# 881364T04 Mercury Harness | Genuine Used Part

🔧 Product Description

  

Genuine Mercury 115 EFI FourStroke Harness Assembly - Part Number: 881364T04

  

A genuine Mercury engine wiring harness assembly used on selected 115HP EFI four-stroke outboards. This harness connects ECU, sensor, ignition, charging and engine-management circuits within the engine cowling.

  

⚙️ Key Features

  

• Genuine Mercury harness assembly

• Correct Mercury part number 881364T04

• Used on selected Mercury / Mariner 115 EFI FourStroke outboards

• Related to 881364T05 and 881364T03 harness family references

• Must be matched by engine serial number and connector layout

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 881364T04 current / listed harness assembly reference

  

OEM / Related Numbers:

  

• 881364T04

• 84-881364T04

• Related harness family reference: 881364T05

• Related harness family reference: 881364T03

• Related 115 EFI FourStroke harness assembly references

• Related Mercury / Mariner engine wiring harness family reference

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• Mercury 115 EFI four-stroke engine wiring systems

  

Typically suits:

  

• Engine models:

• Mercury 115 EFI FourStroke - serial 0T178500 to 0T800999 where the serial-numbered diagram specifies 881364T04

• Mercury 115 EFI FourStroke - serial 0T801000 to 1B226999 where the serial-numbered diagram specifies 881364T04

• Mariner 115 EFI FourStroke - serial 0T178500 to 0T800999 where the serial-numbered diagram specifies 881364T04

• Mariner 115 EFI FourStroke - serial 0T801000 to 1B226999 where the serial-numbered diagram specifies 881364T04

• Mercury 115 EFI four-stroke electrical components using 881364T04

• Mercury / Mariner 115 EFI engine wiring harness applications shown on the serial-numbered electrical diagram

  

• HP Range: 115HP

• Engine Type: Mercury / Mariner EFI four-stroke outboard

• Serial Range: commonly 0T178500 to 1B226999 for 115 EFI FourStroke harness-family applications where specified

• System Type: Engine wiring harness assembly

• Fitment Note: Confirm serial number, harness branch layout, plug style and ECU type before installation.

  

🔌 Function

  

The harness carries electrical power, grounds, sensor signals, ignition signals and ECU communication circuits through the engine electrical system.

  

Common signs of failure:

  

• No-start caused by broken wiring

• Intermittent cut-out when harness is moved

• Sensor faults caused by corroded connectors

• Charging or ignition faults traced to harness damage

• ECU communication faults

• Brittle, burnt or oil-soaked insulation

• Damaged pins, plugs or harness branches

  

📦 Condition

  

• Genuine used part

• Removed from running engine where applicable

• In good working condition unless otherwise stated

## Details

- **Price:** 130.0 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 | 130.00 AUD | In stock |

## Images

- 881364T04 Mercury Harness | Genuine Used Part

---

> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/881364t04-mercury-harness-genuine-used-part)
> Updated: 2026-06-29