SIERRA 18-2104 Transmission U-Joint

Compatible Engines

The SIERRA 18-2104 transmission U-joint is a critical drive component designed to ensure smooth and reliable power transmission in marine vessels. This part is specifically engineered for use in transmissions from MERCRUISER, OMC, and VOLVO PENTA, including popular Alpha One Gen I sterndrives (serial numbers 1684188 to B418818), as well as Cobra units from 1986-1989 and TR/TRS and II SSM series.

Due to the specific design variations of different propulsion units, compatibility must be verified by the manufacturer's catalog number (18-2104) or OE number. We do not provide a list of all compatible engines to avoid selection errors. If you have any doubts about fitting this part to your specific boat model, we strongly recommend contacting our customer support to confirm part compatibility.

Installation and Maintenance

• Original SIERRA Quality – guarantees durability and corrosion resistance in harsh marine conditions.
• Precision Engineering – perfect dimensional fit ensures quiet transmission operation without vibrations.
• Easy Replacement – the standard U-joint shape facilitates removal and installation in the workshop.
• Water Safety – regular replacement of this component prevents breakdowns during your cruise.

Replacing the U-joint is a procedure that extends the lifespan of the entire drive system. Remember to perform regular maintenance and check for play. EAN: 030999310293.