Raymarine B17 Bronze Retractable Through-Hull Depth Transducer, For ST70/ST60+/ST290 Instruments, 200 kHz, 45 ft Cable

Overview

The Raymarine M78717 is a B17 bronze retractable through-hull depth transducer for Raymarine instrument systems. It is a depth-only transducer that operates at 200 kHz with a 13 degree beam width, giving boaters a dedicated depth signal for compatible analog instrument displays and interfaces.

This unit uses a 2-inch bronze through-hull fitting and is suitable for fiberglass and wood hulls. The retractable core lets the insert be removed for cleaning and service, which is useful when growth or debris affects readings and access from inside the hull is available.

A 15-meter, 45-foot cable with ISO female spade connectors is included on the transducer, giving installers enough length for many helm, cockpit, or instrument-panel runs without immediately planning an extension.

Key features

• Bronze through-hull depth transducer for fiberglass and wood hull installations.
• Retractable insert allows cleaning and maintenance from inside the vessel when the installation layout permits access.
• 200 kHz depth operation with a 13 degree beam width for use with compatible Raymarine instrument systems.
• 2-inch hull opening requirement helps confirm fit before replacing an existing through-hull or planning a new installation.
• 15-meter, 45-foot cable with ISO female spade connectors supports typical instrument runs on many sailboats and cruising powerboats.
• Compatible with Raymarine analog depth instruments and interfaces including i40 Depth, i50 Depth, iTC-5, ST60+ Depth, and other legacy instrument systems.

Compatibility and fit

This transducer is a good match for owners maintaining or upgrading a Raymarine instrument setup that needs a dedicated through-hull depth source rather than a multifunction sonar transducer. It is commonly used on sailboats and cruising boats where a low-profile through-hull installation is preferred over a transom-mounted sensor.

Before installation, confirm the display or interface accepts this analog depth transducer connection and that the hull material is fiberglass or wood. Bronze through-hull fittings are not generally selected for aluminum hulls because of corrosion concerns between dissimilar metals.

Installation and service

The installation requires a 2-inch hole through the hull and a dry, accessible interior location around the fitting. Bedding, tightening, and cable routing should follow normal through-hull installation practices for the vessel, with the cable protected from chafe and kept clear of high-current wiring where practical.

The removable core is helpful for seasonal cleaning and service, especially on boats kept in the water where marine growth can collect around sensors. Keeping the face of the transducer clean helps maintain consistent depth readings during coastal cruising, fishing, docking, and shallow-water navigation.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Orders of $100 or more qualify for free shipping when eligible. For orders under $100, shipping costs are calculated at checkout based on destination, package weight, and selected service. International shipping is available for eligible products, and certain items may require additional handling, warehouse transfers, or may ship directly from the manufacturer, which can affect processing time.

Deliveries are handled by preferred carriers such as USPS, UPS, FedEx, DHL, and others depending on your location and selected service. Estimated delivery times are displayed at checkout and may vary due to customs processing, carrier delays, weather, postal disruptions, or other circumstances beyond our control. Once your order ships, you'll receive a confirmation email with tracking information. Tracking may take up to 24 hours to update on the carrier's website and is also available through your account when applicable.

We ship throughout the United States and to most international destinations for products eligible for international shipping. International orders may be subject to customs duties, taxes, brokerage charges, or other import fees, which are the customer's responsibility and are not included in the product or shipping price. PO Boxes are accepted only when shipping through USPS, and not all packages qualify for this option. If your order does not arrive within the estimated delivery window, please contact us at info@apollolighting.com or +1 (954) 375-0100 so we can assist with locating your package.

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Returns may be requested within 30 days of receiving your order. Items must be unused, uninstalled, unaltered, and returned in their original packaging with all tags, packing materials, blank warranty cards, manuals, instructions, accessories, and included items. Certain products, including installed or used electronics, electrical components, lighting, consumables, custom or special-order items, cut-to-length products, safety equipment, and merchandise exposed to water or marine conditions, may not be eligible for return.

To request a return, sign in to your account and select the applicable order and items, and submit your request for review. Eligible unfulfilled items may also be submitted for cancellation within 1 hour of placing the order. Returns or cancellations are not considered approved until you receive confirmation from Apollo Lighting. Please do not ship or drop off merchandise before receiving return approval and instructions.

Customers are responsible for arranging and paying for return shipping unless the return is due to an error by Apollo Lighting or the item is verified as defective, damaged, or incorrect. Missing, damaged, defective, or incorrect items must be reported within 2 business days of delivery, and photos or other documentation may be required for review. If the issue is verified, Apollo Lighting may provide or reimburse return shipping and issue a replacement or refund depending on the circumstances. International customers are responsible for return shipping, duties, taxes, customs charges, brokerage fees, and other costs associated with an international return.

After your return is received and inspected, approved refunds are issued to the original payment method and may take 5-7 business days to appear after processing. Original shipping and handling charges are nonrefundable, and the value of any included free items that are not returned may be deducted from the refund. Apollo Lighting does not charge a standard restocking fee on eligible returns. Returns that are incomplete, damaged, installed, used, altered, improperly packaged, or otherwise do not meet the eligibility requirements may be refused. We recommend using a trackable and appropriately insured shipping service for all customer-arranged returns.

For assistance, contact info@apollolighting.com or call +1 (954) 375-0100.

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Many products sold by Apollo Lighting include a manufacturer's warranty covering defects in materials or workmanship. Warranty terms vary by brand, product category, and model, so eligibility, coverage duration, exclusions, and available remedies are determined by the applicable manufacturer. We recommend reviewing the warranty information provided with your product before installation or use, especially for marine electronics, navigation equipment, lighting, electrical systems, pumps, safety equipment, and other specialized marine products.

If you need warranty service, the claim must follow the process established by the manufacturer, authorized service center, or designated warranty provider. You may be asked for proof of purchase, a serial number, product registration, photos, maintenance or installation records, or other documentation. Apollo Lighting does not determine or modify a manufacturer's warranty coverage or final claim decision, but we are happy to help provide purchase information and direct you to the appropriate manufacturer or warranty resource.

Keep your receipt, product documentation, serial number information, and original packaging when practical. Damage caused by normal wear, misuse, improper installation, insufficient maintenance, corrosion, impact, unauthorized modifications, electrical issues, or operation outside the manufacturer's specifications may not be covered. Warranty claims are separate from standard returns, so a product that has been installed, used, or exposed to marine conditions may no longer qualify for return while still remaining eligible for evaluation under the manufacturer's applicable warranty.

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