Every year I replace the small Yanmar diesel filter on my 2YM15, but have never changed what I presume is the primary diesel filter/ water separator in the bilge. I have drained a little diesel from the flanged nut underneath. This looks like a CAV 296 filter top but without an obvious glass water separator. Is there a specific type of filter/replacement for this and is this something that is routinely changed?

Yes, definitely. The 296 is probably doing almost all the work of filtering. The cartridges are cheap and are worth changing fairly often although there's lots of scope for argument about how often!

Martin
P335/50

Hi Martin,
Thanks for replying. Presumably these come with or without a water separator, as I can't see any glass bowel at the bottom. Do I just undo the wing nut at the bottom and ease out the cylinder - if there is room!!
Bob

Sorry "bowl" - comes from a medical education!
Bob