Bronze retractable through-hull depth sounder with 13.8m cable

The Raymarine M78717 transducer is a depth sensor designed specifically to measure the depth beneath your vessel. It provides reliable data to your compatible Raymarine multifunction display or onboard instrument, essential for navigation and safety.

The M78717 transducer housing is made of bronze. This material is selected for its durability and resistance to corrosion, particularly in saline marine environments.

Bronze offers excellent corrosion resistance in marine environments, especially in saltwater. It is particularly durable and robust, ensuring a long lifespan for the depth sounder. Compared to plastic, bronze is generally more resistant to impacts and abrasion.

The Raymarine M78717 transducer is supplied with a 13.8-metre cable. This length provides sufficient flexibility for routing and connection to the onboard instrumentation.

The "retractable" function means the transducer can be removed from its through-hull housing without taking the boat out of the water. This greatly simplifies maintenance, cleaning the sensor surface, or storing the transducer when the boat is not in use, without requiring haul-out.

No, the Raymarine M78717 transducer is specifically designed for depth measurement only. The product context does not mention any temperature measurement capability.

Thru-hull installation offers several advantages:

Increased accuracy: The transducer is mounted directly through the hull, minimizing exposure to turbulence and providing more stable and precise readings.Less damage: Less prone to damage compared to transom-mount transducers, especially during docking or towing.Optimal performance: Ideal for high-speed boats or those navigating rough conditions, as it maintains constant contact with the water.

The M78717 through-hull bronze transducer is suitable for fiberglass and wooden hulls. Bronze is an appropriate material for these hull types in a marine environment.

Yes, as its name suggests ("through-hull transducer"), installing the M78717 requires drilling a hole in your boat's hull. This hole allows the transducer body to pass through the hull for optimal depth measurement.

Installing a through-hull transducer typically requires basic tools for drilling and sealing, such as a drill, drill bits matching the transducer’s diameter, marine sealants (caulk), and wrenches to tighten the mounting nut. It is recommended to consult the installation manual for a precise list of required tools.

Yes, this is one of the main advantages of the "retractable" function of this transducer. You can remove the transducer from its housing from inside the boat to clean or inspect it without having to haul the boat out of the water.

To ensure accurate depth readings, it is crucial to position the transducer in an area where the water flow is as laminar and undisturbed as possible. Avoid zones near propellers, keels, water intakes, or any elements that could create air bubbles or turbulence under the hull. The installation manual provided with the transducer will give detailed guidelines for optimal positioning.

The precise diameter of the hole to drill for installing the M78717 transducer is a critical technical specification. These dimensions are always provided in the installation manual supplied by Raymarine with the product. It is essential to refer to this document to ensure a correct and watertight installation.

This transducer is designed to provide reliable depth data to your Raymarine multifunction display or compatible onboard instrument. To check exact compatibility with a specific model (e.g., Axiom, Element, i70s, etc.), refer to your Raymarine device specifications or Raymarine compatibility charts.

The Raymarine M78717 transducer is specifically designed to integrate with Raymarine navigation systems. While some universal compatibility may exist for standard NMEA 2000 transducers, this model is optimized for Raymarine equipment and likely uses a proprietary connector. Compatibility with other brands is generally not guaranteed and not recommended.

The Raymarine M78717 transducer is designed to connect to compatible Raymarine instruments. It typically uses a proprietary Raymarine-specific connector, engineered to ensure a reliable and watertight connection with their multifunction displays or sounder modules.

Yes, due to its bronze body, the M78717 transducer is particularly well suited to the marine environment and saltwater thanks to its corrosion resistance. It will also operate without issues in freshwater.

The product context does not specify whether a fairing block is included with the M78717 transducer. Generally, through-hull transducers may require a fairing block to optimize performance on certain hull shapes, but this depends on the model and installation. It is advisable to check the exact contents of the packaging or Raymarine’s documentation.

Thanks to its retractable function, you can remove the transducer from the housing from inside the boat. For cleaning, use a soft brush and fresh water to remove marine dirt, algae, or fouling. Avoid abrasive products or metal tools that could damage the sensor surface. Regular cleaning ensures optimal performance.