The Yanmar ran for about 5 minutes then abruptly stopped. I have never been a fan of where a PO place the fuel fill - on the floor of the cockpit. A curious decision to say the least.
After finding lots of water and algae in the fuel, I diagnosed a failed rubber ring on the fuel cap. As much as I like my Yanmar, it is not a hydrogen fuel cell and algae is the wrong kind of "bio" for the diesel.
The sail home will have to wait. So I put the main sail on and called it a day.