nbell,

Thanks for the expert advice. I am used to mixing gas and oil for all of the small 2-stroke engines I run to maintain our property. I was always a little skeptical of automatic mixing systems, when I could easily get the mixture exactly right by hand (with not much effort).

When you say 80% of your repairs are fuel/oil, does that mean varnish in carbs because people didn't swap out their old gas, or major repairs due to lack of engine lubrication as the automatic oiler quit putting oil into the gasoline supply?