I'm bummed. I was unwinding today after work, mowing the lawn when the engine let go. There's a big crack in the side of the block so I know it's toasted. I have a Briggs and Stratton 12.5 hp. Model 286702-4515-E1. Here's a link: http://www.northerntool.com/webapp/...?storeId=6970&productId=200133274&R=200133274 It's mounted on an older Bunton 48" walkbehind. Should I get this engine as a replacement? Or should I explore one with more horsepower or other brands? What other brands/model will have the same dimensions as far as mounting and shaft dimensions?