A dealer here has a new 2006 48 inch Tiger Cub with a 24 hp Briggs engine that he is selling for $5600 plus tax. The same mower with a 19 hp Kawasaki engine is selling for $6600 plus tax. Is there something wrong with the Briggs engine? I mow 2.5 acres/week now but may take on several additional yards later. I really like the mower but question the engine.