Sierra 18-7112 O-Ring for OMC Sterndrive/Cobra Stern Drive, Replaces Johnson/Evinrude 302493

The Sierra 18-7112 O-Ring is a rubber sealing ring built for use in select Johnson/Evinrude engines, including OMC Sterndrive and Cobra Stern Drive applications. It has a 1.170 inch (29.7mm) inside diameter and a 0.135 inch (3.4mm) width, sized to create a reliable seal at its designated mating surface. Each package contains one O-ring. As a Sierra part, the 18-7112 is manufactured to meet or exceed the performance of the original equipment part it replaces, making it a straightforward option when a factory O-ring has hardened, cracked, or lost its seal over time. It is interchangeable with GLM 82170 and Johnson/Evinrude Outboard 302493, so it can be ordered using any of those reference numbers. Because O-rings of this size can appear in multiple locations on a sterndrive or outboard, buyers should confirm the dimensions and application against their engine's manufacturer recommendations before ordering to ensure a proper fit. The 18-7112 is a simple, low-cost maintenance item worth keeping on hand for routine service or repair work on compatible Johnson/Evinrude powered boats.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-7112
• Inside Diameter: 1.170 inches (29.7mm)
• Width: 0.135 inches (3.4mm)
• Material: Rubber
• Unit Count: 1 O-ring per package
• Weight: 0.01 pounds
• UPC: 030999321329

Fitment

Designed for use in select Johnson/Evinrude engines, including OMC Sterndrive and Cobra Stern Drive applications.

Replaces (OEM)

• GLM 82170
• Johnson/Evinrude Outboard 302493

Frequently Asked Questions

What size is the Sierra 18-7112 O-Ring? The Sierra 18-7112 O-Ring has a 1.170 inch (29.7mm) inside diameter and a 0.135 inch (3.4mm) width.

What engines does the Sierra 18-7112 O-Ring fit? It is designed for use in select Johnson/Evinrude engines, including OMC Sterndrive and Cobra Stern Drive applications. Confirm the exact application against your engine's manufacturer recommendations before ordering.

Is the Sierra 18-7112 the same as GLM 82170? Yes, the Sierra 18-7112 O-Ring is interchangeable with GLM 82170.

Does the Sierra 18-7112 cross-reference to a Johnson/Evinrude part number? Yes, it is interchangeable with Johnson/Evinrude Outboard part number 302493.

What material is the 18-7112 O-Ring made from? It is made from rubber, suited for use as a sealing O-ring in marine engine applications.

How many O-rings come in a package? One Sierra 18-7112 O-Ring is included per package.

How much does the Sierra 18-7112 O-Ring weigh? The 18-7112 O-ring weighs 0.01 pounds.

Is the Sierra 18-7112 an OEM or aftermarket part? The 18-7112 is a Sierra aftermarket O-ring manufactured to meet or exceed the performance of the original equipment part it replaces.

How do I know if this O-ring will fit my engine? Because O-rings of this size and shape can be used in more than one location on an engine, check the 1.170 inch inside diameter and 0.135 inch width, along with your manufacturer's recommendations, before ordering the Sierra 18-7112.

What is the UPC for the Sierra 18-7112 O-Ring? The UPC for the Sierra 18-7112 O-Ring is 030999321329.