One of my best friends has a Stihl 038 Farm Boss AVS with about 10 hours on it. He's one of those guys who has 6 saws & needs only 2. I'm a guy with one & needing a back up. I ran a tank of gasoline through it today. Runs very smooth & everything works fine. Can someone tell me the CC & HP of this saw? I searched a couple threads but seems they couldn't decide between 61 or 67 CC. Another place says 61CC & 4HP. Help