Abstract: A fluid cylinder such as a hydraulic cylinder used on marine engines to control the steering direction and/or trim position of a propeller shaft comprises internally ported fluid lines located in line with the longitudinal axis of the cylinder and may be either ported in the base of such a cylinder or, alternatively, in the head.

Abstract: A hydraulic cylinder assembly including an outer barrel having one or more internal sleeves and a center rod telescopically mounted therein. The outer barrel and internal sleeves each have a bottom end tube welded to one end thereof and a packing gland tube welded to the other end thereof. The center rod has a bottom end tube welded to one end thereof. The bottom end tubes on said barrel and sleeves have end caps removably mounted therein. Stop shoulders are formed integrally with the end tubes of the internal sleeves and center rod. Mating stop shoulders are formed integrally with the packing gland tubes of the outer barrel and internal sleeves. Said stop shoulders are adapted to move into engagement with each other when the hydraulic cylinder assembly is energized.