And another hint,
When changing the primary fuel filter located a short distance aft of the starboard side access door, cut the top off an empty plastic 2 litre milk container, leaving the handle in place but cutting down towards the top of the widest part. The bottom bit of the container with the handle will fit under and around the fuel filter so that its contents when separated from the top don't end up sloshing around in the bilge.
Also having changed the primary filter first, there was enough fuel left in the secondary filter to enable the engine to run long enough at low rpm for the system to automatically recharge the filters with fuel and without needing to fiddle about with the priming pump. Then the secondary filter was changed, and again there was enough fuel in the injector pump and lines to do the same again.