Bought the wrong motorhome!!!

First of all, not all diesel pushers are created equal. Some of the shorter models manufactured in the 90's or early 2000's came with the Cummins 5.9 L engines. These engines came in all sorts of HP levels ranging from 190hp tp 275hp. The issues with these engines is not reliability, but rather lack of adequate TORQUE! Don't be fooled by hp numbers as torque MOVES the coach. The 8.1 L (+) engines provide much higher torque levels and most of the time, better fuel milage, as they are better matched for the weight to torque ratio. I have found the the 5.9 L engines are typically underpowered for the weight of a 34' (+) motorhome as they do not have the torque required.