Volvo Penta Sealing Ring 1546221

Volvo Penta Sealing Ring Part No. 1546221

This is the genuine OEM Volvo Penta sealing ring for compatible Volvo Penta marine engine and drive applications. Manufactured to factory specifications from marine-grade elastomer, this O-ring seals engine and drivetrain joints against oil, coolant, and fuel leaks maintaining system integrity under the temperature cycling and vibration demands of marine operation.

If your Volvo Penta service manual or parts diagram specifies 1546221, this is the correct seal.

Product Details

• Part Number: 1546221
• Brand: Volvo Penta (OEM)
• Official Product Type: Sealing Ring / O-Ring
• Material: Marine-grade elastomer resistant to oil, fuel, and coolant
• System: Engine and drivetrain sealing application-specific; confirm via service manual
• Supersedes: Confirm via Volvo Penta serial-number lookup
• Replaced By: Confirm via current Volvo Penta parts catalog

Compatible Applications

Use only where Volvo Penta part number 1546221 is specified. Compatibility is determined by engine model, assembly location, and serial number range. Always verify against your Volvo Penta service manual or parts diagram before ordering.

• Volvo Penta marine gasoline and diesel engines where this sealing ring is specified
• Engine oil, coolant, or fuel system sealing joints calling for part 1546221
• Drivetrain or housing assemblies where this O-ring is listed in the parts diagram
• Replacement during any service where the original seal is disturbed or removed

When This Part Needs Replacement

Replace this sealing ring whenever:

• The sealed joint is disassembled for any reason O-rings should not be reused once removed
• An oil, coolant, or fuel leak is traced to the sealed location
• The ring is found cracked, hardened, flattened, or deformed during inspection
• An engine or drive service requires disassembly of the component it seals

Installation Notes

• Clean the O-ring groove and mating surfaces thoroughly before installation
• Inspect the groove for damage, corrosion, or debris that could compromise the seal
• Lubricate the O-ring with clean engine oil or the lubricant specified in the service manual before fitting
• Do not twist or pinch the ring during installation seat it evenly in the groove
• Never reuse a removed O-ring always fit a new seal at reassembly
• Follow Volvo Penta torque specifications for the fasteners on the sealed assembly

Related Parts

• Volvo Penta Engine Gasket 1545779
• Volvo Penta Black RTV Silicone Sealant 1161277
• Volvo Penta O-Ring 125362
• Volvo Penta O-Ring 925053
• Volvo Penta Sealing Ring 873094
• Volvo Penta Gasket Kit 876266
• Volvo Penta Gasket Kit 3863191

Technical FAQ

Can I reuse this O-ring after removing it?
No. Once an O-ring has been compressed and removed, it cannot reliably seal again. Always fit a new seal whenever the joint is opened, regardless of how the original looks.

Do I need to lubricate the O-ring before installation?
Yes lightly lubricating the O-ring with clean engine oil or the lubricant specified in the service manual helps it seat correctly and prevents tearing during assembly. Do not use petroleum-based grease on rubber seals unless the service manual specifies it.

How do I confirm this is the right seal for my engine?
Cross-reference your engine model and serial number in the Volvo Penta parts catalog. Sealing rings are listed by assembly location and serial number range not by engine name alone. The part number in the diagram is the safest reference.

What causes O-rings to fail prematurely?
Heat cycling, chemical incompatibility, incorrect installation (twisting or pinching), and groove damage are the most common causes. Using the correct OEM seal for the application ensures material compatibility with Volvo Penta fluids and operating temperatures.

Parts Desk Insights

Best use case: This sealing ring is the right choice any time the joint it seals is opened during service. At $79, it is inexpensive insurance against a repeat teardown or a fluid leak after reassembly always include it in the parts order when the surrounding assembly is being serviced.

Common customer questions: The most frequent question is whether the original O-ring can be reused if it looks fine it cannot. Compression set and micro-cracking are not always visible, and a failed seal after reassembly costs far more in labour than the cost of a new ring. Customers also ask about aftermarket substitutes OEM is always the safest choice for material compatibility with Volvo Penta fluids and operating conditions.