Carb cleaner does naff all unless you use it to clean dismantled carbs
Yes gap them but you're unlikely to find it makes a massive difference as long as they're roughly right.
It's only the NGK plugs AFAIK with -10 at the end of the number that are properly factory gapped.
Redex will shift varnish/gum etc if it's very minor.
Need spares,consoles,consumables,hire,training or even a new boat?
Please click HERE
and support our Trade Members.
Join up as a Trade member
or Supporter HERE