 A flywheel was fitted to the output shaft.Thin cylindrical copper water jackets surrounded the cylinders almost to their base, where a rubber ring, located by a circumferential groove in the cylinder, provided a sliding water seal that allowed for the differential thermal contraction of copper and steel.Cooling water was fed to these jackets by an engine-driven pump via a horizontal tube on the low right side of the engine, assuming a tractor orientation, and fed to the radiator by another tube on the top left.