Mercury - Clutch sliding 6 Jaw- 52-8M0142871 Fits: 175, 200, & 225hp 3.4L V6 serial numbers (2B529482 & up) 200hp 3.4L V6 SeaPro serial numbers (2B529482 & up) 200, 225, 250, and 300hp 4.6L V8 Pro XS serial numbers (2B529482 & up) 250 & 300hp 4.6L V8 serial numbers (2B529482 & up) 200, 225, & 250hp Verado 6 cyl serial numbers (2B144123 & up) 275 & 300hp Verado 6 cyl serial numbers (2B144123 THRU 2B578935) 350hp 2.6L L6 Pro Verado serial numbers (2B141124 & up) 350hp 2.6L L6 Verado serial numbers (2B141617 & up) 400hp 2.6L L6 Racing serial numbers (2B141124 & up) 400HP 2.6L L6 Verado serial numbers (2B618256 & up) 225, 250, & 300hp 4.6L V8 SeaPro serial numbers (2B529482 & up) 250R, 350R 4.6L V8 Racing serial numbers (1E080500 & up) 400R & 450R 4.6L V8 Racing serial numbers (1E083006 & up) 300R 4.6L V8 AMS Racing serial numbers (1E081459 & up) 250 & 300hp 4.6L V8 Verado serial numbers (2B529482 & up) 300hp 4.6L V8 Verado SeaPro serial numbers (2B529482 & up)