SIERRA 18-6406 Transmission Universal Joint

Compatible Engines

The SIERRA 18-6406 transmission universal joint is a critical component of the drive train system, engineered for durability and smooth operation. This part is specifically designed for MERCRUISER Alpha I Gen II transmissions (series from serial number 0L949779-up) and Bravo models (series from serial number 0M111208-up). Manufactured using high-quality materials, this product ensures a long service life even under demanding marine operating conditions.

Due to the specific nature of propulsion systems, compatibility must always be verified by the manufacturer's catalog number (18-6406) or the original OE number (0L949779/0M111208). We do not provide a list of other brands' engines to avoid errors. If you have any doubts about fitting this part to your vessel, contact our customer support – we are happy to help you select the correct component.

Installation and Maintenance

• Seasonal Replacement: Universal joints are wear items; we recommend regular replacement for safety.
• Lubrication: Before installation, ensure that new components are properly lubricated with waterproof grease.
• Check for Play: Before installing, check the condition of bearings and bushings to avoid premature wear of the new universal joint.

By choosing the SIERRA 18-6406, you invest in reliability and comfort on the water.