Sierra 18-2500-9 Exhaust Cover Gasket, Replaces Mercury 27-85493, Pack of 2

The Sierra 18-2500-9 Exhaust Cover Gasket is a round, multi-colored gasket engineered to seal the exhaust cover on applicable Mercury outboard engines, sold in a pack of 2 so both sides can be replaced together. It is built to meet or exceed the quality of the original equipment part it replaces, giving installers a dependable seal against exhaust gas and water leakage at the cover joint. Each gasket is manufactured by Sierra International, a long-established supplier of marine replacement parts, and is cross-referenced to GLM 32010 and Mercury part numbers 27-85493, 27-52893, and 27-72505, making it straightforward to match against the OEM part being replaced. Because gaskets compress and lose their sealing ability over time and with repeated heat cycling, replacing the exhaust cover gasket during routine maintenance or whenever the exhaust cover is removed helps prevent leaks and corrosion around the cover mounting surface. At 0.32 pounds for the pack, this is a lightweight, low-cost maintenance item worth keeping on hand for outboard servicing.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2500-9
• Package Quantity: 2 gaskets
• Weight: 0.32 pounds
• Shape: Round
• Color: Multi-colored
• Category: Mercury Outboard Gaskets
• UPC: 808282162481

Replaces (OEM)

• GLM 32010
• Mercury 27-85493
• Mercury 27-52893
• Mercury 27-72505

Frequently Asked Questions

What does the Sierra 18-2500-9 Exhaust Cover Gasket fit? The Sierra 18-2500-9 is designed as a replacement exhaust cover gasket for Mercury outboard engines that originally used Mercury gasket numbers 27-85493, 27-52893, or 27-72505.

Is the Sierra 18-2500-9 the same as GLM 32010? Yes, GLM 32010 is a cross-referenced equivalent to the Sierra 18-2500-9 Exhaust Cover Gasket, so either number can be used to identify the same part.

How many gaskets come in a pack of the 18-2500-9? Each pack of the Sierra 18-2500-9 Exhaust Cover Gasket contains 2 gaskets.

What Mercury part numbers does the 18-2500-9 replace? It replaces Mercury 27-85493, Mercury 27-52893, and Mercury 27-72505.

How much does the exhaust cover gasket pack weigh? The Sierra 18-2500-9 pack of 2 gaskets weighs 0.32 pounds.

What shape and color is the 18-2500-9 gasket? The Sierra 18-2500-9 Exhaust Cover Gasket is round and multi-colored.

Is the Sierra 18-2500-9 a genuine Mercury part or an aftermarket replacement? It is a Sierra-branded aftermarket replacement gasket, manufactured to meet or exceed the quality of the original Mercury equipment it replaces.

When should I replace the exhaust cover gasket on my outboard? The exhaust cover gasket should be replaced whenever the exhaust cover is removed for service, or if you notice leaking at the cover joint, since the Sierra 18-2500-9 gasket loses its seal after removal or extended heat exposure.

What is included when I order the 18-2500-9? An order of the Sierra 18-2500-9 includes a pack of 2 Exhaust Cover Gaskets, sized for a complete replacement in a single service.

Does the 18-2500-9 come with installation hardware? No, the Sierra 18-2500-9 pack contains only the 2 exhaust cover gaskets; it does not include bolts or other hardware.