Sierra 18-1728 Bellows Flange Ring for MerCruiser Alpha One Gen II

The Sierra 18-1728 bellows flange ring is a precision-machined replacement component designed for MerCruiser Alpha One Gen II stern drives manufactured from 1991 to present (serial numbers 0D469859 and up). This critical transom component works in conjunction with the drive bellows system to maintain a proper seal between the transom assembly and drive unit.

Key Features:

• Precision-machined to match OEM specifications for exact fit and performance
• Direct replacement for MerCruiser part number 816607 and Mallory 9-73117
• Compatible with MerCruiser Alpha One Gen II drives, Vazer Drive, and Vazer Transom applications
• Manufactured from durable materials to withstand harsh marine environments
• Meets or exceeds original equipment specifications

Sierra International is a trusted supplier to OEM engine manufacturers and boat builders, providing quality marine parts engineered to meet the demands of today's high-horsepower engines. This flange ring is an essential component when servicing or replacing transom bellows assemblies.