The S1000 was initially designed to match SeaStar hydraulic steering systems (the largest install base of hydraulic outboard steering systems across the world). However, the design of the product is such, that it may also be suitable for other manufacturers systems - such as Vetus, Uflex and Lecomble & Schmitt.
The S1000 design parameter is to match hydraulic pumps with a rating of 140cc - 160 cc (8.4 in3), with a typical hard-over-to-hard-over time of 12 seconds. This table lists hydraulic steering systems in this range that are of suitable size to be used with the S1000 autopilot system. Please click the link at the bottom of the table to see the full details.
Manufacturer |
Hyd Cylinder or Ram |
Hyd Cylinder size |
Vetus |
OBC 175 |
128cm3 7.8in3 |
Uflex |
UC128-OBF |
108cm3 6.6in3 |
LS |
VHM300 Pro RI |
136cm3 8.3in3 |
LS |
VHM 232 H |
139cm3 8.4in3 |
LS |
VHM EX 321 |
126cm3 7.7in2 |
LS |
VHM EX 281 |
100cm3 6.1in2 |
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Click here for full table details...
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To connect one of the specified drives within the table will require the replacement of three hydraulic adaptors that connect to the rear of the helm pump with suitable connectors to fit your system. This chart will help you identify the locations of the fittings that must be changed. You may click the chart for an enlarged view.

Click to enlarge.
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