• 855212A1 Mercury Harness Adapter | Genuine Used Part
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855212A1 Mercury Harness Adapter | Genuine Used Part

855212A1 Mercury Harness Adapter | Genuine Used Part

$5.00 AUD
$5.00 AUD
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🔧 Product Description

Genuine Mercury Harness Adapter - Part Number: 855212A1

A genuine Mercury harness adapter used in selected Mercury and Mariner two-stroke carbureted outboard cylinder block / crankcase harness assemblies. This adapter is commonly listed as 84-855212A1 and is used in oil-injection and adaptor harness positions on supported 3-cylinder and 4-cylinder engines.

⚙️ Key Features

  • Genuine Mercury harness adapter
  • Correct Mercury part number 855212A1
  • Also listed as 84-855212A1
  • Used on selected Mercury / Mariner 3-cylinder and 4-cylinder two-stroke carbureted outboards
  • Must be matched by exact serial-numbered parts diagram and harness connector layout

🚤 Compatibility

Commonly used on

  • Mercury / Mariner two-stroke carbureted outboard harness assemblies
  • 3-cylinder 65 Jet / 75HP / 90HP oil-injection harness adaptor positions
  • 4-cylinder 80 Jet / 100HP / 115HP / 125HP harness adaptor positions

Typically suits

  • Mercury 65 Jet - serial 0D283222 to 0G760299
  • Mercury 65 Jet - serial 0G760300 to 0T979999
  • Mercury 65 Jet - serial 0P017000 to 0P325499
  • Mercury 65 Jet - serial 9793577 to 0P016999
  • Mercury 65 Jet 3-cylinder - serial 0T980000 to 0T999999
  • Mercury 65 Jet 3-cylinder - serial 1B000001 and up
  • Mercury 75HP 3-cylinder - serial 0D283222 to 0G760299
  • Mercury 75HP 3-cylinder - serial 0G760300 to 0T979999
  • Mercury 75HP 3-cylinder - serial 0P017000 to 0P325499
  • Mercury 75HP 3-cylinder - serial 0P325500 and up
  • Mercury 75HP 3-cylinder - serial 0T980000 to 0T999999
  • Mercury 75HP 3-cylinder - serial 1B000000 and up
  • Mercury 75HP 3-cylinder - serial 1B000001 and up
  • Mercury 75HP 3-cylinder - serial 9793577 to 0P016999
  • Mercury 80 Jet - serial 0D283222 to 0G760299
  • Mercury 80 Jet - serial 0G760300 to 0T979999
  • Mercury 80 Jet - serial 0P017000 to 0P325499
  • Mercury 80 Jet - serial 9793577 to 0P016999
  • Mercury 80 Jet - serial 0T980000 to 0T999999
  • Mercury 80 Jet - serial 1B000001 and up
  • Mercury 90HP 3-cylinder - serial 0D283222 to 0G760299
  • Mercury 90HP 3-cylinder - serial 0G760300 to 0T979999
  • Mercury 90HP 3-cylinder - serial 0P017000 to 0P325499
  • Mercury 90HP 3-cylinder - serial 0P325500 and up
  • Mercury 90HP 3-cylinder - serial 0T980000 to 0T999999
  • Mercury 90HP 3-cylinder - serial 1B000001 and up
  • Mercury 90HP 3-cylinder - serial 9793577 to 0P016999
  • Mercury 100HP 4-cylinder - serial 0D283222 to 0G760299
  • Mercury 100HP 4-cylinder - serial 0G760300 to 0G965520
  • Mercury 100HP 4-cylinder - serial 0P017000 to 0P058999
  • Mercury 100HP 4-cylinder - serial 9793577 to 0P016999
  • Mercury 115HP 4-cylinder - serial 0D283222 to 0G760299
  • Mercury 115HP 4-cylinder - serial 0G760300 to 0T979999
  • Mercury 115HP 4-cylinder - serial 0P017000 to 0P325499
  • Mercury 115HP 4-cylinder - serial 9793577 to 0P016999
  • Mercury 115HP 4-cylinder - serial 0P325500 and up
  • Mercury 115HP 4-cylinder - serial 0T980000 to 0T999999
  • Mercury 115HP 4-cylinder - serial 1B000001 and up
  • Mercury 125HP 4-cylinder - serial 0D283222 to 0G760299
  • Mercury 125HP 4-cylinder - serial 0G760300 to 0T979999
  • Mercury 125HP 4-cylinder - serial 0P017000 to 0P325499
  • Mercury 125HP 4-cylinder - serial 9793577 to 0P016999
  • Mercury 125HP 4-cylinder - serial 0P325500 and up
  • Mercury 125HP 4-cylinder - serial 0T980000 to 0T999999
  • Mercury 125HP 4-cylinder - serial 1B000001 and up
  • HP Range: 65 Jet / 75HP / 80 Jet / 90HP / 100HP / 115HP / 125HP
  • Engine Type: Mercury / Mariner two-stroke carbureted 3-cylinder and 4-cylinder outboard
  • Year Range: Serial-number controlled
  • Serial Note: Confirm the engine serial number, oil-injection configuration and harness plug layout before installation.

🔌 Function

The harness adapter connects the specified engine wiring circuit into the cylinder block / crankcase harness assembly, allowing the correct oil-injection or adaptor harness connection on supported Mercury and Mariner outboards.

⚠️ Common Signs of Failure

  • Damaged or broken harness connector
  • Corroded terminals
  • Oil-injection warning or related harness fault
  • Intermittent electrical connection
  • Harness plug does not lock securely
  • Broken wire at adapter body
  • Electrical fault changes when the harness is moved

🔄 Supersession & Cross Reference

OEM Supersession Chain

  • 855212A1 current Mercury harness adapter reference

OEM / Related Numbers

  • 855212A1
  • 84-855212A1
  • 855212-A1
  • 855212
  • Harness adapter
  • Harness assembly adapter
  • Oil injection harness adapter
  • UPC: 745061434868

Aftermarket / Verified Equivalents

  • No aftermarket equivalent

📦 Condition

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

Shipping & Delivery

Flat-rate shipping Australia-wide — $14.99 per order, no matter how many parts you add. Orders dispatch from our Kadina, South Australia store. Need it urgently or want to collect in person? Call us on 0412 532 984 before ordering.

Returns & Warranty

14-day change-of-mind returns — if it's not right or you ordered the wrong part, send it back within 14 days in the condition you received it for a refund or exchange. Full details in our Refunds & Returns policy.

Not sure this fits?

Ask us before you buy — we check part numbers and fitment every day. Call 0412 532 984 (Mon–Fri 8.30am–4.30pm) or message us through the contact page with your engine or vehicle details.

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