briggs and stratton vertical engine 19 hp 540cc 1" x 3-5/32" #33r877-0029 briggs & stratton mounting holes are not threaded. use your existing bolts from your old engine, as the manufacturers use self-threading bolts upon installation. this genuine 540cc briggs & stratton single cylinder engine offers dependable power for your equipment needs. with a power rating of 19 horsepower, this engine features a premium dual clean air filtration system, electric starter, and maintenance-free magnetron electronic ignition. with a manufacturer limited warranty of 2 years consumer use / 1 year commercial use, briggs & stratton provides power that you can trust. this engine includes a dura-bore cast iron cylinder sleeve for extended life. this engine includes an installed muffler. this engine includes a 9 amp charging system.