M81202 Type 3/12V Hydraulic Linear Drive Unit (Raymarine Autopilot)

The Raymarine Type 3 Hydraulic Linear Drive (12V) is engineered to take the helm of large yachts and powerboats on your behalf. Designed for mechanically steered vessels up to 35 tons displacement, this drive unit delivers powerful and precise autopilot steering even in demanding conditions. It is a self-contained hydraulic steering system – including a hydraulic ram, pump, fluid reservoir, and fittings – pre-filled and bled for easy installation. The hydraulic ram mounts securely to the boat’s structure and attaches to the rudder via an independent tiller arm (additional tiller hardware from your steering system manufacturer may be required).

Key benefits and use cases:

• Exceptional power and thrust: the hydraulic drive provides up to 675 kgf peak thrust to move your rudder effortlessly, ideal for heavy displacement vessels and bluewater cruising
• Fast and quiet operation: achieves approximately 10 seconds hard-over to hard-over rudder travel (±35° no-load), ensuring quick response while operating with minimal noise – perfect for long passages and overnight runs
• Reliability on long voyages: the closed hydraulic loop and built-in clutch ensure dependable steering control and seamless transition to manual helm with no drag when needed
• Usage recommendations: an excellent choice for large sailing yachts (approx 50+ ft) and heavy motorboats requiring precise autopilot control. Must be paired with the Raymarine ACU-400 control unit for full compatibility and performance. Professional installation is recommended for proper setup and calibration of the system.