Steve Foley wrote:
What would 100LL do to a lawn mower?

If the answer is foul the plug, I'd rather clean a plug than screw around
with gunked up fuel lines.

I use it in my lawn tractor now and again. It actually makes
the thing run better. With the drought lately I haven't had
to run it as much and the mogas putrifies so quickly that
I've taken to using the Avgas... suprised by how much nicer
it runs, of course I may have to clean the plug eventually.