Aye the dirty drums were usually kept in a converted toilet in the engine room for taking old oil ashore to be disposed of, the fresh drums were given to a local fisher of whelks to make whelk pots from , but as you said these engines were good, this one produced 320 hp which was plenty enough for us even when scallop dredging in strong tides we would keep on trucking, what you seen in the fore of the engine was oil and belt dust mixed, not the easiest of things to keep clean especially when new v belts wear down to fit in the pullies better over the first couple of days , then need re tightened, the hydros were a dream to work on, basically taking off the top of the PTO and changing a cartridge, but would lift as much as winch was capable, this one was 10 tone core pull rated so by the time you got to outer wires, it was only something like 2.4 tonne, which meant hauling a side of gear at a time if full of stones, but thats life lol, its one boat I had returned to twice, and apart from a hole in one of the liners which we decided to do a complete overhaul just to keep the inside in good order, but when working 20 hours a day on deck, looks take fourth place between working eating grabbing a nap when you can and then cleaning , and after ten days the skipper would not allow us back to boat for four days so we got proper rest and let bodies relax, it was different when trawling for nephrops as we had time in between hauls to get rags out and things as tows lasted four hours but scalloping, it was anything between 20 minutes and an hour and a half