Spark Plug Preference?

[NoBozo]

Originally Posted by Rangervx

most outboards take very specific plugs...as in purpose designed plugs for that exact application. although many or most major manufacturers will cross reference, they could, in extreme circumstances, cause engine damage. you should replace the plug with exactly what came in it from the factory. if you are not sure, you could prob contact the engine manufacturer for some help. your engine serial # may be required.

This advice is totally correct......Unless you are smarter than the manufacturer. There ARE exceptions........ and probably few and far between. BUT... that should be left up to the Experts. NB