The smaller YS's usually worked well. I still have 120FZ and the 63DZ. Well mannered little mills. I had a 140L that was an absolute bear and after factory repairs it was sold.

The new 185 really really sounds interesting. Just may have to get one of them.

Gasoline 2 stroke engines that work well in Pattern are finally emerging over the past couple years. Light and powerful mills. One needs to experience the simplicity and easy field manners, and surprising torque in mid range to appreciate these latest developments. Some people world-wide are experimenting with them, notably the French and a several of us here in the states. These are more reliable than any glow powerplant I've yet seen. They just work and work, for years with practically no maintenance..... not one season and then overhaul.....As always your milage may vary.