WE all have talked about methods for extracting the oil but none have mentioned changing the oil filter.
BTW, I've use the electric pump referenced by Mike (knotflying) for my R-25. It was well worth the expense IMO as hand pumping is a PITA.
Now onto oil filter change/replacement.
Here's what I do to avoid oil dripping down onto the engine and into the bilge. I have a smallish plastic bag that I wrap around the filter and hold onto it as I unscrew and release the filter. When released the filter falls nicely into the plastic bag along with any residual oil that finds its way out. Thus I now have the old filter which is full of oil and any drips etc well contained in the plastic bag. I can then pull this out and secure it in a bucket or whatever I have at hand for dumping the old filter into. Now the new filter can be installed, tightened and using a rag to wipe any oil residue I can see. I've never had any oil escape onto the engine or into the bilge using this technique. I give credit for this to Captain of Nellie Too.... Bob (Robert) & Nita Ostlund who instructed me on the best way to change the oil filter. It does work like a charm. 🙂 THANK YOU Bob.