Raymarine M81105 Rotary Rudder Reference Transducer Autopilot Sensor Tested

Description

For sale is one  genuine Raymarine Rotary Rudder Reference Transducer (Part Number: M81105). This marine-grade autopilot sensor is a critical mechanism deployed in your vessel\'s steering quadrant or tiller arm network to precisely track and report rudder angles. It provides continuous, exact positional data directly to your autopilot\'s computer brain to maximize tracking accuracy, eliminate helm over-correction, and ensure steady course-keeping without \"hunting\" errors.This pre-owned unit was carefully pulled from the same clean, high-end marine electronics estate lot as our other premium navigation, safety, and sonar gear listed this week.What’s Included in This ListingRaymarine M81105 Rotary Rudder Reference Transducer Casing & Swing ArmIntegrated Dual Ball-Stud Brass Mechanical Linkage Adapter Plate10-Meter Connection Signal Cable(Note: Threaded stainless steel connecting rods, ball-joint sockets, and mounting screws are not Please see all high definition photos for exact details of the condition. You will receive exactly what is shown in the photos).Key System FeaturesHigh-Precision 5k-Ohm Potentiometer: Engineered to track sweeping mechanical rudder movements up to 35° port and starboard, providing instantaneous analog positional response to your helm autopilot computer.Dual-Ball Stud Lever Plate: Features an integrated brass-stud adjustment plate bolted directly to the swing arm, allowing marine technicians to easily calibrate lever ratios based on your rudder\'s physical travel limits.Internal Factory Spring Return: Maintained with clean, continuous internal spring tension to eliminate physical slop or dead zones, ensuring crisp mechanical resistance and highly accurate tracking response.Ignition-Protected Sealed Housing: Sealed to handle the brutal, high-humidity realities of active boat bilge compartments, steering lockers, and exposed transom environments.

Specifications

Brand: Raymarine

Model / Part Number: M81105 (Alternative Legacy ID: Z132)Component Type: Rotary Rudder response Unit / Actuator Sensor Wiring Setup: Standard 3-Wire Interface (Red, Green, Blue terminals)System Compatibility: Fits all legacy and modern Raymarine Smart Pilot, Evolution, ACU-100, ACU-150, ACU-200, and ACU-400 Actuator Control Units.Condition Details Electrical Certification: 100% Bench Tested & Certified Working. Just like the rest of the estate electronics lot we listed this week, this rudder transducer was fully inspected by a licensed marine electrician. The internal resistance sweeps cleanly across the full physical travel arc without any dead spots, voltage drops, or \"scratchy\" resistance reading spikes.Cosmetic Condition: Great Pre-Owned Condition. The heavy-duty composite outer housing and physical swing arm show only light handling wear and minor cosmetic surface scuffs from prior mounting. The structural plastic is entirely free of stress cracks, and the factory signal cable jacket is completely intact and uncut.Shipping & Packaging Dispatched quickly, usually same day or within 24 hours of cleared payment purchase with tracking included.Securely packed inside commercial-grade bubble wrap padding in a secure, sturdy box to protect the sensitive instrument during transit.If you have any questions please feel free to message me.