826800A9 Mercury Detonation Controller | Genuine Used Part

🔧 Product Description

Genuine Mercury Detonation Controller Assembly - Part Number: 826800A9

A genuine Mercury detonation controller assembly used on selected Mercury 2.5L V6 EFI two-stroke ignition systems. This module forms part of the knock / detonation protection circuit and helps manage ignition timing response when detonation is detected.

⚙️ Key Features

• Genuine Mercury detonation controller assembly

• Correct Mercury part number 826800A9

• Related to 826800A7 and 826800A8 detonation-control references

• Used on selected Mercury 2.5L V6 EFI two-stroke applications

• Must be matched by engine serial number, wiring layout and ignition-system configuration

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 826800A9 later detonation controller reference

• 826800A8 earlier / related detonation controller reference

• 826800A7 earlier / related detonation controller reference

OEM / Related Numbers:

• 826800A9

• 826800A8

• 826800A7

• Detonation controller assembly

• Detonation control module

• Knock control module

• Related Mercury detonation sensor circuit reference

• Related Mercury V6 timing / advance control family reference

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Mercury V6 EFI two-stroke detonation-control systems

Typically suits:

• Engine models:

• Mercury 150 EFI Pro Max 2.5L detonation-control applications where specified

• Mercury 200 EFI Pro Max 2.5L detonation-control applications where specified

• Mercury 200 EFI Super Magnum 2.5L detonation-control applications where specified

• Mercury V-150 MAG / EFI applications using detonation controller modules

• Mercury V-150 XRI EFI applications using detonation controller modules

• Mercury V-175 SKI / MAG / EFI applications using detonation controller modules

• Mercury V-175 XRI EFI applications using detonation controller modules

• Mercury V-200 MAG / EFI applications using detonation controller modules

• Mercury V-200 XRI EFI applications using detonation controller modules

• Mercury V-220 Laser EFI applications using detonation controller modules

• Mercury 200HP EFI 2-stroke applications around 2000 model year using 826800A9

• Mercury 200HP EFI 2-stroke serial 0T148227 donor-family reference using 826800A9

• HP Range: commonly 150HP - 220HP Mercury V6 EFI two-stroke applications where specified

• Engine Type: Mercury 2.5L V6 EFI two-stroke outboard

• System Type: Detonation / knock protection control module

• Serial Note: Confirm engine serial number, detonation sensor, switch-box bias circuit and ignition module layout before installation.

🔌 Function

The detonation controller monitors detonation-related input and interfaces with the ignition system to help protect the engine from damaging knock by altering ignition control when required.

Common signs of failure:

• Detonation-control fault after sensor and wiring checks

• Unstable timing response

• Engine warning or performance reduction related to knock circuit

• Intermittent loss of timing control

• Fault isolated to detonation module after switch-box and harness testing

• Heat or vibration-related module failure

• Corrosion or broken wires at controller plug

📦 Condition

• Genuine used part

• Removed from running engine where applicable

• In good working condition unless otherwise stated