# 14857A16 Mercury Oil Module | Genuine Used Part

🔧 Product Description

  

Genuine Mercury Oil Warning Module - Part Number: 14857A16

  

A genuine Mercury oil warning module used on selected Mercury and Mariner two-stroke outboards with oil injection. This module monitors the oil warning circuit and activates the warning horn when a low-oil or oil-system fault condition is detected.

  

⚙️ Key Features

  

• Genuine Mercury oil warning module

• Correct OEM part number 14857A16

• Used on selected 2-cylinder, 3-cylinder and 4-cylinder two-stroke oil-injection systems

• Cross-references with CDI and Sierra replacement modules

• Match by original module number, wiring colours and engine serial range

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 14857A16 → Supersedes 14857A15

• 14857A15 → Supersedes 14857A14

• 14857A14 → Supersedes 14857A13

• 14857A13 → Supersedes 14857A12

• 14857A12 → Supersedes 14857A11

• 14857A11 → Supersedes 14857A10

• 14857A10 → Supersedes 14857A9

• 14857A9 → Supersedes 14857A8

• 14857A8 → Supersedes 14857A7

• 14857A7 → Supersedes 14857A6

• 14857A6 → Supersedes 14857A4

• 14857A4 → Supersedes 14857A3

• 14857A3 → Supersedes 14857A2

• 14857A2 → Supersedes 14857A1

• 14857A1 → Supersedes 14857

  

OEM / Related Numbers:

  

• 14857A16

• 14857-A16

• 1485716

• 14857A15

• 14857A14

• 14857A13

• 14857A12

• 14857A11

• 14857A10

• 14857A9

• 14857A8

• 14857A7

• 14857A6

• 14857A4

• 14857A3

• 14857A2

• 14857A1

• 14857

• Oil warning module

• Low oil warning module

  

Aftermarket / Verified Equivalents:

  

• CDI Electronics: 144-4857-16

• Sierra: 18-99411

  

🚤 Compatibility

  

Commonly used on:

  

• Mercury / Mariner two-stroke oil-injection warning systems

  

Typically suits:

  

• Engine models:

• Mercury 2-cylinder oil-injected two-stroke outboards - 1990-1999

• Mariner 2-cylinder oil-injected two-stroke outboards - 1990-1999

• Mercury 3-cylinder oil-injected two-stroke outboards - 1990-1999

• Mariner 3-cylinder oil-injected two-stroke outboards - 1990-1999

• Mercury 4-cylinder oil-injected two-stroke outboards - 1990-1999

• Mariner 4-cylinder oil-injected two-stroke outboards - 1990-1999

• Mercury SportJet oil-injected two-stroke engines - 1990-1999

• Mercury 70HP 3-cylinder - serial 0B240451 to 0C221999

• Mercury 75HP 3-cylinder - serial 0B240451 to 0C221999

• Mercury 80HP 3-cylinder - serial 0B240451 to 0C221999

• Mariner 80HP 3-cylinder - serial 0B240451 to 0C221999

  

• HP Range: commonly 40HP - 125HP for 2, 3 and 4-cylinder oil-injected applications

• Engine Type: Mercury / Mariner two-stroke outboard and SportJet oil-injection warning system

• Year Range: approximately 1990 - 1999

• Serial Range: confirmed 3-cylinder usage includes 0B240451 to 0C221999; match other applications by serial-numbered oil-injection diagram.

  

🔌 Function

  

The oil warning module monitors oil-injection warning inputs and controls the warning horn when the oil system needs attention.

  

Common signs of failure:

  

• Warning horn sounds with oil level and sensors confirmed good

• No warning horn during self-test

• False oil alarm

• Intermittent alarm while running

• Burnt or corroded module wiring

• Alarm changes when module harness is moved

• Fault clears when a known-good module is fitted

  

📦 Condition

  

• Genuine used part

• Removed from running engine where applicable

• In good working condition unless otherwise stated

## Details

- **Price:** 50.0 AUD
- **Vendor:** Sawley's Auto and Marine
- **Tags:** Sawley’s AAM Used Parts – Electronic Components | ECU CDI & Electrical Parts

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 50.00 AUD | In stock |

## Images

- 14857A16 Mercury Oil Module | Genuine Used Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/14857a16-mercury-oil-module-genuine-used-part)
> Updated: 2026-07-01