6-20HP8 Tooth Spline
Fits Japan Origin Mercury/Mariner
9.9-20HP14 Tooth Spline
9.9-25HP10 Tooth Spline
9.9-30HP10 Tooth Spline
Fits Mercury 25-30HP Japan Origin
Fits 25-30HP Mercury/Mariner Japan Origin
25-70HP13 Tooth Spline
"Tohatsu Style"
115HP+15 Tooth SplineLarger Blade Design
115-300HP15 Tooth Spline