21575444 Flexible Coupling | Genuine Volvo Penta Part

🔧 Product Description

High-torque flexible coupling used between Volvo Penta D13 marine engines and Twin Disc MGX-5096A transmission installations. It transmits engine torque while damping torsional pulses and minor alignment variation.

🚤 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

• Exact D13C and MGX-5096A applications
• High-torque resilient coupling
• Works with hub 21575446 and adapter 21588209
• Reduces driveline shock
• Serial- and gearbox-specific
• Engine type: 12.8-litre inline-six turbocharged marine diesel

🔌 Function

Transfers torque from the engine flywheel to the gearbox while isolating torsional vibration and engagement shock.

⚠️ Common Signs of Failure

• Rattling or clunking at idle
• Excessive driveline vibration
• Cracked or displaced resilient elements
• Fretting around bolts or hub
• Loss of drive or excessive free play

🛠️ 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

Other-Brand OEM Numbers

• VOE21575444

Aftermarket / Verified Equivalents

• Associated hub: 21575446
• Associated adapter: 21588209
• Associated mounting screw: 981744

📦 Condition

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