Engine output takeout device includes: a first crank gear mounted on a first crankshaft; a second crank gear mounted on a second crankshaft; a ring gear surrounding the first and second crank gears and having inner teeth meshing with the first crank gear; and an idler gear rotatably mounted coaxially on the first crankshaft via bearings and meshing at its one position with the second crank gear and at its other position with the inner teeth of the ring gear, the first crank gear and the idler gear both meshing with a same inner tooth of the ring gear at any given time.