Every single motor I've worked on in the last 10 years -- from chainsaws, to weedwhackers, leafblowers, cars/trucks, motorcycles, outboards & tractors --has suffered from a lean condition. Every single one. When I bought my Echo 2-stroke weedwhacker, it was apparent from the first 10 pulls of the recoil starter that this thing was not set up optimally. Same with the Husqvarna chain saw I bought ... and the Echo leaf blower -- all were ridiculously lean. Just finished a snowblower today that required a turn or 2 out of the main.
When I used to work in the city, I would come across at least 10 pieces of lawn equipment PER WEEK, that residents just threw in the trash. Most were less than 3 years old. Every single one (except one with a flywheel bolt that was improperly torqued & sheared the keyway) ran great & started with one pull once I worked my magic with the carb.
My '74 RD350 came from the factory with #25 pilots, & 120 mains at sea level. It now has a 37.5 pilot & 210 mains along with a much richer emulsion tube. Before I changed the emulsion tube (needle jet) & needle from stock, I needed to run a 280 main .... which was STILL too lean!
You'd think someone would have brought forward an investigation on ethanol content around MA & other places that require it's use. The silence is deafening .... and with our liberal state government, par for the course.