A-B1821295-AI SHIM-END PLAYOne New Aftermarket Replacement Crankshaft End Play Shim Fits Briggs and Stratton Small Engines This crankshaft end play shim (standard) is used during engine assembly or rebuild to set proper crankshaft end play clearance. Correct end play is critical to engine longevity too much clearance causes premature bearing wear, while too little can bind the crankshaft. This shim fits most Fits Briggs and Stratton (B&S) engines in the 430000, 432000, 433000,