861523A11 Mercruiser Engine Coupler | Genuine Used Part

🔧 Product Description

Genuine MerCruiser Heavy-Duty Steel-Hub Bravo Engine Coupler - Part Number: 861523A11

A genuine used heavy-duty engine coupler for selected MerCruiser V6 and V8 petrol engines connected to Bravo sterndrives.

The 861523A11 coupler uses steel splines for low-speed, commercial and work-duty applications and accepts either metric or SAE mounting hardware. It bolts to the flywheel and transfers engine torque to the Bravo input shaft through a rubber-isolated centre hub.

⚙️ Key Features

• Genuine MerCruiser heavy-duty Bravo coupler
• Correct Mercury reference 861523A11
• Steel-splined hub for work and low-speed applications
• Compatible with metric or SAE mounting screws
• Suits selected MerCruiser V6 and V8 Bravo packages

🚤 Compatibility

Commonly used on

• MerCruiser Bravo One, Bravo Two and Bravo Three sterndrive packages
• Commercial, workboat and sustained low-speed engine installations
• V6 and V8 petrol engines requiring the steel-hub coupler

Typically suits

• Engine models:
• MerCruiser 4.3L V6 Bravo applications specifying 861523A11
• MerCruiser 5.0L V8 Bravo
• MerCruiser 5.7L V8 Bravo
• MerCruiser 350 MAG Bravo
• MerCruiser 6.2L MPI Bravo
• MerCruiser 377 MAG Bravo
• MerCruiser 7.4L / 454 CID Bravo
• MerCruiser 8.1L and 8.2L Bravo applications specifying the steel-hub coupling
• Jackshaft and commercial applications only when the factory diagram lists 861523A11
• HP Range: Engine-output dependent
• Engine Type: MerCruiser V6 and V8 petrol marine engine
• Year Range: Model, serial number and duty specification controlled

🔌 Function

The coupler transfers flywheel rotation to the Bravo input shaft while reducing torsional vibration, shock loading and driveline resonance.

⚠️ Common Signs of Failure

• Engine runs but the sterndrive does not propel the boat
• Steel splines are worn, fretted or stripped
• Burning-rubber smell near the flywheel housing
• Rubber separates from the centre hub
• Excessive rotational free play
• Vibration or knocking from the rear of the engine
• Grease cannot reach the spline area
• Repeated failure caused by incorrect engine alignment

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 861523A11 → Supersedes 861523A1
• 861523A1 earlier heavy-duty Bravo coupling reference

OEM / Related Numbers

• 861523A11
• 861523A 11
• 861523A1
• Standard aluminium-hub Bravo coupler: 861523A9
• Standard coupler reference: 861523A7
• Standard coupler aftermarket reference: Mallory 9-72503
• Coupler grease fittings: 22-49099
• Mounting screws: 10-863480
• Mounting washers: 12-20572

Aftermarket / Verified Equivalents

• No direct aftermarket equivalent for the heavy-duty steel-hub 861523A11

📦 Condition

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