I have been doing the 1/4" air fitting method since I bought my Mojo. I use an manual pump oil extractor that holds 9.5qts. I run the boat to temp, open the fill port and pull the dipstick to allow air in the engine, and pump the extractor. Works like a charm.

I have a spin on Filter verses the new cartridge style. For this I use aluminum foil liners from treager grill catch can. It fits over the Filter with room to spare and bend to get in position. Spin the Filter off, catch it in the foil liner, catch any oil, wipe the surface clean and no oil in the bilge. The filter being gone gives easy access to the exchanger drain plug also.