M81134 Type 2 Long Linear Drive Unit (24V)

The Raymarine Type 2 Long Linear Drive (24V) is a heavy-duty solution that delivers outstanding power and accuracy for autopilot steering on larger vessels. This below-deck drive unit connects directly to the boat’s steering system, physically pushing the rudder via an independent tiller arm or quadrant. Rated for boats up to 20 tons of displacement, it effortlessly takes command of the helm, providing smooth rudder movements and steadfast course holding even in rough seas. The drive’s powerful motor can exert a peak thrust of about 480 kg to move the rudder, ensuring the autopilot can respond immediately to changing conditions. An integrated electro-mechanical clutch automatically disengages the drive when the autopilot is put in standby, enabling the helm to be turned freely by hand without any drag – a critical safety and convenience feature. Thanks to its advanced engineering, the linear actuator operates with minimal noise and vibration, contributing to a more comfortable onboard experience during long passages.

Key benefits and use cases:

• Ideal for large yachts and workboats: The M81134 drive is tailored for sailing or power vessels with mechanical steering – for example, 40–50 ft cruisers or trawlers that demand a robust autopilot. It keeps your boat on track through heavy seas and strong winds, reducing helm fatigue on the skipper. This drive is particularly valuable for bluewater sailors and commercial operators who require unwavering autopilot performance on extended voyages.
• Seamless integration with Raymarine systems: Designed to pair with Raymarine’s Evolution autopilot range, the unit interfaces with the high-current ACU-400 control unit to deliver precise and adaptive steering control. Installation involves linking the drive to the rudder stock via a tiller arm or quadrant (additional steering tiller hardware may be required depending on your vessel’s setup). Once installed and calibrated, the drive becomes an integral part of the autopilot, responding instantly to course corrections computed by the EV sensor and course computer.
• Rugged marine-grade construction: Built to withstand the demands of continuous offshore use, the M81134 features durable components that resist corrosion and wear. Its mechanical and electrical elements are engineered for the marine environment, ensuring reliability over many seasons of cruising. Whether it’s enduring high rudder forces or operating in a hot engine room, this drive unit is up to the task, delivering trust in your autopilot system when you need it most.
• Quiet and efficient operation: Even under heavy loads, the drive unit operates smoothly and quietly, avoiding disturbance to crew and guests. The efficient design yields quick hard-over times (approximately 10–12 seconds no-load) so that the autopilot can make rapid heading adjustments – crucial when navigating winding channels or avoiding obstacles. The quiet operation also means that the autopilot can work in the background without drawing attention, allowing you to enjoy the voyage.
• Easy maintenance and support: The M81134 is designed for long-term service with minimal upkeep. Once properly installed, it requires little maintenance beyond routine inspection of the drive ram and electrical connections. The unit is part of Raymarine’s well-supported product line, meaning documentation, spare parts, and expert service are readily available if needed. In essence, you can depend on this drive unit to perform consistently, backed by Raymarine’s reputation in marine autopilots.

By equipping your autopilot with the M81134 linear drive, you’re investing in top-tier steering performance. This drive unit gives your autopilot the brawn needed to handle your vessel in all conditions, from calm cruising to heavy weather. It enhances both safety and convenience – holding a precise course so you can attend to navigation or simply relax, confident that the autopilot will respond with authority and keep you on the intended heading. For anyone seeking to upgrade their boat’s autopilot for serious voyaging, the M81134 Type 2 Long Linear Drive is a premier choice that delivers reliability and peace of mind on the water.