IMO a boat should have a propane
sniffer. The automatic valve, mine is mounted in the bottom vented propane locker, turns off the propane to the line and sounds an alarm
if gas is detected in the cabin
. The detectors are mounted near the sole because propane is heavier than air and collects in the bilges just before the boat goes boom
I don't know enough to recommend a brand, but mine is from Xintex: Marine Propane System Products from Fireboy-Xintex
. If you think they are expensive try dying, it costs a bundle.
What you think is a pilot light, might be the oven burner. The fact that your oven won't light could be as simple as a clogged burner. You might be able to lift
out the bottom pan of the oven and get to it. It could also mean you have a leaking line or fitting resulting in too little pressure.
I usually turn off my propane at the tank when I'm leaving the boat. If I'm leaving for a while, I turn on a burner after turning the gas off at the tank and use up the gas in the line. When I'm getting ready to cook, and turn it back on, it takes a few seconds before the gas line fills and burner lights.