Had the same trouble with my Evolution .46 and as a student I was having a heck of a time with continous deadsticks. Almost hated to fly, I would think I had it fixed and it would come right back. Replaced all the fuel lines..thought I had a pin hole..Deadstick...Finally I descided to take the motor off and break it down. Their on the bench I realized that the nipples for the fuel line from needle to carb were loose and that their gasket was coming out..Replaced gaskets and tightened the nipples...Problem solved. I learned a valuable lesson... After every few flights I will inspect each and every screw, nut, bolt, coupling, etc...