• 864273T07 Mercruiser MX6.2L MPI ECU (0W029410 and below) | Genuine Used Part
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864273T07 Mercruiser MX6.2L MPI ECU (0W029410 and below) | Genuine Used Part

864273T07 Mercruiser MX6.2L MPI ECU (0W029410 and below) | Genuine Used Part

$1,400.00 AUD
$1,400.00 AUD
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🔧 Product Description

Genuine MerCruiser MX 6.2L MPI ECM / Engine Control Module - Part Number: 864273T07

A genuine Mercury MerCruiser ECM for selected MX 6.2L MPI Bravo petrol sterndrive engines. This module is used on raw-water cooled / standard cooling MX 6.2L MPI applications up to serial number 0W029410, and manages fuel injection, ignition timing, idle control, diagnostics and engine-protection functions.

⚙️ Key Features

  • Genuine Mercury MerCruiser ECM
  • Correct Mercury part number 864273T07
  • ECM horsepower calibration for 335HP MX 6.2L MPI applications
  • Suits MCM MX 6.2L MPI Bravo standard-cooling engines up to serial 0W029410
  • Requires exact serial-number and cooling-system confirmation before installation

🚤 Compatibility

Commonly used on

  • MerCruiser MCM MX 6.2L MPI Bravo petrol sterndrive engines
  • Standard-cooling / raw-water cooled MX 6.2L MPI electrical-control systems

Typically suits

  • Engine models:
  • MerCruiser MCM MX 6.2L MPI Bravo - 2001-2002, serial 0M300000 to 0M599999
  • MerCruiser MCM MX 6.2L MPI Bravo with standard cooling - 2002-2004, serial 0M600000 to 0W029410
  • MerCruiser MX 6.2L MPI 377 CID V8 applications using ECM 864273T07
  • MerCruiser 5.0L / 350 MAG / MX 6.2L MPI electrical-component family applications where the MX 6.2L MPI standard-cooling diagram specifies 864273T07
  • HP Range: approximately 320HP - 335HP depending on exact MX 6.2L calibration
  • Engine Type: MerCruiser GM-based 377 CID / 6.2L V8 MPI petrol sterndrive
  • Year Range: approximately 2001 - 2004
  • Serial Range: 0M300000 to 0W029410 for listed MX 6.2L MPI Bravo applications
  • Cooling Type: Standard cooling / raw-water cooled applications where 864273T07 is specified

🔌 Function

The ECM is the main engine-management module. It processes crank, cam, MAP, throttle, temperature, knock and other sensor inputs, then controls fuel injection, ignition timing, idle strategy, diagnostics and engine-protection functions.

⚠️ Common Signs of Failure

  • No-start with confirmed fuel pressure, ignition inputs and ECM power supply
  • No communication with diagnostic equipment
  • No injector pulse or no ignition command after harness testing
  • Intermittent stalling, shutdown or limp mode
  • Persistent ECM-related fault codes after sensor replacement
  • Incorrect idle or fuel-control behaviour after mechanical checks
  • Water intrusion, corrosion or voltage-damage related module failure

🔄 Supersession & Cross Reference

OEM Supersession Chain

  • 864273T07 → Supersedes 864273T3
  • 864273T3 earlier ECM reference

OEM / Related Numbers

  • 864273T07
  • 77-864273T07
  • 864273T3
  • Related ECM family reference: 864273T06
  • Related ECM family reference: 866126T05
  • Related ignition / electrical service reference: 8M0054588
  • Related harness reference: 84-863656A1
  • Related spark plug reference: 33-8M2018369

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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