I have 2 Echo's with no spark. A 650 EVL that was one of my Dad's saws, and the 750 EVL my friend just gave me. I saw a couple electronic modules, used, on the bay for $125. Not going to drop that kind of money on a used part. Is there any trick to putting a Nova II module in them. I put one in a points Homelite Super 1050 with no problems and it runs fine after about 10 years.