yep happened on my boat. Diesel bug.I can truthfully say yes, left diesel in my Discovery for 12 years, and even though she started on the second turn with a new battery it made a holy mess of the Sedimenter/fuel filter/ lift pump/injection pump, left them all with a brown tar like substance that was the devil’s to remove,
My boat is 45years old and needs work, it's the only way I can afford it..
I boat, any boat, is an ever expanding hole in which you try to fill by throwing in money or the equivalent of standing in a shower ripping up £20 notes.
They are good fun but by no means classed as cheap!