Hinge Pin Tool – Fits MerCruiser Alpha & Bravo (Replaces 91-78310, 18-9861) Yamaha Fragments of a failed impeller

Fragments of a failed impeller can also clog downstream cooling passages

This 90-degree fitting is specifically designed for the tight space and hose angle required in the transom mount location on Alpha One Gen II and Bravo drives

Locate the alternator and identify the tensioning bolt and pivot bolt

Is this an authentic OEM part

Hinge Pin Tool – Fits MerCruiser Alpha & Bravo (Replaces 91-78310, 18-9861) Yamaha Fragments of a failed impellerProduct Details This specialty Hinge Pin Tool is designed for removing and installing the hinge pins on both port and starboard sides of MerCruiser sterndrive bell housings. It is compatible with a wide range of models, including Alpha One (Gen I & II), Bravo (I, II, & III), MC 1, R, and MR sterndrives, ensuring broad application for many boat repair and maintenance tasks. It serves as a direct replacement for multiple OEM and aftermarket part