sarlacc:

Your friend must have got a motor off the assembly line the same time one of the guys I fly with did. He just bought an evo 40 to put in his trainer after the saito 56 he had in there broke the second con rod. I must say for being a factory broken in motor (with the carb limiters still on it) it runs terrible....will idle all day but once you go to full throttle for about 25 seconds it will cough and sputter and normally die. Lots of members in the glow engine forum love to bash MDS motors but I will take any one of my 3 MDS motors (2 - 40's and a 61) or even my os46la over that evo 40 if they all run like that.

If MDS stands for Might Dead Stick then the evo should be renamed to an ADS.....Always Dead Sticks. He did call horizon last week and they said to send it back for warranty (only has about a quart of fuel through it with about 20 dead stick landings so far). Horizon said it sounded like a leaky bearing that would lead to the tuning nightmares that he was describing.

If you can't get it to run right I would suggest either calling the LHS or online shop that you bought it from and explain the problems you are having with it and see if they won't replace it with a new one. The evo is tauted as a pre-broken in motor that is ready to fly right out of the box.....all I've seen with this motor so far is dead stick landing practice

Madd_Maxx