I added a detail photo essay into the photo gallery on how easy it is to change oil. You should buy a small hand pump and keep this onboard so you can pump out and change oil when out on anchor or moored out or at a remote dock. I have been changing my own oil for many years and I use to use a large pump and extractor, but that requires storage space when cruising, so this little hand pump works well.
See the full photo album and process here...
ipyoa.com/photos/62-hayden/album?albumid=221
Learn to Change oil...
The hand pump in position