21509619 Roller Kit | Genuine Volvo Penta Part

🔧 Product Description

A genuine elastomer roller set used in the flexible coupling on selected D11 marine propulsion reversing-gear installations. The set renews the compliant drive elements that isolate crankshaft torsional pulses from the gearbox.

🚤 Compatibility

• Engine Family: D
• Year Range: approximately late 2000s-2010s

Full model list at the end of this description.

⚙️ Key Features

• Matched OEM roller set
• For D11A-A marine propulsion coupling assemblies
• Maintains correct coupling stiffness and alignment
• Replace the complete installed set

📋 Kit Contents

• Kit includes 6 pcs rubber rollers

🔌 Function

The rollers transmit torque through the flexible coupling while cushioning firing pulses, gear engagement shock and small alignment changes.

⚠️ Common Signs of Failure

• Rubber is cracked, flattened, oil-softened or missing
• Coupling knocks or rattles at idle
• Vibration increases during gear engagement
• Roller debris is found in the coupling housing
• Excessive coupling backlash develops

🛠️ Service Notes

• Fit the kit complete and keep the rollers as a matched set — mixing new rollers with old ones, or running them on a worn track or seat, loads them unevenly and shortens their life sharply
• Work clean: rolling elements are ruined by grit, so wash the parts in clean solvent, dry them without fibrous rag, and keep the assembly covered while you work
• Inspect the surfaces the rollers run on for scoring, pitting and flat spots before fitting; a marked track will destroy a new set
• Pre-lubricate the rollers on assembly with the grease or oil grade specified in the workshop manual for your engine rather than relying on the first run to reach them
• Turn the assembly through by hand once built up and feel for roughness, drag or tight spots before it goes back into service

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 3848150 - related reversing gears
• 3848151 - related reversing gears
• 3848152 - related reversing gears
• 21532583 - related flexible coupling

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D12C-A MP, D12D-A MG, D12D-A MH, D12D-A MP, D12D-B MH, D12D-B MP, D12D-C MH, D12D-C MP, D12D-D MP, D12D-E MP, D12D-F MP, D12D-G MP, D12D-H MP
• Volvo Penta D11B3-A MP, D11A-A, D11A-B, D11A-C, D11A-E, D11A-C MP, D11A-D MP, D11A-C (IPS), D11B1-A MP