Sierra 18-2146 Yoke, Replaces Mercruiser 59830A7, Fits Alpha One, Bravo & Cobra Drives

The Sierra 18-2146 Yoke is a drive coupler yoke used to connect the engine coupler to the U-joint shaft on outdrive and sterndrive setups. It is built as a direct-fit replacement for the original equipment yoke and is designed to restore proper alignment and torque transfer between the engine and drive unit. This yoke fits All #1, R, MR, Alpha I, and Alpha I Gen II drives, as well as Bravo and Blackhawk drives, and it also fits Cobra sterndrives from 1986 and up. It is constructed of metal and finished in white, with compact dimensions of 0.39 x 0.39 x 0.39 inches, making it a small but critical connecting component in the drive train. The yoke is sold as a single piece and is intended as a like-for-like swap for the original part it replaces, meeting or exceeding the performance of the OEM component. Because this yoke crosses over multiple engine and drive brands, it is commonly used as a direct replacement for OEM and aftermarket yokes sold under GLM, Evinrude/Johnson, Mallory, Mercruiser, OMC, and Volvo Penta part numbers. Confirm your drive model against the fitment list below before ordering to ensure correct compatibility.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2146
• Product Name: Yoke
• Material: Metal
• Color: White
• Item Dimensions (L x W x H): 0.39 x 0.39 x 0.39 inches
• Weight: 4.43 pounds
• Number of Pieces: 1
• UPC: 030999752635

Fitment

• All #1, R, MR, Alpha I, Alpha I Gen II, Bravo & Blackhawk drives
• Cobra drives, 1986 and up

Replaces (OEM)

• GLM 28315
• Evinrude/Johnson 912212
• Mallory 9-72401
• Mercruiser 59830A7
• Mercruiser 59830A1
• OMC 912212
• OMC 3850815
• Volvo Penta 3850815

Frequently Asked Questions

What drives does the Sierra 18-2146 Yoke fit? This yoke fits All #1, R, MR, Alpha I, and Alpha I Gen II drives, as well as Bravo and Blackhawk drives, and it also fits Cobra drives from 1986 and up.

Is the Sierra 18-2146 a genuine OEM part or an aftermarket replacement? The 18-2146 is a Sierra-manufactured replacement part designed to meet or exceed the performance of the original equipment yoke it replaces, rather than a part sourced from the original engine or drive manufacturer.

What OEM part numbers does the Sierra 18-2146 Yoke cross-reference to? It is interchangeable with GLM 28315, Evinrude/Johnson 912212, Mallory 9-72401, Mercruiser 59830A7 and 59830A1, OMC 912212 and 3850815, and Volvo Penta 3850815.

What material is the 18-2146 Yoke made of? The Sierra 18-2146 Yoke is made of metal, finished in white.

How much does the Sierra 18-2146 Yoke weigh? The Sierra 18-2146 Yoke weighs 4.43 pounds.

What are the dimensions of the 18-2146 Yoke? The yoke measures 0.39 x 0.39 x 0.39 inches.

Does the 18-2146 Yoke come as a single piece? Yes, the Sierra 18-2146 Yoke is sold individually as one piece.

Will the Sierra 18-2146 fit a Cobra drive built before 1986? The 18-2146 Yoke is listed as a fit for Cobra drives from 1986 and up; fitment for earlier Cobra drives is not specified.

Can the Sierra 18-2146 Yoke be used on both Alpha One and Bravo drives? Yes, this same yoke, part number 18-2146, fits Alpha I, Alpha I Gen II, and Bravo drives, along with All #1, R, MR, and Blackhawk drives.

How do I identify the correct yoke for my Mercruiser drive? If your Mercruiser drive originally used part number 59830A7 or 59830A1, the Sierra 18-2146 Yoke is the correct cross-reference replacement.