install the correctly gapped spark plug into the cylinder head
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Gap 0.030 in (0.76 mm), Champion RC14YC Amazon eBay $10.00 NAPA $4.94
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.