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Temperature Sensor 8M0010146 – Mercury Verado & MerCruiser
- $49.77
- $49.77
- Unit price
- per
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How to Match This Part
This brand-new aftermarket engine temperature sensor replaces Mercury / Mariner / Quicksilver 8M0010146, along with the related numbers 8M0142542 and current reference 8M0205787. It is a threaded probe-style temperature sensor for listed Mercury Verado outboards and MerCruiser applications.
Match this part in this order:
1. Number on the sensor you remove — 8M0010146, 8M0142542, or 8M0205787
2. Engine family — Verado within the 135–450 HP coverage below, or listed MerCruiser Bravo / 3.0L applications
3. Serial number on the outboard ID plate / midsection bracket (or MerCruiser engine ID plate) against the notes, then compare the threaded probe, hex body, O-ring, short two-wire lead, and blue-lock connector with the product images
A superseded Mercury reference may look slightly different while remaining the functional replacement. Do not order by horsepower alone when serial ranges apply.
Part Number Cross-Reference
Use these verified Mercury numbers to confirm you have the correct temperature sensor. Brand names and OEM numbers are for identification only.
| Type | Brand | Part Number | Notes |
|---|---|---|---|
| OEM | Mercury / Mariner / Quicksilver | 8M0010146 | Primary / earlier temperature sensor reference |
| OEM | Mercury / Mariner / Quicksilver | 8M0142542 | Intermediate number; superseded by 8M0205787 |
| OEM | Mercury / Mariner / Quicksilver | 8M0205787 | Current functional replacement reference |
This is an aftermarket part manufactured by JLM Marine. It is not sold as a genuine Mercury Marine, Mariner, or Quicksilver component.
Compatible Engine Models
Confirm your engine model and serial number before ordering. For Mercury / Mariner outboards, use the Mercury Serial Number Guide and Mercury Parts Diagrams. For MerCruiser, use the engine identification plate on the engine — not an outboard transom-bracket location.
| Brand | Engine Family | Rated HP / Models | Serial / Notes |
|---|---|---|---|
| Mercury / Mariner | Verado L4 / L6 | 135–450 HP Verado coverage | Dealer where-used includes serial blocks such as 1B381712–2B577714 (135–300) and 2B141124 / 2B618256 families (350 / 400); 450R from 1E080500 & Up — confirm on your temperature-sensor diagram |
| Mercury / Mariner | Verado / FourStroke V6 3.4L & V8 4.6L | Within the 135–450 HP Verado application set | Confirm the OEM number on the sensor you remove and the model-specific parts diagram |
| MerCruiser | Bravo One / Two / Three; 3.0L | Temperature-sensor applications listed for this OEM chain | Dealer where-used notes include Bravo 0W250000 & Up and 3.0L 70380001 & Up — match the OEM number on the original sensor |
Always match the number stamped on the sensor you remove. Engines outside these groups, or applications above 450 HP, use different temperature-sensor part numbers.
Technical Specifications
| Specification | Value |
|---|---|
| Part type | Engine temperature sensor |
| Primary OEM number replaced | 8M0010146 |
| Related / current OEM numbers | 8M0142542; current reference 8M0205787 |
| Mounting form | Threaded probe with hex drive body |
| Seal | Fitted black O-ring at thread base (as shown on product images) |
| Electrical lead | Short black sheathed two-wire lead |
| Connector | Black two-pin plug with blue locking clip |
| Condition | Brand new; not remanufactured |
Installation Guide
- 1Allow the engine to cool fully, switch the ignition off, and disconnect the negative battery cable.
- 2Locate the original temperature sensor on the model- and serial-specific parts diagram. Confirm the OEM number and connector shape before removal.
- 3Release the blue connector lock and unplug the sensor by the connector housing. Do not pull on the wires.
- 4Place an absorbent cloth below the sensor, remove the old unit with the correct wrench on the hex body, and keep debris out of the threaded opening.
- 5Confirm the replacement O-ring is seated, start the sensor by hand to prevent cross-threading, and tighten it to the torque in your Mercury / MerCruiser service manual for that engine.
- 6Reconnect the plug until it locks, reconnect the battery, then run the engine per the service procedure while checking for leakage, warning messages, and a normal temperature reading.
Note: Professional installation is recommended for engine temperature sensors on Verado and MerCruiser powerplants.
Troubleshooting & FAQ
Important Notes
- Verify the OEM number on your original sensor and your engine serial against the compatibility table before ordering.
- Confirm O-ring seating and thread engagement to avoid coolant or oil leaks after installation.
- This is an aftermarket replacement and is not a genuine Mercury Marine / Mariner / Quicksilver OEM component.
- Professional installation is recommended for Verado and MerCruiser temperature sensors.
Why Choose JLM MARINE?
- Precision Fit: Cross-referenced to Mercury 8M0010146 (covers 8M0142542 / 8M0205787) for the Verado and MerCruiser applications listed above.
- Quality Control: Each batch is inspected for dimensional consistency and workmanship.
- Direct from Manufacturer: Aftermarket marine temperature sensors engineered for reliable engine temperature feedback.
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