Hinge Pin Tool – Fits Mercury Mercruiser Alpha One, Gen II & Bravo Sterndrives (Replaces 91-78310, 18-9861)
This hinge pin removal and installation tool is designed for use with Mercury Mercruiser sterndrives including Alpha One, Alpha One Gen II, Bravo I, II & III, MC-1, R, and MR models from 1975 to the present. It facilitates the removal and installation of hinge pins from drive units, specifically targeting hinge pin bolts that separate the housing from the gimbal ring.
Direct replacements for this tool include Mercury part number 91-78310, Sierra 18-9861, GLM 90200, and Mallory 9-79805, making it a versatile choice for maintenance and repair tasks.
- Includes 1x hinge pin tool (91-78310/18-9861)
- Hand tool designed for use with a ratchet or breaker bar
- Compatible with multiple Mercury Mercruiser sterndrive models spanning decades
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Mercury | 91-78310 |
| Sierra | 18-9861 |
| GLM | 90200 |
| Mallory | 9-79805 |
