Quicksilver transom seal repair kit for MerCruiser Alpha One Gen II — 803099T1, bellows & hoses to stop water intrusion

This repair kit is designed to restore a watertight connection between the sterndrive and the transom on compatible MerCruiser Alpha One Gen II units that use exhaust bellows. It gathers the common wear parts you'll need for a thorough transom seal repair in one package, helping stop water intrusion and reduce vibration and exhaust leaks when installed according to manufacturer guidance.

How do I know this kit fits my sterndrive?

Check the MerCruiser model and the presence of exhaust bellows on your Alpha One Gen II sterndrive. The 803099T1 kit is intended specifically for selected MerCruiser Alpha One Gen II applications that use exhaust bellows; verify fitment with your owner's or service manual before purchase.

• Intended for MerCruiser Alpha One, Gen II sterndrives with exhaust bellows
• Confirm model year and part compatibility in your service manual
• OEM Quicksilver parts match original Mercury Marine specifications

What parts are included and what do they do?

The kit supplies the primary components that fail over time at the transom penetration: flexible hoses, rubber seals and gaskets, replacement bellows and the clamps that secure everything. These items work together to block water, contain exhaust gases and maintain proper alignment between the drive and the hull.

• Replacement hose sections for fluid and exhaust routing
• Seals and gaskets to restore a watertight transom flange
• Bellows to replace worn exhaust bellows and maintain exhaust integrity
• Hose clamps for secure, vibration-resistant connections

How difficult is installation and what should I prepare?

Installation requires moderate mechanical skill and basic tools; access to the transom area and the sterndrive is necessary. Follow the owner’s or service manual for torque specs and step-by-step guidance—if you’re not confident, a certified marine technician can perform the work to factory standards.

• Basic hand tools, screwdrivers and pliers for clamps
• Service manual or factory instructions for correct sequence and torque values
• Work in a dry, stable environment and inspect adjacent components while replacing parts

What maintenance benefits will I see after installing the kit?

Replacing degraded seals and bellows reduces the chance of water intrusion into the boat and exhaust leaks that can cause noise, vibration, and accelerated wear. Installing OEM-specified components helps maintain correct alignment and keeps the drive operating as intended.

• Reduced water ingress and improved hull integrity
• Lower risk of exhaust leaks and related vibration or noise
• Maintains factory fit and function using Quicksilver OE-quality parts

Who is this for: The Quicksilver 803099T1 kit is aimed at boat owners, professional mechanics and marina technicians who service MerCruiser Alpha One Gen II sterndrives with exhaust bellows and want an OEM-equivalent solution. Choose this kit if you need a consolidated set of replacement hoses, seals, gaskets, bellows and clamps to restore the transom seal and preserve drive performance. Always consult the boat’s owner or service manual for exact fitment and installation instructions or contact a qualified marine service provider if you need professional installation.