Product Description 9-63965 - Aftermarket Yamaha 6J8-11181-A1 Head Gasket For Yamaha 25HP (3 cyl) (1997-02), 30HP (1987-02) Replaced by - 18-3829, 34920, 6J8-11181-00, 6J8-11181-A0, 6J8-11181-A1 and 6J8-11181-A2