Sierra 18-8218 Transom Seal Kit for MerCruiser Alpha One Gen II

The Sierra 18-8218 Transom Seal Kit is a complete service kit designed for MerCruiser Alpha One Generation II stern drives manufactured from 1991 and up with serial numbers 0D469859 and higher. This comprehensive kit includes all the essential components needed to remove and reinstall your stern drive from the transom, making it ideal for routine maintenance and bellows replacement.

Kit Includes:

• Sealed gimbal bearing (non-greasable)
• Shift cable bellows with clamps
• Exhaust bellows
• U-joint bellows with retainer
• Water intake hose with clamps
• Bell housing gasket
• Outdrive mounting gasket
• Complete O-ring set (multiple sizes included)
• 18-21006 Permalube lubricant

This kit features a sealed gimbal bearing that eliminates the need for regular greasing and can be used to retrofit older Gen II drives equipped with greasable gimbal bearings to the newer sealed design. Manufactured with marine-grade materials, all Sierra components are engineered to meet or exceed OEM specifications for reliable performance in harsh marine environments.

Replaces: MerCruiser 30-803099T1, Mallory 9-72900, 9-72906