Raymarine ST4000MK2 Wheel Drive Only *Not A Complete Pilot

The Raymarine ST4000MK2 Wheel Drive Only – Not a Complete Pilot (E12093) is a replacement or upgrade wheel drive unit designed for use with Raymarine ST4000+ Mk II autopilot systems on wheel‑steered sailboats. This unit attaches directly to your boat’s steering wheel and provides electric drive torque for autopilot control when paired with the appropriate control head and SeaTalk (SeaTalk ng/NMEA 0183) network. It’s not a full autopilot system by itself — you’ll need the autopilot controller, compass, and ACU to complete the system. 

With a robust clutch and simple clamp‑on installation, the ST4000MK2 delivers smooth engagement between manual and autopilot steering. It’s built to fit most spoke wheels and engineered for reliability in marine conditions, making it a solid choice for replacing an old drive unit or upgrading existing autopilot hardware. 

🔧 Technical Specifications

• Model: Raymarine ST4000MK2 Wheel Drive Only

• Part Number: E12093

• Type: Autopilot wheel drive unit (drive only, not a complete autopilot system)

• Compatibility: Works with Raymarine ST4000+ Mk II autopilot systems and SeaTalk‑compatible networks when paired with autopilot controller and compass 

• Steering Type: Wheel‑steered boats (clamps to wheel spokes) 

• Fits Wheel Spokes: 3, 4, 5, 6, 7 or 8 spokes

• Steering Turns Supported: Designed for systems with 1 to 3.5 turns lock‑to‑lock 

• Recommended Displacement: Suitable for sailboats up to ~7,500 kg (16,500 lb) laden displacement 

• Power Requirement: 12 V DC (integrates with existing autopilot power) 

• Integration: SeaTalk/SeaTalk ng/NMEA 0183 data compatible for autopilot network communications 

• Weight: ~7.1 lb (3.2 kg) 

• Warranty: Raymarine global limited warranty (typically 2 years) 

⭐ Key Features

• Replacement/Upgrade Drive Unit: Fits into existing ST4000+ Mk II autopilot systems; not a standalone autopilot.

• Clutch‑Engaged Wheel Drive: Easy transition between autopilot and manual steering. 

• SeaTalk/NMEA Integration: Works over the Raymarine network with compatible autopilot cores and control heads. 

• Wide Wheel Fit: Adapts to 3‑ to 8‑spoke steering wheels common on sailboats. 

• Simple Installation: Clamp‑on design with straightforward mounting and calibration. 

• Marine‑Ready Durability: Weather‑resistant unit designed for long marine service life. 

*Package contains wheel drive only - not a complete autopilot.

Manufacturer : Raymarine
Manufacturer Part No : E12093
UPC : 723193120934