Don't have manual but used the M 1.35 for 2 seasons. It's a great engine - almost as powerful as the OS 160. Can pull large props. Mine was happy with the narrow blade APC 18X8. However, it has the same problem that many large 2-stroke have if using the BCM pitts muffler: not enough pressure to tank from muffler nipple which results in lean runs. Solution is either a pump or blocking off one exhaust outlet.