I went to save my neighbor lady from disaster, and found out something interesting. She went to fill the gas on her mower and filled the crankcase instead. She called me to look at it and I said, gotta drain it out. Lifted the mower to pull the plug, and low and behold NO drain plug. It's a new 5.5 hp Craftman push mower.When did they eliminate drain plugs on these? I looked on top then back under NADDA. I finally just tipped it over and let it drain, then refilled it and fired her up. No problem after wards. I guess they don't expect people to change their oil any more.,,