Thru HUB exaust, 12 tooth spline.

For:
Mariner/Mercury 8/9.9 (4-Stroke) 2005 and Newer 48-897618A10
Evinrude/Johnson 9.8 (4-Stroke) 2012 and Newer 5040538
Nissan/Tohatsu 8/9.9 (4-Stroke) 2005 and Newer 3B2B645151