I have a steep hillside to mow. About a 45 degree angle, and its not small. Had a 2 cycle lawnboy that gave up the ghost. What should I get that can handle about 30 minutes of side to side mowing at 45 degrees? Need self propelled. I'm not worried about the safety issues, I have mowed this hill for the last 6 years and I'm in my 50's. I just but my cleats on and have at it! My dad did it until he was 65 years old. The problem is we have always used a 2 cycle. Will this degree of slope destroy a 4 cycle?