I have a 2 cycle Toro mower that takes a 32:1 ratio. I have Echo backpack blower, trimmer and edger that are 50:1. I have always run 32:1 in all of them. Can I expect any major problems with the Echo gear other than cleaning plugs and exhaust ports more often? I seem to remember someone saying it was fine but I was filling the jugs today and just thought I would ask to be sure. They seem to start and run fine. Well the trimmer is a bit old and cranky but a new SRM-230 is coming soon I think.