Raymarine ST4000MK2/ST4000+ Wheel Drive Only Not A Complete Pilot
The Raymarine ST4000MK2/ST4000+ Wheel Drive provides the wheel-drive component only and is not a complete pilot system. When paired with compatible control and sensing equipment, it assists automated steering, helping operators maintain heading while reducing continuous manual wheel input.
RAYMARINE ST4000MK2/ST4000+ Wheel Drive Only Specifications
| Drive Type | Mechanical Ring Gear Wheel Drive |
| Pump/Ram Capacity | Belt-Driven Rotary Output |
| Flow Rate / Speed | Manual Steering Sensitivity |
| Max Pressure | 65 lbs (30 kg) Torque Transfer |
| Cylinder Compatibility | Sailboats up to 16,500 lbs (7,500 kg) |
| Operating Voltage | 12V DC Input |
| Peak Current Draw | 7 Amps Maximum Load |
| Average Power Draw | 1A - 3A Typical Operation |
| Motor Type | Integrated Low-Profile DC Motor |
| Computer Compatibility | ST4000+, p70s/ACU-100 Control Systems |
| Port Size / Thread | Direct Wheel Hub Mount |
| Drive Connection | Clutch Lever / Drive Belt |
| Rotation/Stroke Direction | Bidirectional Wheel Rotation |
| Mounting Type | Attaches to Cockpit Steering Wheel |
| Housing Material | UV-Stabilized High Impact Polymer |
| Waterproof Rating | IPX6 Splash Protection |
| Operating Temperature | Standard Marine Environment |
| Length (Overall) | Fits Standard Steering Wheels |
| Width/Diameter | Slim Ring-Drive Geometry |
| Weight | 1.5 kg Lightweight Component |
| Included Accessories | Drive Belt, Motor Gear, Lever |
| Key Mechanical Feature | Quick-release clutch for manual take-over |
Common Question of Raymarine ST4000MK2
What is the ST4000 wheel drive?
The Raymarine ST4000MK2 or ST4000+ Wheel Drive is a wheel-drive component for compatible autopilot installations. The listing states it is not a complete pilot. Confirm control head, computer, feedback, power supply, mounting, wheel size, and marine autopilot controller compatibility before installation.
Is it a complete autopilot?
No. The listing explicitly identifies the wheel drive only, not a complete pilot. Confirm the required control head, course computer, heading sensor, feedback, wiring, battery, and mounting hardware before purchase. The drive alone cannot provide a complete hydraulic autopilot system.
Does it operate a windlass?
No. The ST4000 wheel drive turns a compatible steering wheel and does not operate a gypsy, drum, chain, or anchor rope. It is not an anchor windlass component. Use dedicated anchoring equipment for retrieval.
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