Description

Mercury / MerCruiser Quicksilver Pressure Sensor — 881879T11

The Mercury Quicksilver 881879T11 Pressure Sensor is a genuine OEM water or oil pressure sensor used on many Mercury outboards and MerCruiser gasoline engines. It measures system pressure and sends data to the engine control module or gauges to help monitor engine health and cooling system performance.

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Key Specifications

• Part Number: 881879T11

• Component Type: Pressure sensor / pressure sender

• Pressure Range:0–100 PSI

• OEM Brand: Mercury Marine / Quicksilver

• Replaces: 881879A6 and other earlier versions

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Compatible Engines / Applications

Commonly used on Mercury outboards and MerCruiser MPI engines, including:

Mercury / Mariner Outboards

• 75–300 HP FourStroke and 2-stroke models

• DFI, Jet, Pro XS, and Sport XS engines

MerCruiser Sterndrive & Inboard Engines

• 305 CID (5.0L) V8

• 350 CID (5.7L) V8

• 377 CID V8

• 496 CID V8

• 502 CID V8 MPI engines

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Function

The pressure sensor monitors engine cooling or oil pressure and sends readings to the engine management system or instrument gauges. The information helps detect issues such as:

• Low cooling water pressure

• Oil pressure loss

• Cooling system restrictions

Accurate pressure monitoring helps protect the engine from overheating or lubrication failure.

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Symptoms of a Faulty Pressure Sensor

A failing pressure sensor may cause:

• Erratic or incorrect pressure gauge readings

• Warning alarms on SmartCraft or engine gauges

• Fault codes related to cooling or oil pressure

Replacing the sensor restores accurate monitoring and helps maintain proper engine protection.

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Fitment Tip:
Always confirm compatibility using the engine model and serial number. Mercury engines use several similar pressure sensors with different calibration ranges and connectors depending on the engine platform.

Shipping:

OEM parts ship same or next day for fast Canada wide shipping.

Technical Specifications:

• Type: Pressure sensor
• Compatible with: Mercury MerCruiser marine engines
• Part Number: 881879T11