8M0138839 Plate Transom Assembly | Genuine Used Part

🔧 Product Description

Genuine MerCruiser Inner Transom Plate Assembly - Part Number: 8M0138839

A genuine used MerCruiser inner transom plate assembly for Alpha One Gen II, Bravo and selected earlier transom systems.

The plate mounts inside the hull and clamps the outer transom assembly securely to the boat. It also provides mounting points for steering and rear engine-support components.

⚙️ Key Features

• Genuine Mercury MerCruiser OEM inner transom plate
• Correct current part number 8M0138839
• Supersedes a long family of earlier transom-plate assemblies
• Used with four-cylinder, V6 and V8 petrol installations
• Includes the current plate configuration and associated pivot hardware where supplied

🚤 Compatibility

Commonly used on

• MerCruiser Alpha One Gen II and Bravo transom assemblies
• Selected R / MR / Alpha One and Blackhawk service applications

Typically suits

• Engine models:
• Alpha One Gen II - 1991-1995, serial 0D469859 to 0F679999
• Alpha One Gen II - 1996-1997, serial 0F680000 to 0K999999
• Alpha One Gen II - 1998 and later, serial 0L100040 and above
• R / MR / Alpha One - 1983-1990 service applications, sterndrive serial 6225577 to 0F386995
• R / MR / Alpha One transom assembly - serial 6216687 to 0F386995
• MerCruiser Blackhawk 1994-1995
• Bravo transom assemblies using the common inner-plate design
• HP Range: Engine-family controlled
• Engine Type: MerCruiser Alpha / Bravo sterndrive transom system
• Year Range: Approximately 1983 onward

🔌 Function

The inner plate spreads clamping and steering loads across the inside of the transom and secures the outer gimbal housing to the hull. It also provides structural mounting locations for steering and engine support.

⚠️ Common Signs of Failure

• Plate is cracked, bent or corroded
• Mounting studs or threads are damaged
• Transom cannot be clamped evenly
• Steering-cylinder mounts have excess play
• Water intrusion has damaged the plate or surrounding transom

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 8M0138839 → Supersedes 8M0114816 and 8M0095951
• 8M0095951 / 8M0114816 → Replace 44117A12, 44117A8, 44117A5 and 44117A3
• 94987A2 and 42261A2 earlier related plate assemblies

OEM / Related Numbers

• 8M0138839
• 8M0114816
• 8M0095951
• 44117A12
• 44117A8
• 44117A5
• 44117A3
• 94987A2
• 42261A2
• 44116 casting family

Aftermarket / Verified Equivalents

• No aftermarket equivalent

📦 Condition

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