My 10-year-old Lawn boy push mower does not have drain plug. Turn on side to drain oil. My son's 3 year old push mower with B&S engine also does not have drain plug. His states to turn on side to change oil or just add oil when needed and never change.What small 4 stroke engines don't have oil drain plugs? The JD rider mower I bought this past summer does, as does the Predator I put in my logsplitter. In fact, the Predator has 2. You'd think if anyone was going to cut a corner it would be HF.![]()