Mercury MerCruiser Quicksilver Water Temperature Sender 806490T
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You have 30 days to request a return. All sale items are final sale.
Mercury MerCruiser / Quicksilver Water Temperature Sender – 806490T
Monitor engine temperature accurately with the genuine Mercury Marine / Quicksilver 806490T Water Temperature Sender. This OEM sensor measures engine coolant or water temperature and sends a signal to the dashboard temperature gauge, allowing operators to monitor engine heat and detect overheating conditions early.
Manufactured to Mercury Marine’s original equipment specifications, this temperature sender provides reliable readings and is designed for use with Mercury and Quicksilver gauges on MerCruiser sterndrive and inboard engines.
Key Features
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Genuine Mercury / Quicksilver OEM water temperature sender
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Provides accurate engine water temperature readings to the dashboard gauge
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Helps detect cooling system issues and overheating
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Durable construction designed for marine engine environments
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Direct replacement for factory-installed temperature sending units
Part Details
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OEM Part Number: 806490T
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Thread Size: 3/8"-18 NPT
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Product Type: Water temperature gauge sender / temperature sending unit
Compatible Mercury MerCruiser Engines
Commonly used on MerCruiser sterndrive and inboard engines, including:
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3.0L MPI engines
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4.3L V6 engines
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5.0L / 5.7L V8 engines
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6.2L MPI engines
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454 / 502 MPI engines
Exact fitment depends on the engine model and serial number range.
Function
The sender is typically installed in the engine block or intake manifold and measures coolant temperature. It converts the temperature into an electrical signal that drives the helm temperature gauge, providing real-time engine temperature monitoring.
Important Compatibility Note
Temperature senders vary depending on engine model, gauge system, and serial number range. Always verify compatibility using the engine serial number before ordering to ensure the correct replacement part.
Shipping: Ships same or next day for fast Canada wide shipping.
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.