Ok
I have twin 1998 150 Yamaha's, 1998 Merc Mariner 15 HP and & 1991 9.9 HP Johnson.
My saddest story is when i blew up a 1992 150 HP Johnson in Barnegat Bay (because eel grass clogged up the engine).
A close second was when my current twin Yamaha's went for a a salt water bath.
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The uptick here is that my friendly mechanic had them both running a 1/2 hour after I pulled the boat and dropped them off.