Re: Denso sparkplugs
For what it's worth, I use American plugs in American outboards, NGKs in Japanese outboards. I suppose Densos are okay for the 4-stroke Evinrudes. But your motor came with Champions and that's what they were engineered with. Unless you're in a country where they are not so readily available. Then use what is available, as long as they're the appropriate plugs according to the available chart.