Transom Seal Replaces Mercury 43713 Alpha Gen II Fits All Bravo Sierra 18-2724

Transom Seal for Mercury

This transom seal replaces Mercury part 43713 (cross-reference 18-2724) and fits Alpha Gen II and all Bravo Sierra sterndrives, sealing the transom opening to prevent water leaks.

Overview

This transom seal for Mercury is a replacement for OEM number 43713 and also carries cross-reference 18-2724, making it a versatile option for Alpha Gen II and Bravo Sierra drives. It fits between the transom and gimbal ring, creating a watertight barrier that protects the hull and drive components. Designed for marine applications, this seal ensures long-lasting performance in saltwater and freshwater environments.

Built For Performance

• Constructed from corrosion-resistant rubber compound
• Maintains flexibility for a tight, even compression
• Resists oil, fuel, and exhaust exposure
• Matches factory gasket thickness for proper alignment
• Simple bolt-on installation without modification

Fits These Machines

• for Mercury Alpha Gen II
• for Mercury Bravo Sierra

On-The-Job Use

• Replaces deteriorated seals during sterndrive overhaul
• Used when repairing transom cracks or corrosion
• Installed during engine alignment checks
• Required after removing the drive for winterization

Specs At A Glance

Good To Know

Q: Does this seal work for both Alpha and Bravo? A: Yes, it fits Mercury Alpha Gen II and all Bravo Sierra models, and the cross-reference 18-2724 confirms its interchangeable application.

Q: How do I ensure a proper fit? A: Check your serial number and drive model, as production changes may affect gasket thickness or hole alignment; the seal should match factory dimensions.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.