Raymarine Type 2 Linear Drive – 12V (M81131)

The Raymarine Type 2 Linear Drive – 12V (M81131) is a high-performance mechanical autopilot drive unit designed for boats with mechanically steered rudder systems. It delivers powerful thrust, quiet operation, and fast response times, making it ideal for mid-size vessels that require reliable autopilot steering performance. This unit is engineered to work with a compatible Raymarine autopilot corepack (such as the ACU-400) and connects to the rudder stock via a tiller arm or quadrant. When the autopilot is disengaged, the electromagnetic clutch releases to allow smooth, unobstructed manual steering. 

🔧 Technical Specifications

Performance

• Designed For: Mechanically steered vessels up to 15,000 kg (33,000 lb) displacement 

• Peak Thrust: 480 kg (1,050 lb) 

• Maximum Stroke: 300 mm (12″) 

• Hard-over to Hard-over Time: Approximately 11 seconds (+/- 35° no load)

• Maximum Rudder Torque: 1,190 Nm (10,500 lb·in) 

Electrical

• Operating Voltage: 12 V DC

• Typical Power Consumption: 48 – 72 W 

Construction

• Drive Mechanism: Electric motor with high-tensile belt driving epicyclic gearbox 

• Electromagnetic Fail-Safe Clutch: Releases for manual steering when autopilot disengaged

• Quiet Operation and Low Backdrive Force: Minimizes resistance on steering when in standby

System Compatibility

• Recommended Corepack: Raymarine ACU-400 (sold separately) 

• Steering Interface: Rudder stock/tiller arm mounting (accessory fittings may be required) 

Certifications & Use

• Marine-Grade Construction: Designed for use in typical below-deck applications 

• Installation: Recommended installation by an authorized Raymarine dealer or certified technician 

⭐ Key Features

• Mechanical linear autopilot drive for mechanically steered boats 

• Strong 480 kg thrust with fast 300 mm stroke for effective rudder control 

• Quiet operation with low backdrive when autopilot is idle 

• Electromagnetic fail-safe clutch allows seamless switch to manual steering 

• Works with Raymarine autopilot systems and ACU-400 corepack (sold separately) 

Key Features:

• Genuine Raymarine Type 2 Linear Drive

• Voltage: 12V DC

• Designed for Type 2 autopilot systems

• Provides smooth, precise linear motion for steering

• Rugged marine-grade construction for durability

• Ideal for recreational and professional boating applications

• Part Number: M81131

The Raymarine Type 2 Linear Drive 12V ensures reliable, precise steering control, making it an essential component for advanced autopilot performance.

Manufacturer : Raymarine
Manufacturer Part No : M81131
UPC : 023193811314