Sierra 18-2617 Outdrive Gasket Set for MerCruiser 1A 1B 1C EZ Shift Drives

The Sierra 18-2617 Outdrive Gasket Set is a complete replacement gasket kit designed for MerCruiser MC-I style stern drives, including the 1A, 1B, 1C, and EZ Shift outdrive models. This set directly replaces OEM Mercury MerCruiser part number 27-35996A1 and Mallory part number 9-62603, providing a cost-effective aftermarket solution without sacrificing fit or function.

This gasket kit provides all the necessary seals to properly mate the sterndrive unit to the bell housing, helping prevent water intrusion and maintaining a reliable seal between critical drivetrain components. Each piece is manufactured to meet or exceed the original equipment specifications it replaces.

Key Features:

• Replaces OEM MerCruiser part number 27-35996A1
• Also replaces Mallory 9-62603
• Designed for MerCruiser MC-I outdrive models: 1A, 1B, 1C, and EZ Shift
• Engineered to meet or exceed original equipment manufacturer (OEM) specifications
• Includes all gaskets required for outdrive bell housing installation
• Built to withstand the demands of the harsh marine environment
• Backed by the SeaStar Solutions Two-Year Warranty

Sierra is a trusted name in marine replacement parts, supplying OEM engine manufacturers and boat builders with quality components. The 18-2617 outdrive gasket set ensures a proper seal during outdrive installation or service, making it an essential part of any MerCruiser stern drive rebuild or maintenance job.