Because over the years I’ve had several brand new Champions fail right out of the box. I go thru lots of plugs and purchase NGK’s by the ten pack and have never had a bad one yet. Older outboards seem to run a bit better with them to.
Champion has changed their country of manufacture several times and I think they left the old quality control behind somewhere along the way. I’ve seen a video of the NGK factory in Japan and their quality control is number one! Each individual plug is inspected manually and random plugs are continuously being tested for proper gap and performance. An NGK plug with -10 at the end of its number means it has been pre gapped to one millimeter, or 0.039″. Checking them with a feeler gauge verifies this. Any Champion I’ve ever purchased has had to have its gap set.
This is sorta like the Ford vs Chevy thing. Each one gets the job done and everyone has one they prefer more than the other so if it’s Champions which float your boat, so be it. Myself, it’s NGK’s all the way!
And no, I don’t have any affiliation with the company in any way!
