I just fitted the blade disc and no kick back. it started but ran rough and then would not start. I still have a spark on the spark plug. I have been looking at the carbs master and will be rebuilding the carburettor properly. I have never worked on power torque engines or g4/LM carburettors before. learning as I go. the videos are helpful however the coil has nothing to do with it as it only goes in one way and you set the depth. the blade disc can go in any way and the orientation does not matter as Norm had told me and as I tried it out today. This only leaves me to rebuild the carburettor.