Larry W4CSC wrote:

I'm confused about the remarks of the STUPID bilge pump switch.
snip
Or did the stupidity
of the bilge pump actually having an OFF position submerge this gas sensor,
causing it to short out??

Correct. The bilge pump switch made by Rule has 3 positions:
ON/OFF/AUTO. The bilge pump switch panel does in fact have a fuse, but
the propane sniffer doesn't, err, didn't.

- Ari