Raymarine Fairing Block, For B744V and B744VL Transducers

Overview

The Raymarine E66023 is a high-performance fairing block for Raymarine B744V and B744VL thru-hull transducers. It helps the transducer sit at the correct angle on the hull so the sonar face can run cleaner through the water, which matters most when the boat is underway and water flow around the fitting becomes less forgiving.

This block is made from urethane and measures approximately 3 inches high by 3 inches wide by 13.73 inches long. It is a fit-focused transducer mounting accessory, not a transducer by itself, so the B744V or B744VL thru-hull transducer is required separately.

Use it when a thru-hull installation needs a fairer shape outside the hull rather than a simple flush mounting approach. On fishing boats, cruisers, and other vessels that rely on steady depth, speed, and temperature readings from a B744-series triducer, the fairing block helps reduce disturbed water at the sensor face.

Key features

• Matches Raymarine B744V and B744VL thru-hull transducers for compatible installations.
• Urethane construction suits the underwater mounting role and can be shaped for hull fit during installation.
• Fairing profile helps reduce turbulence around the transducer face when the vessel is moving.
• Supports correct angular positioning of the transducer on the hull for cleaner sonar readings underway.
• Approximate product dimensions are 3 inches high by 3 inches wide by 13.73 inches long.
• Useful for installations where a thru-hull triducer needs fair water flow rather than sitting directly against a sloped hull surface.

Installation and fit

Before cutting or bedding anything, confirm the installed transducer is a Raymarine B744V or B744VL model and check the hull location for clean water flow. The fairing block is normally fitted on the outside of the hull and trimmed or oriented so the transducer face sits correctly relative to the waterline.

Because this part is installed below the waterline, surface preparation, bedding compound selection, and final tightening should follow normal thru-hull installation practice for the vessel material. The block should sit evenly against the hull, with no rocking or gaps that could affect sealing or water flow.

Use on board

This is a practical replacement or installation part for boats using a B744-series thru-hull triducer where readings need to stay stable while running. It is especially relevant for owners who use their sonar for depth awareness, fishfinding, and temperature or speed data while cruising, fishing, or navigating in changing bottom conditions.