[NSRCA-discussion] What is a typical lifespan for OS#F in OS160FX application?

[Kevin Sung]

I have been using the same plug for about 70 flights in a OS160FX running
15% fuel, and each flight last around 8 minutes.  Lately, the engine is
getting a little difficult to start on its first flight, so finally I
replaced it today, and the engine starts right away, which leads me to
wonder what seems to be a typical lifespan for OS#F plug - if this can be
defined at all.

TIA,
Kevin