Raymarine P66 Transom Mount Depth Transducer, For ST40 Instruments, 200 kHz

Overview

The Raymarine E26027-PZ is a P66 transom-mount depth transducer for Raymarine ST40 instruments. It is a depth-only transducer with a single 200 kHz frequency, making it a practical replacement or installation part when the boat needs basic depth data without speed, temperature, or CHIRP functions.

The P66 housing mounts on the transom and uses a rounded hydrodynamic shape to reduce turbulence around the sensor face. A 30 ft cable gives enough reach for many small and mid-size powerboat installations, especially where the depth display is mounted at the helm and the sensor is positioned on the stern.

Key features

• Compatible with Raymarine ST40 instrument installations that use this P66 depth transducer connection.
• Depth-only output keeps the setup focused on bottom readings without added speed or temperature sensors.
• Single 200 kHz operation suits shallow-to-moderate depth monitoring for everyday navigation, docking approaches, and coastal running.
• Transom-mount P66 housing works well for outboard and I/O powerboats where an external stern-mounted sensor is the preferred fit.
• 30 ft cable supports typical runs from the stern to the helm or instrument panel.
• Kick-up transom bracket helps reduce damage risk if the transducer is struck by floating debris or an accidental impact.
• Sensor can be removed from the bracket without tools for service, storage, or cleaning.
• ISO spade connectors allow connection to compatible depth instruments without a network backbone.

Installation and setup

This transducer is mounted on the boat’s transom, so placement matters. It should sit where it can stay in clean water flow while the boat is underway, away from heavy prop wash, strakes, steps, or fittings that can send bubbles across the sensor face. Correct height and angle at the transom help the instrument maintain a steady bottom reading as speed changes.

The 30 ft cable should be routed with enough strain relief and protection from sharp edges, heat, and moving gear. As with any stern-mounted sensor, leave service access where possible so the bracket and sensor face can be inspected after trailering, storage, or running in debris-heavy water.

Compatibility and fit

The E26027-PZ is best matched to boats using Raymarine ST40 instruments where a P66 transom-mount depth transducer is required. It is not a speed, temperature, or CHIRP transducer, so it should be selected when the installation only needs depth data.

This is a good fit for owners maintaining an existing ST40 depth setup, replacing a damaged stern-mounted sensor, or outfitting a small powerboat where a simple analog depth transducer is enough for navigation awareness.