• 858723T1 Mercury Harness | Genuine Used Part
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858723T1 Mercury Harness | Genuine Used Part

858723T1 Mercury Harness | Genuine Used Part

$25.00 AUD
$25.00 AUD
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🔧 Product Description

Genuine Mercury Harness Assembly - Part Number: 84-858723T1

A genuine Mercury harness assembly used on selected Mercury 75HP to 115HP four-stroke and EFI four-stroke outboards. This harness must be matched by exact serial range and connector layout before installation.

⚙️ Key Features

  • Genuine Mercury harness assembly
  • Correct OEM part number 84-858723T1
  • Used on Mercury 75HP to 115HP four-stroke outboards
  • Supports EFI and non-EFI four-stroke electrical layouts
  • Must be matched by serial-numbered parts diagram

🚤 Compatibility

Commonly used on

  • Mercury 75HP / 90HP four-stroke outboards
  • Mercury 75 EFI / 80 EFI / 90 EFI / 100 EFI / 115 EFI four-stroke outboards

Typically suits

  • Mercury 75HP 4-Stroke - serial 0G960500 to 0T800999
  • Mercury 75HP 4-Stroke - serial 0T801000 to 1B226999
  • Mercury 75HP 4-Stroke Bodensee - serial 0G960500 to 0T800999
  • Mercury 75HP 4-Stroke Bodensee - serial 0T801000 to 1B226999
  • Mercury 75 EFI 4-Stroke - serial 1B172291 to 1B366822
  • Mercury 80 EFI 4-Stroke - serial 1B227000 to 1B366822
  • Mercury 90HP 4-Stroke - serial 0G960500 to 0T800999
  • Mercury 90HP 4-Stroke - serial 0T801000 to 1B226999
  • Mercury 90 EFI 4-Stroke - serial 1B172291 to 1B366822
  • Mercury 100 EFI 4-Stroke - serial 1B227000 to 1B366822
  • Mercury 115 EFI 4-Stroke - serial 0T178500 to 0T800999
  • Mercury 115 EFI 4-Stroke - serial 0T801000 to 1B226999
  • Mercury 115 EFI 4-Stroke - serial 1B227000 to 1B366822
  • HP Range: 75HP / 80HP / 90HP / 100HP / 115HP
  • Engine Type: Mercury four-stroke and EFI four-stroke outboard
  • Year Range: Serial-number controlled
  • Serial Note: Confirm serial number and harness plug layout before installation.

🔌 Function

The harness assembly carries engine electrical power and signal circuits between sensors, control components, relays and engine wiring junctions.

⚠️ Common Signs of Failure

  • Intermittent no-start or cut-out
  • EFI or sensor faults caused by damaged wiring
  • Corroded plug terminals
  • Broken locking tabs
  • Warning horn or gauge faults
  • Fault changes when harness is moved
  • Damaged insulation or previous repair joins

🔄 Supersession & Cross Reference

OEM Supersession Chain

  • 84-858723T1 current Mercury harness reference

OEM / Related Numbers

  • 858723T1
  • 84-858723T1
  • 858723-T1
  • Harness assembly
  • UPC: 745061443099

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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