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Water Pressure Sensor 8M6000626 – Fits Mercury / MerCruiser
- $89.77
- $89.77
- Unit price
- per
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How to Match This Part
This aftermarket engine water pressure sensor replaces Mercury Marine 8M6000626 and the current catalog reference 881879T11, along with the earlier numbers those references supersede. It is a 0–100 PSI pressure sender used to report cooling-system water pressure on compatible Mercury, Mariner, and MerCruiser applications. The same sensor family can also appear in oil or pitot pressure positions on some engines, so the number on the part you remove is the decisive check.
Match this part in this order:
1. Number stamped on the sensor you remove — look for 8M6000626, 881879T11, or one of the verified earlier numbers below
2. Engine model and serial number — Mercury outboards: plate on the transom bracket or cowl; MerCruiser: engine block, flame-arrestor cover, or near the ignition-coil bracket
3. Physical form — threaded metal pressure port, hex tool body, and molded electrical connector with locking tab (compare with the product images)
Do not confuse this sender with Verado-style water-pressure assemblies that use a different mounting and tube fitting, or with MAP / intake-manifold pressure sensors. If the connector, thread, or body shape differs from the images, do not install this part even when the horsepower overlaps.
Part Number Cross-Reference
Use these verified numbers to confirm you have the correct pressure sensor. Brand names and OEM numbers are for identification only.
| Type | Brand | Part Number | Notes |
|---|---|---|---|
| OEM | Mercury Marine | 8M6000626 | Primary reference (often printed on the sensor body) |
| OEM | Mercury / Quicksilver | 881879T11 | Current catalog water pressure sensor (0–100 PSI) |
| OEM | Mercury Marine | 881879A6 | Earlier number; superseded by 881879T11 |
| OEM | Mercury Marine | 881879011 | Earlier 0–100 PSI pressure sensor; superseded toward 881879T11 |
| OEM | Mercury Marine | 859210T | Earlier related number replaced by 881879T11 |
| OEM | Mercury Marine | 859210 | Earlier related number replaced by 881879T11 |
| OEM | Mercury Marine | 859604A1 | Earlier related assembly in the same 0–100 PSI replacement chain |
This is an aftermarket part manufactured by JLM Marine. It is not sold as a genuine Mercury Marine, Mariner, Quicksilver, or MerCruiser component.
Compatible Engine Models
Confirm the OEM number on the sensor you remove, then match your engine model and serial number. For Mercury outboards use the Mercury Serial Number Guide and Mercury Parts Diagrams. Mariner-badged engines that use the same Mercury OEM number are covered the same way. MerCruiser identification is on the engine, not on an outboard transom bracket.
| Brand | Engine Family | Coverage | Notes |
|---|---|---|---|
| Mercury / Mariner | Select FourStroke and 2-stroke outboards | Select 75–300 HP | Includes select DFI, Jet, Pro XS, and Sport XS applications — confirm by OEM number and parts diagram |
| MerCruiser | Sterndrive / inboard V6 & V8 MPI | 305, 350, 377, 496, 502 CID | 0–100 PSI water / oil / pitot pressure applications — confirm serial and sensor location |
| MerCruiser | 4.3L / 5.0L / 5.7L / 6.2L MPI Alpha & Bravo families | See engine parts listing | Catalog Where Used lists multiple serial blocks — verify yours before ordering |
| MerCruiser | 350 MAG / 377 MAG / 496 MAG / 8.2L Mag & related MPI | See engine parts listing | Confirm the pressure-sensor callout in the engine-specific diagram |
| Mercury | Select DFI / Pro XS outboards (e.g. 200XS / 200 Pro XS 3.0L) | Serial-specific | Match the OEM number on the sensor and the model parts diagram |
Technical Specifications
| Specification | Value |
|---|---|
| Product type | Engine water pressure sensor (0–100 PSI pressure sender) |
| Primary OEM reference | 8M6000626 |
| Current catalog reference | 881879T11 |
| Pressure range | 0–100 PSI |
| Monitoring application | Cooling-system water pressure (also used for oil / pitot pressure on some engines) |
| Physical interface | Male threaded pressure port, hex wrench body, molded electrical connector with locking tab |
| Condition | Brand-new aftermarket production — not remanufactured |
Installation Guide
- 1Shut the engine down, remove the key, allow it to cool, and disconnect the negative battery cable before touching the sensor or harness.
- 2Locate the water pressure sensor using the engine-specific service information, then confirm the original part number before removal.
- 3Press the locking tab and unplug the harness connector without pulling on the wires. Inspect the plug for corrosion or moisture.
- 4Unscrew the old sensor with a correctly sized wrench on the hex flat only. Never twist on the plastic connector housing. Keep debris out of the pressure passage.
- 5Compare thread, hex body, and connector shape with the product images. Start the new sensor by hand to avoid cross-threading, then tighten to the torque in your Mercury / MerCruiser service manual. Apply sealant only if the manual requires it.
- 6Reconnect the plug and battery, run the engine per the service procedure, and confirm a stable pressure reading with no leakage at the sensor.
Note: Professional installation is recommended for cooling-system pressure sensors.
Troubleshooting & FAQ
Important Notes
- Verify that the product images and the number on your original sensor match this family (8M6000626 / 881879T11 and verified earlier numbers), including thread, hex body, and connector. If anything differs, do not install the sensor even if the engine family appears in the table.
- This is an aftermarket replacement and is not a genuine Mercury Marine OEM component.
- Do not invent a torque value or sealant procedure — follow the engine-specific service manual.
- Professional installation and a post-installation leak and signal check are recommended.
Why Choose JLM MARINE?
- Precision Fit: Cross-referenced to Mercury 8M6000626 / 881879T11 and the verified earlier numbers listed above.
- Quality Control: Each batch is inspected for dimensional consistency and workmanship.
- Direct from Manufacturer: Aftermarket marine sensors engineered for reliable cooling-system pressure feedback on compatible Mercury, Mariner, and MerCruiser engines.
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