# 718M0157742 Mercury MerCruiser Sensor | Genuine Quicksilver OEM Part

🔧 Product Description

  

Genuine Quicksilver Water Pressure Sensor - Part Number: 71-8M0157742

  

Genuine Quicksilver/Mercury water pressure sensor for selected Mercury outboard and MerCruiser engine applications. This OEM 0-100 PSI pressure sensor monitors cooling-water pressure and helps the engine management system detect cooling-flow issues before they cause overheating damage.

  

⚙️ Key Features

  

• Genuine Quicksilver/Mercury OEM water pressure sensor

• 0-100 PSI pressure sensor application

• Used for cooling-water pressure monitoring

• Supersedes earlier 8M6000623, 881879010 and 8818793 sensor references

• Helps support engine protection systems and warning functions

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 71-8M0157742 → Supersedes 8M6000623

• 8M6000623 → Supersedes 881879010

• 881879010 → Supersedes 8818793

• 8818793 earlier OEM reference

  

OEM / Related Numbers:

  

• 71-8M0157742

• 8M0157742

• 718M0157742

• 8M6000623

• 881879010

• 8818793

• 881879T11 related pressure sensor reference

  

Aftermarket / Verified Equivalents:

  

• Recmar: REC8M6000623

  

🚤 Compatibility

  

Commonly used on:

  

• Mercury outboard cooling-water pressure monitoring systems

• MerCruiser sterndrive and inboard water pressure monitoring systems

• Mercury / MerCruiser applications using 0-100 PSI water pressure sensor

  

Typically suits:

  

• Engine models:

• Mercury 2-stroke outboard applications using 71-8M0157742 water pressure sensor

• Mercury OptiMax / DFI applications using 8M6000623 / 8M0157742 water pressure sensor

• Mercury Verado / high-output applications where 71-8M0157742 is specified in the cooling pressure circuit

• Mercury Pro XS and Racing applications where 71-8M0157742 is specified by the cooling-pressure parts diagram

• MerCruiser sterndrive engines using 71-8M0157742 water pressure sensor

• MerCruiser inboard engines using 71-8M0157742 water pressure sensor

• MerCruiser 350 MPI applications using the matching cooling-water pressure sensor

• MerCruiser V6 and V8 ECM-monitored cooling systems using 8818793, 881879010, 8M6000623 or 71-8M0157742

  

• HP Range: Application dependent across Mercury outboard and MerCruiser stern drive / inboard engines

• Engine Type: Mercury / MerCruiser cooling-water pressure sensor system

• Year Range: Application dependent by engine family, serial number and ECM sensor configuration

  

🔌 Function

  

The water pressure sensor measures cooling-water pressure and sends that information to the engine management or monitoring system. Accurate pressure feedback helps identify water pump, blockage or cooling-flow problems before overheating damage occurs.

  

Common signs of failure:

  

• Water pressure fault or alarm

• Incorrect or unstable water pressure reading

• Engine guardian or warning activation

• Low pressure warning despite normal water flow

• Corroded or damaged sensor connector

• Sensor leakage or contamination

• Overheating diagnosis requiring pressure sensor testing

  

📦 Condition

  

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 118.1 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 118.10 AUD | In stock |

## Images

- 718M0157742 Mercury MerCruiser Sensor | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](www.sawleysautoandmarine.com.au/products/718m0157742-mercury-mercruiser-sensor-genuine-quicksilver-oem-part)
> Updated: 2026-05-17