A snowmobile has an engine with a compact arrangement that includes a crankshaft, an output shaft, and an auxiliary shaft. The crankshaft extends along a first axis, the output shaft extends along a second axis, and the auxiliary shaft extends along a third axis. Two of the first axis, the second axis, and the third axis are disposed in a common plane. The other of the first axis, the second axis, and the third axis is offset from the common plane.