Craftsman 28851 Manual. The Craftsman model 218851 is a 42″ riding mower with a 21 hp engine. You can view or download the Craftsman 28851 manual below and even print it out if you need to. Model 917.288541 made by Sears Craftsman for Lawn and Garden. You can also find Craftsman 28851 parts directly from Sears Parts Direct by clicking here.