New engine coupler for MerCruiser marine gas engines with sterndrive. Does not replace applications with triangular 3-bolt coupler. Replaces Mercury part number 76850A2. Sierra part number 18-2171.
- Overall diameter: 4-1/2″
- Bolt center diameter: 3-9/16″
- Overall length: 4-1/2″
- Mounting holes: 6
About Sierra
Sierra provides premium-quality aftermarket replacements for over 6,000 marine parts, tools, and components. Sierra products are engineered to meet or exceed OEM standards, and stand up in harsh marine environments. Every new Sierra part comes with a limited lifetime warranty that covers the useful life of the product against any defects in workmanship and materials.
