At the end of last summer I bought a Redmax trimmer and an edger. Both units are great and the power is awesome. My problem is with my trimmer. After trimming at half trottle for a few minutes when I stab the trottle for more power it bogs and shuts off. Sometimes if I feather the trottle it may not cut off but usually I find myself restarting the unit. My edger has never given this problem. Has anyone else experienced this? If so what does it take to fix the problem? My local dealer has messed with it some but he can not seem to fix it. Also it does not seem to act up until it gets good and warmed up. When it is cold it does not seem to act up as bad. Maybe my dealer is not letting it warm up good when he looks at it.