850043A2 Mercury Harness | Genuine Used Part

🔧 Product Description

Genuine Mercury Engine Harness - Part Number: 850043A2

A genuine Mercury engine wiring harness used on Mercury and Mariner 3-cylinder and 4-cylinder two-stroke outboards. This harness connects key electrical components in the engine electrical system and is commonly used on 65 Jet, 75HP, 90HP, 80 Jet, 100HP, 115HP and 125HP carbureted two-stroke models.

⚙️ Key Features

• Genuine Mercury engine harness
• Correct Mercury part number 850043A2
• Also listed under Mercury 84-850043A2 harness format
• Used on Mercury / Mariner 3-cylinder and 4-cylinder two-stroke outboards
• Cross-references with CDI and Sierra replacement harness references

🚤 Compatibility

Commonly used on

• Mercury / Mariner 3-cylinder two-stroke electrical systems
• Mercury / Mariner 4-cylinder two-stroke electrical systems

Typically suits

• Engine models:
• Mercury / Mariner 65 Jet 3-cylinder - USA serial 0G438000 and up / Belgium serial 9937000 and up
• Mercury / Mariner 75HP 3-cylinder - approximately 1996-2006
• Mercury / Mariner 90HP 3-cylinder - serial 9793577 through 0P016999
• Mercury / Mariner 90HP 3-cylinder - USA serial 0G438000 and up / Belgium serial 9937000 and up
• Mercury / Mariner 80 Jet 4-cylinder - approximately 1994-2006
• Mercury / Mariner 80 Jet 4-cylinder - serial 0G760300 through 0T979999
• Mercury / Mariner 80 Jet 4-cylinder - serial 1B000001 and up
• Mercury / Mariner 100HP 4-cylinder - approximately 1994-2006
• Mercury / Mariner 115HP 4-cylinder - approximately 1994-2006
• Mercury / Mariner 125HP 4-cylinder - serial 0D283222 through 0G760299
• Mercury / Mariner 125HP 4-cylinder electrical components using harness 850043A2
• HP Range: commonly 65 Jet / 75HP - 125HP
• Engine Type: Mercury / Mariner 3-cylinder and 4-cylinder carbureted two-stroke outboard
• Year Range: approximately 1994-2006 depending on model and serial range

🔌 Function

The engine harness connects electrical components such as ignition, charging, fuse, warning and engine-control circuits so the outboard electrical system can operate as designed.

⚠️ Common Signs of Failure

• Intermittent ignition or charging faults
• Melted, brittle or cracked wiring insulation
• Corroded pins or loose connectors
• Electrical faults after engine vibration or movement
• Blown fuse caused by harness short
• No-start or accessory failure caused by broken harness continuity

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 84-850043A2 Mercury engine harness service format
• 850043A2 Mercury engine harness reference

OEM / Related Numbers

• 850043A2
• 84-850043A2
• 850043A 2
• 84-850043A 2

Aftermarket / Verified Equivalents

• CDI Electronics: 414-0043
• Sierra: 18-99454
• Sierra / CDI reference: 414-0043

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated