I’ve worked at a couple of different repair shops over the years, both having pneumatic lift tables, and protocol for walk-behind mowers, tillers, and other smaller 4-cycle equipment was to tip it over on its side (always dipstick side down, of course). Sometimes you needed to prop the engine or handle with a wood block if the unit needed more stability once tipped. Warming the engine up first always sped up the draining process, but most times, during draining, I cleaned under the deck and sharpened the blade to get three birds with one stone. The only times I made a mess was if I didn’t properly place my drain pan before pulling the dipstick. I have a suction pump, but seldom use it. I’ve changed a lot of oil over the years in these engines, and I’ve found this process to work the best for me. I’ve seen so many customers who have rolled their mower over with carb side down, only to soak air filters and carbs with oil and gas. It’s amazing to find out that practically all of those mower owners were unaware of that, and they’re very appreciative when you let them know.