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8M0123821 Mercury Coil 2&3 | Genuine Used Part

8M0123821 Mercury Coil 2&3 | Genuine Used Part

$225.00 AUD
$225.00 AUD
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🔧 Product Description

Genuine Mercury Ignition Coil - Part Number: 8M0123821

A genuine Mercury ignition coil used on selected Yamaha-based Mercury / Mariner four-stroke outboards. This coil is commonly identified as the coil for cylinders 2 and 3 in compatible 115HP four-stroke ignition systems and is part of the 880893T10 / 8M0123821 supersession family.

⚙️ Key Features

  • Genuine Mercury ignition coil
  • Correct Mercury part number 8M0123821
  • Replaces earlier 880893T10 ignition coil reference
  • Commonly used for cylinder 2 and cylinder 3 positions
  • Cross-references with Yamaha 68V / 69J ignition coil family

🚤 Compatibility

Commonly used on

  • Mercury / Mariner Yamaha-based four-stroke ignition systems

Typically suits

  • Engine models:
  • Mercury 115 EFI FourStroke - 2001
  • Mercury 115 EFI FourStroke - 2002
  • Mercury 115 EFI FourStroke - 2003
  • Mercury 115 EFI FourStroke - 2004
  • Mercury 115 EFI FourStroke - 2005
  • Mercury 115 EFI FourStroke - 2006
  • Mercury 225HP 4-stroke EFI applications using shared Yamaha-based coil family
  • Yamaha F115 / LF115 ignition systems using 68V coil family
  • Yamaha F200 / F225 4-stroke ignition systems using related 68V / 69J coil family
  • HP Range: commonly 115HP - 225HP shared Mercury / Yamaha four-stroke coil family
  • Engine Type: Mercury / Yamaha-based EFI four-stroke outboard
  • Year Range: approximately 2001 - 2006 for core Mercury 115 EFI FourStroke applications, with broader Yamaha-family use through 2015 where specified
  • Serial Note: Match by cylinder position, coil number, engine serial number and connector style.

🔌 Function

The ignition coil converts ECU-triggered low-voltage input into high-voltage spark output for the assigned cylinders.

⚠️ Common Signs of Failure

  • Misfire on cylinder 2 or 3
  • Weak or no spark
  • Engine runs rough under load
  • Coil fault follows when swapped between cylinders
  • Hard starting after plug replacement
  • ECU ignition fault code
  • Cracked, swollen or corroded coil body

🔄 Supersession & Cross Reference

OEM Supersession Chain

  • 8M0123821 → Supersedes 880893T10
  • 880893T10 earlier Mercury ignition coil reference

OEM / Related Numbers

  • 8M0123821
  • 339-8M0123821
  • 880893T10
  • 339-880893T10
  • 888309 related coil reference
  • Yamaha: 68V-82310-00-00
  • Yamaha: 68V-82310-01-00
  • Yamaha: 69J-82310-00-00

Aftermarket / Verified Equivalents

  • WSM: 380-5122
  • Aftermarket Mercury / Yamaha coil replacements for 880893T10
  • Aftermarket Yamaha / Mercury F115 / F200 / F225 coil replacements

📦 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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