Sierra 118-2171 Marine Engine Coupler for GM Sterndrive Engines

The Sierra 118-2171 Engine Coupler is a premium-quality aftermarket replacement designed to connect GM marine engines to sterndrive systems. This round-style engine coupler fits all GM marine engines except MerCruiser MR/Alpha/Bravo models with triangular 3-bolt couplers.

Key Features:

• Features 6 mounting holes for secure installation
• Compatible with early GM Chevy 4-cylinder, 6-cylinder, and 8-cylinder engines with 2-piece rear main seal and 3-1/2" diameter crankshaft bolt pattern
• Manufactured to meet or exceed OEM requirements
• Replaces Mercury part numbers 76850A2, 32492A2, 32492A3, 32492A5, 38965A1, and 38965A2
• Cross-references with GLM 11500 and Mallory 9-72502

Sierra products are engineered to meet today's high horsepower engine demands and stand up in the harsh marine environment. This coupler provides reliable power transfer from the engine to the drive system, ensuring smooth operation and long-lasting performance on the water.

Important Note: Do not use this coupler if you have a MR/Alpha/Bravo with triangular 3-bolt coupler.