These helms combine one or two bi-directional axial piston pumps with pilot check and make-up check valving. The result is a unit that prevents rudder feedback, is very efficient (even at low rpm) and is immediately adaptable to multi-station use. Hynautic number H21 has a 1" straight shaft, and the H25 has a 3/4" tapered shaft.

The West Advisor

The West Advisor articles have answered boaters' questions and provided solutions to boating problems for more than 20 years. West Marine has compiled one of the Web's most comprehensive collections of technical boating information articles.