How often should the spark plug be changed? In my case I have a Nissan 5 HP two stroke. The motor only runs a maximum of 3 hours a year. But there are situations where it must start. What opinions do you have on these split point spark plugs?
I don't know which split plug you're talking about, but two-stroke outboards like to be run, regardless of plug type. Your engine and plug probably suffers more from sitting there than being run. I replace my plugs every year (two-cylinder 8hp Nissan). For $6, I know the engine will fire on the first or second pull, especially when I really need it. Just my two cents (or $6). Peter H23 "Raven"
Mine gets changed every spring, I also have a small waterproof container that I tie to the transom of our dingy that has a spare plug and a small wrench for those "situations where it must start". The container also has a couple of chemical light sticks, vinegar based jellyfish wipes, some bandaids and the boat registration.
cars with very extreme small block engines I found the NGK or ND sparkplugs are by far the best. I have never "shot ducks" with either and have found the I could run up to 2 dozen passes without any failures. Prior to using these plugs we many times failed to get even 1 run and the max was 4 runs. That was with conventional US made plugs. The NGK and ND were Asian. Therefore I have used them in all gas motors I have ever had and in the vehicles my children own. Gap @ .030 to .032 for your OB if it DOESN't have cd ignition and .035 to .037 if it does have CD. Ray
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