Sierra O-Ring 18-7160-9, Mercury 60/80/90 HP Outboard Gearcase Fitment, Pack of 5

The Sierra 18-7160-9 is a gearcase O-ring sold in a package of 5, designed for Mercury outboard motors. This O-ring is part of Sierra's Mercury Outboard O-Rings & Seals line and is used during gearcase service, seal replacement, and general lower unit maintenance where a reliable, leak-free seal is required. Because it is packaged in quantities of 5, it is well suited for shops or owners who want spares on hand for future service work rather than purchasing a single O-ring at a time.

Fitment data on file for the Sierra 18-7160-9 covers Mercury 60/80/90 outboard motors from 1965-1972. Always confirm the O-ring matches your gearcase application before installation, since Mercury used different sealing components across other outboard and MerCruiser sterndrive model lines.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-7160-9
• Product Type: O-Ring
• Package Quantity: 5
• Weight: 0.08 pounds
• UPC: 808282165383
• Category: Mercury Outboard O-Rings & Seals

Fitment

• Mercury 60/80/90 outboard, 1965-1972

Frequently Asked Questions

What is the Sierra 18-7160-9? It is a gearcase O-ring made by Sierra, sold in a package of 5, listed under Mercury Outboard O-Rings & Seals.

How many O-rings come in a package of 18-7160-9? Each package of the Sierra 18-7160-9 contains 5 O-rings.

What Mercury outboard models does the 18-7160-9 O-ring fit? Fitment on file for the 18-7160-9 covers Mercury 60/80/90 outboard motors from 1965-1972.

How much does a package of Sierra 18-7160-9 O-rings weigh? A package of the Sierra 18-7160-9 weighs 0.08 pounds.

Is the Sierra 18-7160-9 a genuine Sierra part? Yes, 18-7160-9 is the Sierra manufacturer part number for this O-ring, sold in a pack of 5.

What is the UPC for the Sierra 18-7160-9 O-ring package? The UPC for the Sierra 18-7160-9 package of 5 O-rings is 808282165383.

When would I need to replace the 18-7160-9 O-ring? This O-ring is typically replaced during gearcase service or seal replacement on applicable Mercury 60/80/90 outboards from 1965-1972.

Why does the 18-7160-9 come in a pack of 5 instead of a single unit? Sierra packages the 18-7160-9 in quantities of 5 so owners and shops can keep spares on hand for future gearcase service.

Does the Sierra 18-7160-9 fit all Mercury outboards? No, fitment data on file for the 18-7160-9 is specific to Mercury 60/80/90 outboard motors from 1965-1972; it should not be assumed to fit other model lines.

What category does the 18-7160-9 O-ring fall under? The Sierra 18-7160-9 is categorized under Mercury Outboard O-Rings & Seals.