Briggs Stratton 19N132-0051-F1 306cc 1450 Series Horizontal Engine, 3/4-inch x 2.51-inch Crankshaft, 3/16-inch Key, 3/8-24 Tapped, Direct Replacement for 20S232-0063-F1. Shop our Horizontal engine collection. SAVE UP TO 30% OFF. Price Match Guarantee, Easy Returns and We ship worldwide.