Generac Q-70G — Checking and Setting the Engine Spark Plug
Maintenance
For the Generac Q-70G, from the Generac owner's manual.
Applies to: Generac GN-480 engine
Before you start
- Sparking can occur if the wire terminal does not fit firmly on the spark plug terminal end.
- Do not blast the spark plug to clean.
Procedure
- Clean the area around the base of the spark plug to keep dirt and debris out of the engine.
- Remove the spark plug and check the condition; replace if worn or if reuse is questionable.
- Check the spark plug gap using a wire feeler gauge.
- Adjust the gap to 0.030 inch (0.76 mm) by carefully bending the ground electrode.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Gap 0.030 inch (0.76 mm)
- Clean and reset gap every 100 hours of operation
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.