Hello all. Another day, another problem...used the boat for the first time in a while yesterday and seemed ok while running at higher revs but down towards idle there's a misfire. I've changed fuel filters etc, and even flushed out the injector rails and so on (no dirt or water found), but still the misfire. It's odd because it's like it's cycling, every two or three seconds at idle there's a blip then it's fine for two or three seconds then a blip...and so on. Any ideas?