Sierra 18-2125 Drive Shaft Yoke, Replaces Mercury Marine 46020T

The Sierra 18-2125 is a drive shaft yoke assembly built as a direct equivalent for Mercury Marine part 46020T. The yoke connects the drive shaft to the u-joint coupler in the stern drive gimbal assembly, transmitting engine torque through the drive train. It is finished in black and constructed for reliable, repeated use in a marine environment where corrosion resistance and dimensional accuracy matter.

This yoke is sold as a single component (one yoke per package) and is intended as a replacement part when the original yoke shows wear, cracking, or play at the u-joint connection. Because it is manufactured to match the original Mercury Marine 46020T equivalent, it installs using the same fasteners and mating parts as the original part it replaces, without modification.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2125
• Product Name: Yoke
• Color/Finish: Black
• Item Dimensions (L x W x H): 7.4 x 3.4 x 3.3 inches
• Weight: 2.2 pounds
• Number of Items: 1
• UPC: 030999311436

Fitment

Fits applications that originally used Mercury Marine part number 46020T.

Replaces (OEM)

• Mercury Marine 46020T

Frequently Asked Questions

What does the Sierra 18-2125 yoke replace? It is a direct equivalent for Mercury Marine part number 46020T, so it installs anywhere that original part was used.

Is the 18-2125 an OEM Mercury Marine part or aftermarket? The 18-2125 is manufactured by Sierra as an aftermarket equivalent to the Mercury Marine 46020T yoke, not an original Mercury Marine part.

What color is the Sierra 18-2125 yoke? It has a black finish.

How much does the Sierra 18-2125 weigh? This yoke weighs 2.2 pounds.

What are the dimensions of the 18-2125 yoke? The item measures 7.4 x 3.4 x 3.3 inches (length x width x height).

How many yokes come in the package? The 18-2125 is sold as a single yoke, one item per package.

What signals that a drive shaft yoke needs replacement? Cracking, wear, or excess play at the u-joint connection point on the existing yoke indicates it is time to replace it with a part like the Sierra 18-2125.

Does installing the 18-2125 require modification to the drive shaft housing? No. Since the Sierra 18-2125 is built to match the Mercury Marine 46020T it replaces, it uses the same mounting points and mating parts without modification.

What is the UPC for the Sierra 18-2125 yoke? The UPC for the Sierra 18-2125 drive shaft yoke is 030999311436.

Where does the yoke fit in the drive train? The 18-2125 yoke connects the drive shaft to the u-joint coupler in the gimbal assembly, transmitting torque from the engine through the drive shaft.