Sierra 18-2541 O-Ring Rubber Seal, Replaces OEM 911704 and 984461

The Sierra 18-2541 is a rubber O-ring seal engineered as a direct replacement for original equipment engine components. Molded from black rubber, it is built to meet or exceed the specifications of the original equipment part it replaces, providing a reliable seal against water and fluid intrusion in the engine application it serves. Its compact size and light weight of 0.01 pounds reflect its role as a precision internal sealing component rather than a structural part.

Each unit is a single O-ring, sold individually, and is intended as a like-for-like replacement for an original equipment seal bearing the OEM number 911704. It is commonly stocked alongside other OMC internal engine parts and is used when servicing or rebuilding engine assemblies that call for this exact seal. Because it directly replaces the original equipment number, it drops into the same location without modification.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2541
• Product Type: O-Ring / Rubber Seal
• Material: Rubber
• Color: Black
• Weight: 0.01 pounds
• OEM Cross-Reference: 911704
• Replaces: 984461
• UPC: 030999752833

Replaces (OEM)

• 911704
• 984461

Frequently Asked Questions

What is the Sierra 18-2541? The Sierra 18-2541 is a black rubber O-ring seal used as a direct replacement engine sealing component, sold as a single individual unit.

What OEM part numbers does the 18-2541 replace? It replaces OEM numbers 911704 and 984461, so either of those original equipment numbers can be cross-referenced to the Sierra 18-2541.

What material is the 18-2541 seal made from? It is made from black rubber, a material chosen for its flexibility and resistance to fluid exposure in engine sealing applications.

How much does the 18-2541 O-ring weigh? The Sierra 18-2541 weighs 0.01 pounds, consistent with its role as a small internal sealing component rather than a structural part.

Is the 18-2541 an aftermarket or genuine OEM part? The 18-2541 is an aftermarket replacement seal built to meet or exceed the specifications of the original equipment part it replaces, identified by OEM numbers 911704 and 984461.

How many O-rings come in one 18-2541 package? One Sierra 18-2541 rubber seal is included per unit; quantity needed depends on how many seals the specific engine service calls for.

Can the 18-2541 be used to service OMC internal engine components? Yes, the 18-2541 is categorized as an OMC internal engine part and is intended for use when servicing engine assemblies that require this seal.

Does the Sierra 18-2541 come in any color other than black? No, the Sierra 18-2541 rubber seal is produced in black only.

Is installation of the 18-2541 seal straightforward? As a direct-replacement O-ring for OEM numbers 911704 and 984461, the 18-2541 installs in the same location as the original seal without modification.

What is the difference between the 18-2541 and the original OEM seal? Functionally, the 18-2541 is designed to meet or exceed the original equipment seal's specifications; the difference is that it is sold under the Sierra brand rather than the original OEM part number.