Sierra Engine Coupler - SIE-18-2171

Sierra 18-2171 MerCruiser Engine Coupler

Sierra replacement round style engine coupler for all GM marine engines Except MerCruiser MR/Alpha/Bravo with Triangular, 3-bolt coupler. All Sierra aftermarket parts are manufactured to meet or exceed OEM requirements.

Interchangeable with:

GLM

11500

Mallory

9-72502

MerCruiser Stern Drive

32492A2

32492A3

32492A5

38965A1

38965A2

76850A2

How to Align Your Boat Engine Video

Frequently Asked Questions

• What is the Sierra 18-2171 MerCruiser Engine Coupler used for? The Sierra 18-2171 MerCruiser Engine Coupler is a replacement round-style engine coupler designed for GM marine engines in the applications specified by Sierra. It is manufactured to meet or exceed OEM requirements and is intended as a replacement component for compatible marine engine applications.
• Which engines does the Sierra 18-2171 Engine Coupler fit? The Sierra 18-2171 fits all GM marine engines except MerCruiser MR, Alpha, and Bravo applications that use a triangular, 3-bolt coupler. Before ordering, verify that your engine uses the round-style coupler rather than the excluded triangular, 3-bolt design.
• What type of engine coupler is the Sierra 18-2171? The Sierra 18-2171 is a round-style engine coupler. The product description specifically distinguishes this design from the triangular, 3-bolt coupler used on the excluded MerCruiser MR, Alpha, and Bravo applications.
• Is the Sierra 18-2171 interchangeable with other engine coupler part numbers? Yes. The Sierra 18-2171 is listed as interchangeable with GLM 11500, Mallory 9-72502, and several MerCruiser Stern Drive part numbers, including 32492A2, 32492A3, 32492A5, 38965A1, 38965A2, and 76850A2. Verify the applicable part number and coupler style before replacement.
• Does the Sierra 18-2171 meet OEM requirements? According to the product description, Sierra aftermarket parts are manufactured to meet or exceed OEM requirements. The Sierra 18-2171 is identified as a replacement round-style engine coupler for the specified GM marine engine applications.