Professional Transom Sealing Solution - Complete Kit for MerCruiser Alpha I Systems

Restore watertight integrity to your MerCruiser sterndrive system with the Sierra 18-8217 transom seal kit, engineered as a complete replacement for Mercury Marine part number 30-803098T1. This comprehensive kit includes all necessary seals, gaskets, and components required for professional transom maintenance on MerCruiser R, MR, and Alpha I drives, ensuring reliable protection against water intrusion and maintaining optimal drive performance.

Complete Seal System

The Sierra 18-8217 provides a comprehensive sealing solution with all components engineered to work together as a complete system. Each component meets or exceeds original equipment specifications, ensuring proper fit, function, and long-term reliability in demanding marine environments. This complete kit approach eliminates the guesswork of individual component selection while ensuring compatibility across all kit components.

MerCruiser Compatibility

Comprehensive Kit Contents

• 18-2760 Exhaust Tube: Complete exhaust tube replacement component
• 18-2743 Outdrive Mounting Gasket: Critical seal between outdrive and transom
• 18-2840 Bell Housing Gasket: Seals bell housing connection
• 18-21001 Gimbal Bearing: Sealed gimbal bearing for smooth operation
• 18-3602 & 18-3601 Water Intake Hoses: Cooling system hose components
• 18-7153, 18-7170, 18-7117 O-Rings: Precision O-rings for multiple seal points
• 18-2753-2 Shift Cable Bellows: Protects shift cable from water intrusion

Professional Installation Benefits

• Complete System Approach: All components designed to work together seamlessly
• OEM-Quality Materials: Meets or exceeds original equipment specifications
• Precision Fit: Engineered for exact OEM replacement compatibility
• Marine-Grade Construction: Materials selected for saltwater environment durability
• Professional Installation: Designed for certified marine technician service

Critical Transom Protection

The transom seal system is critical for preventing water intrusion into the boat's interior and protecting expensive engine components. Failed seals can lead to catastrophic damage including engine flooding, electrical system damage, and structural issues. This comprehensive kit ensures complete protection with all sealing points addressed in a single service procedure.

Maintenance Importance

Regular transom seal maintenance is essential for MerCruiser sterndrive reliability and safety. The components in this kit are subject to constant exposure to water pressure, temperature cycling, and mechanical stress. Professional replacement at recommended intervals prevents costly emergency repairs and protects your investment in marine equipment.

Quality Assurance

Sierra Marine maintains strict quality standards, ensuring each component meets the demanding requirements of marine applications. As an OEM supplier to many engine manufacturers, Sierra's components provide the reliability and performance that marine professionals expect for critical sealing applications.