Sierra O-Ring 18-7100-9, Replaces 25-85594, Pack of 5

The Sierra 18-7100-9 O-Ring is a replacement sealing O-ring sold as a package of 5, designed to restore a proper seal on Evinrude outboard components where the original O-ring has hardened, cracked, or lost its seal over time. Supplying multiples in a single package makes it practical to keep spares on hand for routine maintenance, seasonal service, or repairs that call for more than one O-ring at a time. As a direct replacement for the OEM number it corresponds to, it is intended to fit in place of the original part without modification.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-7100-9
• Package Quantity: 5 O-Rings per package
• Inside Diameter: 0.2362
• Width (mm): 0.1575
• Weight: 0.02 pounds
• Category: Evinrude Outboard Parts

Fitment

• Evinrude outboard applications using O.E. Number 25-85594

Replaces (OEM)

• 25-85594

Frequently Asked Questions

What does the Sierra 18-7100-9 O-Ring replace? It replaces OEM number 25-85594 on applicable Evinrude outboard applications.

How many O-rings come in a package? The 18-7100-9 is sold as a package of 5 O-rings, not as a single piece.

What is the inside diameter of this O-ring? The Sierra 18-7100-9 O-ring has an inside diameter of 0.2362.

What width is the 18-7100-9 O-ring? The width listed for the Sierra 18-7100-9 O-ring is 0.1575 mm.

Is this a genuine Sierra part or an aftermarket copy? The 18-7100-9 is a Sierra-branded part manufactured to replace OEM number 25-85594, not a re-badged OEM component.

What category of equipment is this O-ring used on? Sierra lists the 18-7100-9 O-ring under Evinrude outboard parts.

How much does a package of these O-rings weigh? A package of 5 Sierra 18-7100-9 O-rings weighs 0.02 pounds.

Can I buy a single O-ring instead of a pack of 5? No, the Sierra 18-7100-9 is only offered as a package of 5 O-rings.

Will this O-ring fit if my old one is cracked or hardened? Yes, the 18-7100-9 is intended as a direct replacement for OEM number 25-85594 when the original O-ring has degraded.

Does this cross-reference to any other part numbers? The only cross-reference listed for the Sierra 18-7100-9 O-ring is OEM number 25-85594.