Description

Mercury / MerCruiser Quicksilver Water Pump Gasket — 879150138

The Mercury Quicksilver 879150138 (Mercury format 27-879150138) is a genuine OEM circulating water pump gasket used on select MerCruiser sterndrive engines. It seals the mating surface between the circulating water pump and the engine block/front cover, preventing coolant leaks and ensuring proper cooling system operation.

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Key Specifications

• Part Number: 879150138

• Mercury Format:27-879150138

• Component Type: Circulating water pump gasket

• OEM Brand: Mercury Marine / Quicksilver

• Typical Price Range: about $7–$10 USD depending on supplier

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Compatible Engines

Commonly used on MerCruiser GM-based engines, particularly:

• 3.0L (181 CID) 4-cylinder MerCruiser engines

• Certain 3.0L TKS models depending on serial number range

These engines are typically paired with Alpha sterndrives in many runabouts and small cruisers.

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Function

The gasket provides a tight seal between the circulation pump housing and engine block, helping to:

• Prevent coolant leaks

• Maintain proper cooling system pressure

• Ensure efficient engine temperature control

Because it is a thin sealing gasket, it is normally replaced whenever the circulating pump is removed or serviced.

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Superseded / Related Numbers

Some catalogs list related or earlier numbers such as:

• 27-810848 (earlier design superseded by 879150138)

Aftermarket equivalents may also appear under brands such as Sierra or Mallory, but OEM Mercury gaskets ensure exact fit.

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Fitment Tip:
Always confirm compatibility using the engine serial number. Even within the 3.0L MerCruiser series, different production ranges may use slightly different pump housings or gasket styles.

Shipping:

OEM parts ship same or next day for fast Canada wide shipping.

Technical Specifications:

• Type: Water pump mounting gasket
• Compatible with: Mercury MerCruiser marine engines
• Part Number: 879150138