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Sierra 18-0685 Mercruiser Valve Cover Gasket for MCM 3.7L Engines

Manufacturer

Picture for manufacturer Sierra

Part Number

18-0685
8 reviews
Sale Price

$37.70

In Stock (6)

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Usually delivered within 2 days

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Product Details

The Sierra 18-0685 is a replacement valve cover gasket engineered for MerCruiser MCM 3.7L sterndrive engines produced from 1976 to 1989. Designed to meet OEM specifications, this gasket provides a reliable seal between the valve cover and cylinder head, preventing oil leaks and protecting the valve train from contamination and the elements.

Key Features:

  • Direct replacement for MerCruiser OEM part number 27-73666
  • Engineered to fit MCM 3.7L engines (1976–1989)
  • Durable construction for long-term, dependable sealing performance
  • Helps prevent oil leaks for cleaner, more efficient engine operation
  • Meets or exceeds OEM quality standards

Cross-Reference Part Numbers:

  • MerCruiser: 27-73666
  • GLM: 31820
  • Sierra: 47-0685
  • Sierra alternate: 9-61313
  • 92-31820D

Sierra marine engine parts are trusted by boaters and technicians alike for their precision fit and reliable performance. The 18-0685 valve cover gasket is an essential maintenance component for keeping MerCruiser 3.7L engines running cleanly and efficiently.

Great price !!!!!!!!

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Good quality product and fast delivery

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Autoplicity had the best price on the Wiseco pistons I needed anywhere. Took a little longer to arrive than I expected but apparently that was due to the pistons being shipped directly from the factory. Otherwise a very good experience overall.

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