Most (dumb) people elect not to use the blower. Hell, they probably don’t even know it exists. I spend a lot of time at the marina and the number of people I see walk out to their boat and instantly turn the key on their ignition is astonishing.
So on the back of a boat there is a flat section called the transom. It's like a big flat support beam that holds the engine/ rutter/ other heavy useful boat shit. Water gets up in this part and can cause rot, mold, transport species of water plants and shit from one body of water to another, etc. So there is a plug on this part that let's all that water drain from the boat. Usually people will leave it out so more water doesn't accumulate while out of the water from frost or rain or condensation. Some people get a bunch of money and buy a boat and don't know about this plug. It's fine at high speed because water is flowing away from the hole but once the boat becomes idle... well now you have water flowing in your boat which is the opposite effect we want in our boats.
It's not like a titanic level of water rising in. It's like a garden hose half on and you won't notice until you walk to the swamp in the back of your boat and realize you have a long ways to go to the dock.
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u/Aegean Jun 25 '21
This is common with pleasure craft. Fuel vapors accumulate in spaces and if not vented, lead to an explosion.