21609861 Flexible Coupling | Genuine Volvo Penta Part

🔧 Product Description

Torsional flexible coupling for the Volvo Penta MGX-5065-A marine gear installation. It connects the engine/flywheel drive to the gearbox while damping torsional vibration and accommodating small alignment movements.

🚤 Compatibility

Typically suits:

• Volvo Penta D13C2-B MP
• Volvo Penta D13C1-A MP
• Volvo Penta D13C2-A MP
• Volvo Penta D13C3-A MP
• Volvo Penta D13C4-A MP
• Volvo Penta D13B-A MP
• Volvo Penta D13B-H MP
• Volvo Penta D13B-B MP
• Volvo Penta D13B-D MP
• Volvo Penta D13B-C MP
• Volvo Penta D13C4-B MP
• Volvo Penta D13C5-A MP
• Volvo Penta D13C7-B MP
• Volvo Penta D13C8-B MP

• Engine Family: D

⚙️ Key Features

• Genuine Volvo Penta flexible coupling
• Specific to MGX-5065-A marine gear installation
• Damps driveline torsional vibration
• Factory bolt pattern, hub and clutch-flange interface
• Alignment and fastener torque must be checked during installation
• Engine type: Volvo Penta marine propulsion driveline

🔌 Function

Transfers engine torque to the marine gear while isolating torsional pulses and minor relative movement.

⚠️ Common Signs of Failure

• Knocking or rattling at idle/load changes
• Rubber element cracking or separation
• Excess driveline vibration
• Loose bolts or fretting at the flange
• Loss of drive if the coupling element fails

🛠️ Service Notes

• Check and set the alignment of the engine and drive before and after fitting a flexible coupling — it absorbs vibration and a small amount of misalignment, it does not correct a driveline that is out of line
• Handle the rubber elements carefully and keep them clear of oil, fuel and solvents, which soften and swell rubber and shorten its life dramatically
• Fit the coupling as a complete unit, use new locking hardware wherever the workshop manual for your engine specifies it, and tighten the fasteners to the figures in that manual
• Turn the driveline over by hand after assembly and check that it runs true, with no binding and no excessive free play
• Inspect the coupling whenever the drive is separated for any other reason; the rubber is the part that ages, and planned replacement is far cheaper than a failure at sea

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 21575444 related flexible coupling
• 21575446 hub
• 844765 clutch flange

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging