# 855714A3 855713A4 Mercury Switch Box | Genuine Used Part

🔧 Product Description

  

Genuine Mercury Switch Box / Ignition Power Pack - Part Numbers: 855714A3 and 855713A4

  

A genuine Mercury switch box ignition module used on selected Mercury and Mariner 2-cylinder two-stroke outboards. This switch box controls ignition triggering from the stator and trigger circuits to provide spark output to the ignition coils.

  

⚙️ Key Features

  

• Genuine Mercury switch box / ignition module

• Listed with Mercury part numbers 855714A3 and 855713A4

• Used on selected 6HP to 25HP Mercury / Mariner two-stroke outboards

• Cross-references with CDI Electronics 114-5713 replacement family

• Must be matched by exact serial number, flywheel type and ignition connector layout

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 855713A4 later / replacement switch box reference

• 855713A3 earlier related switch box reference

• 855713A2 earlier related switch box reference

• 855714A3 related switch box family reference

  

OEM / Related Numbers:

  

• 855714A3

• 855713A4

• 855713A3

• 855713A2

• 855713A 2

• 855713A 3

• 855713A 4

• 114-5713

• 1145713

• 1445713

  

Aftermarket / Verified Equivalents:

  

• CDI Electronics: 114-5713

• Aftermarket switch box replacement: 114-5713

• Aftermarket switch box replacement: 1445713

• Aftermarket direct-fit switch boxes for 855713A3 / 855713A4 applications

  

🚤 Compatibility

  

Commonly used on:

  

• Mercury / Mariner small two-stroke ignition systems

  

Typically suits:

  

• Engine models:

• Mercury 6HP two-stroke 1999-2006 applications using this switch box family

• Mercury 8HP two-stroke 1999-2006 applications using this switch box family

• Mercury 9.9HP two-stroke 1999-2006 applications using this switch box family

• Mercury 10HP two-stroke applications using this switch box family

• Mercury 15HP two-stroke applications using this switch box family

• Mercury 20HP two-stroke 2-cylinder Mercosil block applications using this switch box family

• Mercury 25HP two-stroke 2-cylinder Mercosil block applications using this switch box family

• Mariner 6HP two-stroke applications using this switch box family

• Mariner 8HP two-stroke applications using this switch box family

• Mariner 9.9HP two-stroke applications using this switch box family

• Mariner 10HP two-stroke applications using this switch box family

• Mariner 15HP two-stroke applications using this switch box family

• Mariner 20HP two-stroke applications using this switch box family

• Mariner 25HP two-stroke applications using this switch box family

  

• HP Range: 6HP - 25HP

• Engine Type: Mercury / Mariner 2-cylinder two-stroke outboard

• Year Range: Approximately 1999 - 2006 depending on model

• Serial Note: Commonly associated with 4-magnet flywheel ignition systems. Confirm exact serial number, ignition type and connector layout before installation.

  

🔌 Function

  

The switch box stores ignition energy from the stator and releases it to the ignition coils when triggered, creating spark at the correct timing point.

  

Common signs of failure:

  

• No spark on one or both cylinders

• Intermittent spark when hot

• Engine misfire at RPM

• Hard starting or no-start condition

• Spark returns when switch box is substituted

• Stator and trigger test correctly but spark remains absent

• Water or heat damage to switch box casing

  

📦 Condition

  

• Genuine used part

• Removed from running engine where applicable

• In good working condition unless otherwise stated

## Details

- **Price:** 150.0 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 | 150.00 AUD | In stock |

## Images

- 855714A3 855713A4 Mercury Switch Box | Genuine Used Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/855714a3-855713a4-mercury-switch-box-genuine-used-part)
> Updated: 2026-06-29