An older lady moved in next door. I noticed she had a Honda walk-behind mower with self-propel. She mows her own yard. I noticed that the mower seemed to really be running at low rpms. I didn't want to be a bossy neighbor, so I didn't say anything. After about four or five mowings I thought I knew her well enough to make a suggestion. I told her it sounded to me like she wasn't running the throttle high enough. I told her that air cooled engines should be run at full throttle. She looked at me and said, "but I can't walk fast enough to keep up with the mower if I run the throttle up." I looked and she had her three speed self-propel set on 3 (the highest setting). I'm sure it came this way from the dealer several years previously. I switched it to no. 1 and revved the engine to full throttle. She tried it and said wow that is great. Another recent thing on a walker mower. My fellow worker bought a walker mower. He is spending a lot of time getting familiar with its maintenance and operation, so he will know what to do. He said he couldn't figure out how to check the oil on the deck T-box since the the drain was in the bottom of the front plate. I looked at him and said tilt the deck to the 90 degree position. He looked at me and said DUH! Anyone else had some funny things happen.