Raymarine Type 2 Long Linear Drive – 12V (M81132)

The Raymarine Type 2 Long Linear Drive – 12V is a high-performance mechanical autopilot drive unit engineered for boats with mechanically steered rudder systems up to approximately 20,000 kg (44,000 lb) displacement. This long-stroke linear drive provides strong thrust and extended travel for reliable course-keeping and smooth rudder response, making it ideal for larger vessels that demand precise autopilot control.

Designed to work with Raymarine autopilot systems (typically paired with the ACU-400 control unit), the M81132 uses a powerful electric motor with an electromagnetic fail-safe clutch, a high-tensile belt drive, and a precision epicyclic gearbox for efficient, quiet operation. When the autopilot is disengaged, the clutch releases to allow unhindered manual steering. 

🔧 Technical Specifications

Performance

• Rated Voltage: 12 V DC

• Maximum Boat Displacement: ~20,000 kg (44,000 lb) – suitable for large mechanically steered vessels 

• Peak Thrust: ~480 kg (1,050 lb) – strong steering force 

• Maximum Stroke: ~400 mm (16 in) – extended travel for larger rudder movement 

• Hard-Over to Hard-Over Time: ~14 sec at ±35° (no load) 

• Maximum Rudder Torque: ~1,660 Nm (14,700 lb·in) – high resistance capability

Electrical

• Operating Voltage: 12 V DC

• Typical Power Consumption: ~48–72 W (12 V) – efficient motor draw 

Drive & Construction

• Drive Type: Mechanical linear actuator with high-tensile belt and epicyclic gearbox 

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

• Quiet Operation: Low back-drive force when not engaged 

• Installation: Attached below decks; connects to rudder stock/tiller arm with accessory fittings (may be required) 

Compatibility

• Autopilot Interface: Typically used with Raymarine autopilot control units such as ACU-400 (sold separately) 

• Steering Systems: For boats with mechanical linkage steering (rudder stock or tiller arm) 

⭐ Key Features 

• Long-stroke linear drive for large mechanically steered boats up to ~44,000 lb displacement 

• 480 kg (1,050 lb) peak thrust and 400 mm (16 in) stroke for extensive rudder control

• Smooth, quiet steering with low back-drive resistance

• Electromagnetic fail-safe clutch for seamless transition to manual steering 

• Efficient power draw (48–72 W) on 12 V systems 

• Ideal upgrade for autopilot installations needing greater servo travel and torque 

Key Features:

• Genuine Raymarine Type 2 Long Linear Drive

• Voltage: 12V DC

• Extended stroke for larger vessels or custom steering setups

• Provides smooth, precise linear motion for Type 2 autopilot systems

• Rugged marine-grade construction for durability

• Ideal for recreational and professional boating

• Part Number: M81132

The Raymarine Type 2 Long Linear Drive 12V delivers dependable autopilot performance, making it essential for accurate, responsive steering on boats with extended steering requirements.

Manufacturer : Raymarine
Manufacturer Part No : M81132
UPC : 023193811321