G'day KenMar and Norm,

Chinese made almost like a Torch plug ,possibly one in the pic below.

If I want a good plug I'd use NGK or Bosch

NGK BP6ES, NGBP6ES,

Advantages of Iridium Spark Plugs:

Longer lifespan: They typically last 25,000 to 100,000 miles in vehicles, much longer than traditional plugs.
Better ignitability: They provide a more consistent and reliable spark, improving engine performance.
Improved fuel efficiency: Their efficient combustion can lead to better fuel economy.
Enhanced cold starts: They can improve starting performance in cold weather.

Are Iridium Plugs Needed on a Lawn Mower?

Not necessarily: Most lawn mowers are designed to work well with standard spark plugs, such as copper or nickel-plated plugs.
When to consider iridium: If your mower is high-end, has electronic ignition, or if you want longer intervals between spark plug replacements, iridium plugs could be beneficial.
Cost factor: Iridium plugs are more expensive than standard plugs, so for typical mower use, they might not be cost-effective unless you want the longest possible service life.

Bottom line: For most lawn mower applications, standard or platinum spark plugs are sufficient. Iridium plugs are a good upgrade for vehicles or equipment where longevity and performance are critical, but they are not strictly necessary for typical mower use.

Cheers
Max.

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