Just bought this bolens 2136 with the 12HP I/C engine. The guy that I bought it from had it work on by somebody that doesn't know anything on these machine. He install new blades and tire but didn't adjust it, so the blade are too low even on they high setting + its cutting more on one side. Anyone can help with adjusting the eight of the blade and leveling the cutting deck? I try but its not fine to me. There adjustement at the front of the deck, 2 on the side and also 2 under the seat ?!? where do I start ? whats the eight of the deck at low setting? Should the side wheel contact the grass when cutting? Please help!!!! Also if somebody know if I can install chipping blade?