Diagnose this spark plug

[oj88]

looks good.
your fuel mix also looks fine.
a good cleaning, gapping, and i think we can re-install it.

medyo dark yung rim.
is it a 'cool' plug? get a hotter plug?

... haven't done plugs in decades...

It's 7 on the heat range... so it is 3 quarters of the way to a cold plug.

If this is a bit cold for gasoline, I think I'll be fine running LP/propane gas with it. LP burns hotter, or so I've read. They even suggested moving one step to a colder plug when switching to LP, so maybe this will do fine.

Anyway, I'll inspect it again in a few months.

Thanks for confirming.