Raymarine ST4000MK2/ST4000+ Wheel Drive Only Not A Complete Pilot

Description

The Raymarine ST4000MK2/ST4000+ Wheel Drive is a replacement mechanical wheel-drive unit, not a complete autopilot system. It attaches to a compatible cockpit steering wheel and uses a motor-driven belt and ring-gear mechanism to turn the wheel. A quick-release clutch lever disengages the drive for manual steering takeover.

The wheel drive is specified for compatible sailboats up to 16,500 lb, or 7,500 kg, displacement. It operates from a 12V DC supply, draws 1A to 3A typically, and can reach 7A under maximum load. The 1.5 kg drive uses a UV-stabilized high-impact polymer housing with IPX6 splash protection and includes the drive belt, motor gear, and clutch lever.

Key Specifications

• Mechanical ring-gear wheel drive designed as a replacement drive unit, not a complete pilot.
• Fits a compatible cockpit steering wheel through a direct wheel-hub mount and belt-drive arrangement.
• Designed for sailboats up to 16,500 lb, or 7,500 kg, displacement.
• Operates on 12V DC with 1A to 3A typical draw and 7A maximum load.
• Uses an integrated low-profile DC motor for bidirectional wheel rotation.
• The quick-release clutch allows manual steering takeover by disengaging the powered drive.
• Weighs 1.5 kg and uses UV-stabilized high-impact polymer housing with IPX6 splash protection.
• Includes drive belt, motor gear, and clutch lever only; separate autopilot electronics remain required.

System Integration

This wheel drive needs a compatible ST4000MK2 or ST4000+ autopilot system, including the appropriate control head, course computer, heading sensor, wiring, and power supply. It is not a substitute for a compatible complete pilot, and it should not be used to drive a higher-current Type 1 linear actuator.

Verify wheel size, hub fitment, pedestal clearance, spoke clearance, drive-belt path, manual clutch access, steering friction, vessel displacement, and the exact existing Raymarine system model before ordering a replacement drive.

Before Ordering

Confirm that you require the wheel-drive component only, that your existing system is compatible, and that the vessel is within the 16,500 lb guideline. Verify steering-wheel and hub fitment, manual clutch clearance, 12V supply, 7A circuit capacity, drive-belt configuration, splash-protected mounting exposure, and the presence of all required autopilot electronics before purchase.