21485410 Flexible Coupling | Genuine Volvo Penta Part

🔧 Product Description

A torsionally flexible coupling installed between the engine flywheel and marine transmission on Volvo Penta D3-G inboard propulsion packages.

🚤 Compatibility

• Engine Family: D
• HP Range: 110-220 HP

Full model list at the end of this description.

⚙️ Key Features

• Absorbs driveline torsional vibration
• Bolts to the designated flywheel
• Maintains engine-to-transmission alignment
• Reduces shock loading
• Designed for the D3 flywheel and bellhousing arrangement
• Also supersedes Volvo part numbers 3819449, 3848851 and 3883232

🔌 Function

The coupling transfers engine torque to the transmission while damping combustion pulses and driveline shock.

⚠️ Common Signs of Failure

• Rattling at idle
• Rubber or flexible element cracking
• Excessive rotational play
• Metallic debris around the bellhousing
• Loss of drive after coupling failure

🛠️ 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 Supersession Chain

• 21485410 → Supersedes 21321662

OEM / Related Numbers

• 21416069 earlier number superseded by this part
• 21517500 - Related flywheel
• 21517489 - Related ring gear

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D3-110I-C, D3-130I-C, D3-220I-G, D3-140I-F, D3-140I-G, D3-110I-F, D3-150I-F, D3-170I-F, D3-200I-F, D3-220I-F, D3-110I-G, D3-150I-G, D3-170I-G, D3-200I-G, D3-110I-H, D3-160I-C, D3-190I-C, D3-150I-H, D3-170I-H, D3-200I-H, D3-220I-H, D3-140I-H