Thank you for the idea. I think I might as well try. Good thing those parts are plentiful and inexpensive!! I'll let you know what I find.tga wrote: ↑Mon Sep 10, 2018 9:16 pmI worked on one for days with same symptoms. Changed carbs, magnetos, plugs, everything I could think of to no avail. Finally tore it down and found stuck piston rings on one piston. Put in new pistons, rings and jugs and slapped it back together. Has run perfectly ever since.