that really stinks man.. i have a evo .46 that has been through more than i ever could have expected.. it came with my hobbico superstar when i first was learning to fly and i crashed that plane a total of 13 times with repairs and then stuck it on a spad that i never could get balanced out properly so i finally drove it in to pavement and then once on my new h9 cessna it went straight in when my stupid L bend didnt hold on the elevator servo, it popped loose and the plane went straight in at high speeds.. each time i took a blow gun hooked to a compressor and just blew it off and the carb out and repaired the plane and slapped it back on there and dogged the crap out of it with 15% nitro.. so i have had an amazing experience with evolution so sorry for your bad experience, has this been the only evo engine you have owned? if so i might give evo another go or maybe contact them and see what they would charge to check it out, quite possibly they will find something defective and fix or replace it! i urge you to send it in man, give it a shot!