Plugs and engines
Steve,
If you are considering JetCat all I can say is it's one fantastic piece of machinery; easier to operate than a glow engine and absolutely reliable, I've had no problems with it whatsoever.
Andy,
Regarding plugs it doesn't matter much what you use in a JetCat as long as it is not a four-stroke plug. More important than the brand is that it is properly modified. You need to pull out two separated coils a distance of about 1/8." Light the plug with an ignitor battery a few times before you do it to anneal the element and keep it from breaking when you pull it out. The OS A3 works fine as does the Rossi. I am currently using an Enya 3 and it works beautifully, my JetCat starts right up without delay. The Enya has a nice big ball on the end like the Rossi which gives the plug wire something to hook on to.