Damn, now THIS is a wild coicidence. I was just over a Pfaff's yesterday dynoing my lawn mower and was sorely disappointed that it was only making 1.3hp instead of the advertised 1.5hp. I ended up spending $22k to get a new carb, bump the compression, get a custom ground cam from RMBuilder, CMI exhast, new crank and piston. Maybe I can recover. Anyhow, I'm going to have to run it on 110 octane now. Looking to get something over 3.7hp out of it. I'll show my cocky-ass neigbor and his fancy Cub Cadet!