Sierra 18-7141-9 O-Ring, Replaces 25-F40342, Pack of 5

The Sierra 18-7141-9 O-Ring is a rubber sealing O-ring sold in a pack of 5, designed as a direct cross-reference replacement for OEM number 25-F40342. It is listed under Sierra's Volvo Penta Sterndrive Parts category, making it suited for sterndrive service and maintenance work where this seal size is required. The O-ring is molded in black rubber for reliable sealing performance in marine drive applications.

Selling this O-ring in a pack of 5 lets boat owners and technicians keep spares on hand for routine maintenance, drive rebuilds, or multi-point service jobs without having to reorder a single piece at a time. Because it is a direct OEM cross-reference part, it is intended to install in the same location and perform the same sealing function as the original 25-F40342 O-ring it replaces.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-7141-9
• Product Type: O-Ring
• Material: Rubber
• Color: Black
• Pack Quantity: 5
• Weight: 0.01 pounds
• UPC: 808282165208
• OEM Cross Reference: 25-F40342
• Category: Volvo Penta Sterndrive Parts

Fitment

Listed for Volvo Penta sterndrive applications.

Replaces (OEM)

• 25-F40342

Frequently Asked Questions

What does the Sierra 18-7141-9 O-Ring replace? It cross-references to OEM part number 25-F40342, so it is intended to be used as a direct replacement for that seal.

How many O-rings come in this package? The 18-7141-9 is sold as a pack of 5 O-rings, letting you keep spares on hand for future service.

What is the 18-7141-9 O-Ring made of? It is made of black rubber, a standard material choice for sealing O-rings in marine drive applications.

What application is this O-ring designed for? Sierra lists the 18-7141-9 O-Ring under its Volvo Penta Sterndrive Parts category.

Is this a genuine Sierra part or an aftermarket copy? The 18-7141-9 is a Sierra-branded part manufactured to cross-reference the original 25-F40342 O-ring.

What is the UPC for this product? The Sierra 18-7141-9 O-Ring 5-pack carries UPC 808282165208.

How much does the 18-7141-9 O-Ring pack weigh? The pack weighs 0.01 pounds.

Can I buy just one O-ring instead of the pack? The 18-7141-9 is sold only as a pack of 5, not as an individual unit.

What color is the Sierra 18-7141-9 O-Ring? It is black, the standard color for this rubber O-ring.

Why buy a pack instead of a single O-ring? Buying the 18-7141-9 in a 5-pack is more economical for owners who service their sterndrive regularly or want spares ready for the next maintenance job.