Originally Posted by bigeye
Use the 3/4" plug on the starboard side of the engine at the top of the crank case and below the carburator. That's what it is for. Use a simple hand pump with plastic hoses. Yes it can be a bit messy but not if your careful. Can't imagine waiting to take out three-four quarts of oil through the dipstick!
Early engines had a built in pump that stayed screwed into this access point.
Buy the Moyer Marine repair manual. It shows how to do many maintenance procedures.
Hey everyone, don't let this one slip by, this is the correct answer (sorta, it's on the port side in my boat, under the fuel pump).
Combine that with this from Moyer:
Moyer Marine Online Store
and a simple hand pump like this
Amazon.com: Jabsco 34060-0130 Marine Engine Oil Drain Hand Pump (10.25" Long, 1.25" Diameter): Sports & Outdoors
Liquivac Topside Oil Changer | Oil Extractors | Northern Tool + Equipment
or even this:
PUMP CRANK CASE OIL HAND OPERATED 102947
and you are done and cleaned up from your oil change in 10 minutes.