Generator Spark Plug August 31, 2022, 05:11:42 pm Hi Folks,I finally got around to changing my generator spark plug. I’ve been using these NGK iridium‘s in my small engines and cars and thought I would try it on the generator. I have the Cummins QG4000 on my 2016 MB. What a difference! It went from cranking 20 to 30 seconds to starting almost immediately. I used the BPR5EIX-11 on mine. Ran well too. They are a little more money but just a couple dollars. 5 Likes