Mercury MerCruiser Depth/Temperature Sensor 8M0122505 - 10ft
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Mercury / MerCruiser Quicksilver Depth / Temperature Sensor — 8M0122505 (10 ft)
The Mercury Quicksilver 8M0122505 is a genuine OEM through-hull depth and water-temperature sensor designed for boats equipped with Mercury SmartCraft engine monitoring systems. It provides real-time depth readings and water temperature data to compatible gauges or multifunction displays.
Key Specifications
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Part Number: 8M0122505 (Mercury format 79-8M0122505)
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Cable Length: 10 ft (3 m)
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Sensor Type: Through-hull depth & temperature transducer
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Beam Angle: 12° conical sonar beam
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Maximum Useful Depth: approx. 100 m (328 ft)
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Recommended Deadrise: 16°–24° hull angle
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OEM Brand: Mercury Marine / Quicksilver
Compatible Systems
This sensor is designed for boats equipped with Mercury SmartCraft electronics, including:
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SmartCraft SC1000 gauges
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SmartCraft VesselView displays
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Other compatible Mercury depth-capable display systems
It typically works with 2002 and newer SmartCraft-equipped Mercury engines.
Function
The sensor performs two primary functions:
Depth Measurement
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Uses sonar pulses from the hull-mounted transducer
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Sends depth data to SmartCraft displays to help avoid shallow water hazards
Water Temperature Monitoring
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Measures water temperature at the hull
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Sends readings to engine displays or marine electronics for navigation and fishing use
What’s Included
Kit contents include:
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Through-hull depth/temperature transducer
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10-ft cable harness
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Fuse kit and mounting hardware
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Installation hardware for through-hull mounting
Superseded / Related Numbers
Mercury has updated this sensor over time. Related numbers include:
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888828
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888828A1 / 888828A3
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8M0075629
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8M0062110
⚠️ Fitment Tip:
Always verify compatibility with the SmartCraft display or gauge system installed on the boat. Some Mercury displays require specific transducer models or cable lengths.
Shipping:
OEM parts ship same or next day for fast Canada wide shipping.
Technical Specifications:
- Type: Dual-function depth and temperature sensor
- Cable Length: 10 feet
- Compatible with: Mercury MerCruiser marine instrumentation systems
- Part Number: 8M0122505
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.