880891T14 Mercury ECU | Genuine Used Part

🔧 Product Description

Genuine Mercury 115 EFI FourStroke ECU / Engine Control Unit - Part Number: 880891T14

A genuine Mercury engine control unit used on selected 115HP EFI four-stroke outboards. This two-plug ECU is used on Mercury / Mariner 115 EFI FourStroke engines, including Yamaha-based 115HP four-stroke powerhead applications requiring the 880891T14 control module.

⚙️ Key Features

• Genuine Mercury ECU / engine control unit

• Correct Mercury part number 880891T14

• Two-plug ECU configuration

• Used on 115HP EFI FourStroke outboard applications

• Cross-references with Yamaha 68V-8591A-14 ECU family where specified

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 880891T14 → Replaces / supersedes 880891T12 in listed applications

• 880891T12 earlier related 115 EFI FourStroke ECU reference

OEM / Related Numbers:

• 880891T14

• 880891T12

• Related one-plug ECU reference: 880891T13

• Yamaha related ECU reference: 68V-8591A-14

• Yamaha related formatted reference: 68V-8591A-14-00

• Related ignition coil reference: 880893T10

• Related ignition coil reference: 880892T

• Related rectifier / regulator reference: 881346T

• Related ECU plate reference: 881345

• Related grommet reference: 881304

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Mercury / Mariner 115 EFI FourStroke outboard ignition and fuel-control systems

• Yamaha-based Mercury 115HP EFI four-stroke powerhead applications

Typically suits:

• Engine models:

• Mercury 115 EFI FourStroke - serial 0T178500 to 0T800999

• Mercury 115 EFI FourStroke - serial 0T801000 to 1B226999

• Mercury 115 EFI FourStroke - serial 1B227000 to 1B366822 where the serial-numbered parts list specifies 880891T14

• Mariner 115 EFI FourStroke - serial 0T178500 to 0T800999

• Mariner 115 EFI FourStroke - serial 0T801000 to 1B226999

• Mercury 115 EFI FourStroke two-plug ECU applications using 880891T14

• Yamaha F115A / Mercury 115 EFI shared ECU family applications using 68V-8591A-14 / 880891T14

• HP Range: 115HP

• Engine Type: Mercury / Mariner EFI four-stroke outboard, Yamaha-based powerhead family

• Year Range: approximately 2001 - 2005 USA emissions applications, plus listed later serial-numbered applications where 880891T14 is specified

• Serial Range: commonly 0T178500 to 1B226999, with later listed 1B227000 to 1B366822 applications requiring exact emissions and ECU-label confirmation

🔌 Function

The ECU controls fuel injection, ignition timing, idle control, sensor monitoring, fuel-pump command, diagnostic fault storage and engine-protection strategy on compatible 115 EFI FourStroke engines.

Common signs of failure:

• No-start with confirmed fuel, spark inputs and ECU power supply

• Fuel pump command missing after relay and wiring checks

• No injector pulse or unstable injector control

• No diagnostic communication

• Intermittent stalling, limp mode or misfire

• Persistent ECU-related fault codes after sensor testing

• Internal water, heat or voltage damage to ECU circuitry

📦 Condition

• Genuine used part

• Removed from running engine where applicable

• In good working condition unless otherwise stated