Sierra Exhaust Leg Rubber Seal 18-0540, Replaces OMC 320936, for OMC Cobra Sterndrive

The Sierra 18-0540 Exhaust Leg Rubber Seal is a rubber sealing component designed for OMC Cobra sterndrive applications. It seals the exhaust leg to prevent water intrusion and exhaust leakage at the joint, helping protect surrounding components from corrosion and heat damage caused by a failed seal. The seal is molded from rubber in a round shape and finished in white.

Sierra manufactures this seal to meet or exceed the quality of the original equipment part it replaces, making it a reliable choice when servicing the exhaust leg on compatible OMC Cobra sterndrive units. Replacing a worn or cracked exhaust leg seal at the first sign of deterioration helps avoid water entering the exhaust system and prevents more costly repairs down the line. Each unit is sold individually and is straightforward to install as part of a routine exhaust leg service.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-0540
• Product Name: Exhaust Leg Rubber Seal
• Material: Rubber
• Color: White
• Shape: Round
• Weight: 0.05 pounds
• UPC: 030999874481

Fitment

• OMC Cobra sterndrive applications

Replaces (OEM)

• 320936

Frequently Asked Questions

What is the Sierra 18-0540 used for? The Sierra 18-0540 is a rubber seal that fits on the exhaust leg of an OMC Cobra sterndrive, sealing the joint to prevent water and exhaust leakage.

Does the 18-0540 seal replace OEM part 320936? Yes, the Sierra 18-0540 Exhaust Leg Rubber Seal replaces OEM part number 320936 and is built to meet or exceed the quality of the original part.

What material is the 18-0540 exhaust leg seal made from? It is made from rubber, molded in a round shape, and finished in white.

How much does the 18-0540 seal weigh? The Sierra 18-0540 Exhaust Leg Rubber Seal weighs 0.05 pounds.

What color is the Sierra 18-0540 seal? This exhaust leg seal is white.

Is the 18-0540 an OEM or aftermarket part? The 18-0540 is a Sierra aftermarket replacement seal manufactured to meet or exceed the specifications of the original equipment part it replaces.

How many seals come in a package of the 18-0540? The 18-0540 Exhaust Leg Rubber Seal is sold as a single unit count of one.

What boats or engines use the 18-0540 exhaust leg seal? The 18-0540 is designed for OMC Cobra sterndrive applications where an exhaust leg rubber seal is required.

How do I know if my exhaust leg seal needs replacement? If the exhaust leg rubber seal on an OMC Cobra sterndrive is cracked, hardened, or leaking, it should be replaced with a seal such as the Sierra 18-0540 to prevent water intrusion into the exhaust system.

What is the UPC for the Sierra 18-0540 seal? The UPC for the Sierra 18-0540 Exhaust Leg Rubber Seal is 030999874481.