Sierra Transom Seal Kit 18-8205, Replaces 30-803098T1, Fits MerCruiser I, R, MR, Alpha One with Exhaust Tube

The Sierra 18-8205 Transom Seal Kit is a complete sterndrive transom repair kit built to reseal the connection between the outdrive and the transom assembly on MerCruiser I, R, MR, and Alpha One drives equipped with an exhaust tube. Water intrusion at the transom is one of the most common causes of gimbal housing corrosion and outdrive damage, and this kit provides the gasket and bearing components needed to restore a proper seal in one job rather than sourcing individual parts separately.

The kit includes a Sierra 18-2619-1 outdrive gasket set (cross-referencing O.E. Numbers 27-64818A3 and 27-94996A1, Q2) and a Sierra 18-2100 gimbal bearing (cross-referencing O.E. Numbers 30-60794A2 and 30-60794A4). The gimbal bearing is greaseable, allowing it to be serviced with a grease gun after installation rather than requiring replacement to relubricate. The kit is finished in white and is built to meet or exceed original equipment quality as a direct replacement for MerCruiser part 30-803098T1.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-8205
• Product Type: Transom Seal Kit
• Fitment: MerCruiser I, R, MR, Alpha One drives with exhaust tube
• Includes: Outdrive Gasket Set (Sierra 18-2619-1) and Gimbal Bearing (Sierra 18-2100, greaseable)
• Replaces (OEM): 30-803098T1
• Color: White
• Item Dimensions: 13.2 x 10.2 x 6.8 inches
• Weight: 4.5 pounds
• Quantity: 1 kit
• UPC: 808282100988

Fitment

• MerCruiser I, R, MR, and Alpha One drives with exhaust tube

Replaces (OEM)

• 30-803098T1

Frequently Asked Questions

What does the Sierra 18-8205 Transom Seal Kit replace? It is a direct replacement for OEM part 30-803098T1, used to reseal the transom assembly on compatible MerCruiser sterndrives.

Which drives is the 18-8205 transom seal kit designed for? This kit fits MerCruiser I, R, MR, and Alpha One drives equipped with an exhaust tube.

What is included in the Sierra 18-8205 kit? The kit contains a Sierra 18-2619-1 outdrive gasket set and a Sierra 18-2100 gimbal bearing, giving you both major sealing components in a single package.

Is the gimbal bearing in this kit greaseable? Yes, the gimbal bearing included in the 18-8205 kit is greaseable, so it can be re-lubricated with a grease gun during routine service.

What OEM numbers does the gasket set cross-reference? The 18-2619-1 outdrive gasket set included in the 18-8205 kit cross-references O.E. Numbers 27-64818A3 and 27-94996A1, Q2.

What OEM numbers does the gimbal bearing cross-reference? The 18-2100 gimbal bearing included in the 18-8205 kit cross-references O.E. Numbers 30-60794A2 and 30-60794A4.

How much does the 18-8205 transom seal kit weigh? The Sierra 18-8205 Transom Seal Kit weighs 4.5 pounds.

What color is the transom seal kit? The Sierra 18-8205 Transom Seal Kit is white.

What are the dimensions of the 18-8205 kit as packaged? The Sierra 18-8205 Transom Seal Kit measures 13.2 x 10.2 x 6.8 inches.

How many of each part come in the kit? The 18-8205 kit includes one outdrive gasket set and one gimbal bearing, for a complete single-installation transom reseal.

Is this a genuine Sierra part or an aftermarket copy? The 18-8205 is a genuine Sierra part built to meet or exceed original equipment quality as a direct replacement for MerCruiser 30-803098T1.

Does the 18-8205 kit fit drives without an exhaust tube? No, this kit is specified for MerCruiser I, R, MR, and Alpha One drives that have an exhaust tube.