John Deere Propulsion (Non-Certified) Marine Engines PowerTech 4045 Series Marine Engines 4045TFM50 4045DFM70 4045TFM75 PowerTech 6068 Series Marine Engines 6068TFM50 6068SFM50 6068TFM75 6068AFM75 6068SFM75 PowerTech 6090 Series Marine Engines 6090AFM75 6090SFM75