Brand Part Number Johnson/Evinrude 377178 / 0377178 / 775519 / 0775519 / 777833 Sierra 18-3003 GLM 89670 Mallory Marine 9-45218 / 9-45218-10 SEI Marine 96-361-03BE CEF 500349
especially on startup or when turning
and perform a final leak inspection
This seal should be replaced whenever the gimbal bearing is replaced
Refill coolant and check for leaks before restarting the engine
U Joint Yoke Oil Seal – Fits MerCruiser Bravo I II III Blackhawk (Replaces 26-807006, 26-18816, 86730) GMC Brand Part Number Johnson/Evinrude 377178Product Details This U Joint Yoke Oil Seal is designed for MerCruiser Bravo I, II, III, and Blackhawk sterndrives from 1988 and up. Compatible with Bravo I, Bravo II, and Bravo III models beginning at serial range 0B664190 & Up, as well as Blackhawk units from 19941995 (serial range 0F186717 & UP), this seal delivers reliable protection for your sterndrive's U joint yoke assembly. Direct replacement for OEM part numbers 26 807006, 26 18816, and 86730,