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8M0115149 861229-C Mercruiser Exhaust Bullhorn | Genuine Used Part

8M0115149 861229-C Mercruiser Exhaust Bullhorn | Genuine Used Part

$500.00 AUD
$500.00 AUD
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🔧 Product Description

Genuine MerCruiser Exhaust Y-Pipe / Bullhorn Assembly - Part Number: 8M0115149

A genuine MerCruiser transom exhaust Y-pipe, commonly called an exhaust bullhorn, for selected V6 and V8 Alpha and Bravo sterndrive installations.

The assembly collects exhaust from the port and starboard exhaust hoses and directs it through the transom assembly and sterndrive. Current service number 8M0115149 replaces several earlier MerCruiser Y-pipe assemblies, while 861229-C is a casting or engineering number found on the housing.

⚙️ Key Features

  • Genuine Mercury MerCruiser exhaust Y-pipe
  • Correct current service part number 8M0115149
  • Casting reference 861229-C
  • Dual upper inlets with central transom exhaust outlet
  • Used with selected Alpha and Bravo V6/V8 sterndrive packages

🚤 Compatibility

Commonly used on

  • MerCruiser Alpha One Gen II installations
  • MerCruiser Bravo One, Bravo Two and Bravo Three installations
  • V6 and V8 petrol sterndrive exhaust systems with oval upper outlets

Typically suits

  • Engine families:
  • MerCruiser 4.3L V6
  • MerCruiser 4.5L V6
  • MerCruiser 5.0L V8
  • MerCruiser 5.7L / 350 CID V8
  • MerCruiser 6.2L V8
  • MerCruiser 350 MAG MPI
  • MerCruiser 383 MAG Stroker MPI
  • Selected 7.4L and 8.2L V8 installations using the same Y-pipe specification
  • Drive Types:
  • Alpha One Gen II
  • Bravo One
  • Bravo Two
  • Bravo Three
  • Engine Type: MerCruiser V6 or V8 petrol sterndrive
  • Year Range: Dependent on engine and transom-assembly serial number

🔌 Function

The bullhorn combines exhaust from both sides of the engine and directs it through the transom assembly and sterndrive while allowing the exhaust shutters to restrict reverse water flow.

⚠️ Common Signs of Failure

  • Internal corrosion or perforation
  • Exhaust or cooling-water leakage into the bilge
  • Cracked upper hose outlets
  • Failed or missing water shutters
  • Corroded transom mounting flange
  • Exhaust noise or fumes within the engine compartment

🔄 Supersession & Cross Reference

OEM Supersession Chain

  • 8M0115149 → Supersedes 8M0054773
  • 8M0054773 → Replaces earlier 807130A4 and 44266T-series assemblies
  • 807130A4 related earlier Y-pipe assembly
  • 44266T1 earlier service reference
  • 44266T earlier service reference
  • 861229-C casting or engineering number

OEM / Related Numbers

  • 8M0115149
  • 8M0054773
  • 807130A4
  • 44266T1
  • 44266T
  • 815786
  • 44265
  • 44265-C1
  • 861229-C
  • 807166A1 related exhaust-water shutter kit
  • 27-862356 related exhaust-pipe gasket
  • 25-8M0204688 related sealing grommet
  • 8M0110820 related factory Y-pipe configuration

Aftermarket / Verified Equivalents

  • No verified branded complete aftermarket equivalent for 8M0115149
  • Replacement exhaust shutters, seals and gaskets are available separately
  • Used or remanufactured Y-pipes must retain the correct oval outlet and transom mounting pattern

📦 Condition

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