Abstract: A mobile log sawing and splitting machine including trailer frame having a vehicle engaging hitch at its forward end and ground engaging wheels at its rear end, with a saw mandrel mounted to extend crosswise of the beam adjacent its rear end and a log splitting mechanism mounted lengthwise of the beam for splitting cut-off sections of the logs. An internal combustion engine is mounted to enable quick disengagement of the engine from the drives for the log saw and log splitting mechanisms to facilitate starting and/or selectively disconnection of the drive to one or the other of the mechanisms. An upper saw guard is mounted for turning about the axis of the saw mandrel in response to movement of the log support mechanism during a cutting operation, and a lower stationary saw guard is arranged to receive the upper saw guard. The lengthwise extending trailer beam also functions as a hydraulic reservoir for the hydraulic power system.