Re: Yanmar 2gm2f no start after fueling
One other nasty I've seen is a perforated pickup tube in the tank.. depending on where it is, you can be fine as long as the fuel in the tank is higher than the pinhole, but once the fuel level drops you're sucking air from there.
Doesn't really match your symptoms, I suppose, but such a problem could be coincidental to your issue. It's another area to check if you have persistent air in the system
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)