I have an Echo HC151 hedge trimmer and it is not cutting well since brand new. I asked here before and was suggested to looking into the time of the blades. I take that means the synchronization of the two half. I finally have time to open the bottom plate and look at what's going on. I found out that I can take the top gear that control one blade out and change to any position. The original position is Both blade move at opposition at all time. When one move to one extreme end, the other blade reach the opposit extreme end also. The motion is in such that at one extreme position, the teeth of both blade complete over lapping. When it start moving, it will keep going to one teeth off and completely over lap before it start to reverse direction. I lift the gear out and change the timing a little, then I start seeing portion of the cycle, both blade move in same direction which I take that is no good. I conclude that the original timing of the blade was perfect and I put it back as it was. Am I doing it right? I am running out of ideas why my trimmer don't cut. The blade feels sharp, it is only 5 hours old!!!!