ORIGINAL: bchapman
Maybe the 5% nitro fuel would help. All I can get around here is 15 nitro. I've been running the Byron fuel that they sell at Hobby Town. I'm just going to give up on it and buy another engine. I really like flying that Xtra Easy and I don't want to crash it because of that engine. Especially after your said that the cases would break. It's no surprise though. There's probably all kinds of hidden defects in those castings.
Thanks for the advice.
Brian
Poor casting and a very big heavy muffler. I only use 15% and by the time it hit me that the MDS being made in Russia was probably designed for FAI fuel it was too late. I quit using them. When they run they really are a strong engine. I used the .68 for a year or better. It did have Many Dead Sticks but nothing like the .58s. They also take a lot of break in. I had one of the .58s that broke in great then the case broke. The next one they sent me didn't run very well and the case broke right away. The third one just never ran and that's the one I just discovered the bent needle valve. As I recall they came with a head shim to lower the compression but I never tried one.