old-generac-spark-plug

Wed, 26 Nov 2025 20:14:39 -0600

Additionally, somehow I missed the instruction to change the spark plugs annually or at 200 hours so with the unit being three years old, I was late and it showed. As you can see, the center electrode had burned down to almost a sharp point. It would seem that natural gas burns hotter than gasoline but the thing is, the jenny still started up and ran fine with those plugs.

As it turns out, the plugs are WAY down in the head and after pulling the coil pack I had to use two long 3/8 extensions with a plug socked and I was most worried about dropping something down into that small diameter hole.

Fortunately, no issues and I got all four changed. Filled her with oil and she fired right up. Put the tools and other crap away and called it a day.