# 8M0084173 Mercury Regulator | Genuine Used Part

🔧 Product Description

  

Genuine Mercury Voltage Regulator / Rectifier - Part Number: 8M0084173

  

A genuine OEM marine electrical component used in the matching engine system. This part requires exact part-number, model and serial confirmation before fitting.

  

⚙️ Key Features

  

• Genuine OEM electrical component

• Correct part number reference 8M0084173

• Used in model-specific marine electrical systems

• Includes cross-reference and equivalent data where available

• Requires exact connector and serial / model verification

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 8M0084173 later Mercury regulator reference

• 8M0045112 related earlier / alternate service reference

• 883072T earlier regulator reference

• 854515T1 earlier regulator reference

• 854514T1 earlier regulator reference

• 830179A3 earlier regulator reference

• 830179A2 earlier regulator reference

• 815279A2 earlier regulator reference

  

OEM / Related Numbers:

  

• 8M0084173

• 8M0045112

• 815279T5

• 815279A2

• 830179A2

• 830179A3

• 854514

• 854514T1

• 854515

• 854515T1

• 883072T

• Yamaha related reference: 65W-81960-00-00

  

Aftermarket / Verified Equivalents:

  

• CDI Electronics: 194-5279

• Sierra: 18-5741

• Sierra: 18-5742

• Sierra: 18-5743

• Sierra: 18-5744

• Mallory: 9-17101

  

🚤 Compatibility

  

Commonly used on:

  

• Mercury Voltage Regulator / Rectifier applications

  

Typically suits:

  

• Engine models:

• Mercury 25HP - 40HP 2-cylinder applications, approximately 1995-2005

• Mercury 45HP - 90HP 3-cylinder applications, approximately 1987-2007

• Mercury 90HP - 125HP 4-cylinder applications, approximately 1989-2006

• Mercury 150HP - 225HP V6 applications, approximately 1992-2000

• Force 40HP - 150HP applications where specified

  

• HP Range: 25HP - 225HP Mercury / Mariner plus selected Force applications

• Engine Type: Mercury / Mariner / Force outboard charging system

• Year Range: approximately 1987 - 2007 depending on horsepower

• Serial / Model Note: Match by serial-numbered charging diagram, regulator wire count and plug layout.

  

🔌 Function

  

This part performs its assigned charging, ignition, signal or harness function in the outboard electrical system.

  

Common signs of failure:

  

• Battery not charging

• Overcharging or high battery voltage

• Charging warning or tachometer fault

• Burnt or melted regulator plug

• Blown charging-system fuse

• Battery goes flat after running

• Voltage remains incorrect after stator and battery checks

  

📦 Condition

  

• Genuine used part

• Removed from running engine where applicable

• In good working condition unless otherwise stated

## Details

- **Price:** 75.0 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 | 75.00 AUD | In stock |

## Images

- 8M0084173 Mercury Regulator | Genuine Used Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/8m0084173-mercury-regulator-genuine-used-part)
> Updated: 2026-06-29