Michigan Wheel Aluminum Propellers For Mariner & Mercury Outboard Engines. Mercury & Mariner Application Chart (opens in new window) 4-10 HP Thru Hub Exhaust & 8 Tooth Spline 25-30 HP Thru Hub Exhaust & 10 Tooth Spline 6-15 HP Thru Hub Exhaust & 8 Tooth Spline MODELS 402-500 (1974-76), 650, 60 HP Thru Hub Exhaust & 13 Tooth Spline MERC 20 Thru Hub Exhaust & 8 Tooth Spline 25-70 HP Thru Hub Exhaust & 13 Tooth Spline 9.9-25 HP Thru Hub Exhaust & 10 Tooth Spline 40-140 HP Thru Hub Exhaust & 15 Tooth Spline 15-25 HP Non-Thru Hub & Pin Drive 135-300 HP • V-6 GEARCASE Thru Hub Exhaust & 15 Tooth Spline