The first two hours of the morning were spent changing four very large diesel filters. It is a problem that I have had in the past so I carry three sets of spares. However, it is not a fun job. All of the floor had to come up and, with the aid of a filter wrench, I had to get into some difficult places and get off the mucky old ones. This involves putting a plastic jug under them, or a plastic bag, so that any diesel that escapes does not end up in the bottom of the boat. Once they were replaced I had to bleed the air out of the system and hope that the engines will then start. Fortunately, they started after a few anxious moments and I let them run for a few minutes.
The starboard filter showed signs of the dreaded diesel bug. I spent the afternoon, without success, trying to locate some biocide fluid to treat the tanks. I finally located some on Monday. It now remains to be seen if the engines will now run reliably at sea.