Hi!
But all engines on the market are both reliable, hold up well and perform well , so what is the problem? I could understand the question if we spoke pylonracing engines here like MB, IR or Cyclon .40 engines...but when it comes to ordinary sport glow or gas engines like OS , Saito, ASP , Rossi ,TT, Y&S both two and fourstroke you name it...then they all are reliable, hold up equally well and perform well!

Someone who is not able to handle those engines without problems should not blame the engines!