Lots of engines these days have “spin off” oil filters which makes routine oil and filter changers much easier and cleaner than the older design of filter where the bowl had to be separated and the filter element changed, The problem with a “spin off” filters is that they are normally mounted on the side of the engine and still contain a fair amount of oil, when the filter is removed this oil runs down the side of the engine and into the engine drip tray and even if a receptacle is placed in the engine tray it still leaves quite a mess.
This can be avoided by the use of a short length of 4” plastic house guttering with a blank fitted to one end. The other end is cut to a slight angle, so that when its placed hard against the engine the blanked end slopes down and all the oil that spills from the filter runs down to the blank end. First the filter is slackened using the appropriate tool until it is hand tight. The guttering is then placed under the filter and the filter unscrewed fully with all the oil still in the filter draining into the guttering. Once removed the filter is dropped into the guttering and everything is removed from the boat for disposal at the designated facilities.