21931952 Flexible Coupling | Genuine Volvo Penta Part

🔧 Product Description

Load-transmitting or actuation assembly engineered for the specified Volvo Penta propulsion or cooling-drive system. Correct spline, ratio, mounting and serial application are essential.

🚤 Compatibility

Typically suits:

• Volvo Penta D11C2-A MP
• Volvo Penta D11C4-A MP
• Volvo Penta D11B4-A MP
• Volvo Penta D11B2-A MP
• Volvo Penta D11A-C MP
• Volvo Penta D11A-D MP
• Volvo Penta D11A-E MP
• Volvo Penta D8A4-A MP
• Volvo Penta IPS2-A
• Volvo Penta IPS2-B
• Volvo Penta IPS20-E

• Engine Family: D, IPS

⚙️ Key Features

• Factory torque and alignment specification
• Designed for the original shaft or actuator geometry
• Marine-duty materials
• Related bearings, seals and fasteners must be inspected

🔌 Function

Absorbs torsional vibration and minor alignment movement while transmitting engine torque to the IPS driveline.

⚠️ Common Signs of Failure

• Torsional vibration
• Cracked or separated flexible element
• Abnormal driveline noise
• Fretting at bolts or flange
• Loss of torque transmission

🛠️ 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

• 21931952 → Supersedes 3593770

OEM / Related Numbers

• 3593770 earlier number superseded by this part

Other-Brand OEM Numbers

• VOE21931952

Aftermarket / Verified Equivalents

• Propeller shaft: 3889354
• Extension kit: 3594632
• Related flexible coupling: 3593770
• Wiring harness: 21493370

📦 Condition

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