A control assembly for controlling a drive mode of a walk-behind lawn mower, said control assembly comprising: a casing attachable to a handle assembly; a first lever operatively connected to said casing and extending outwardly from a lateral side of said casing, said first lever being rotatable between a first operative position and a second operative position relative to said casing; a second lever operatively connected to said casing and extending outwardly from an opposing lateral side of said casing than said first lever, said second lever being rotatable between a first operative position and a second operative position relative to said casing; a plurality of transmissions operatively connected to said first and second levers (38, 40), said plurality of transmissions being operatively connectable to front wheels and rear wheels;wherein actuation of both said first lever and said second lever from said first operative position to said second operative position produces an all-wheel-drive mode in which said front wheels and rear wheels are driven by at least two of said transmissions (200, 210); characterized in that: said casing is formed of an upper housing and a lower housing; said first lever includes a first positioning boss; said second lever includes a second positioning boss; a first spring latch attached to said first lever, wherein said first spring latch selectively engages said second positioning boss; a second spring latch attached to said second lever, wherein said second spring latch selectively engages said first positioning boss; and wherein said first spring latch engages said second positioning boss and said second spring latch engages said first positioning boss when said first lever and said second lever are both positioned in said second operative position such that said all-wheel-drive mode is maintained by continuously actuating only one of said first lever or said second lever in said second operative position. a casing attachable to a handle assembly; a first lever operatively connected to said casing and extending outwardly from a lateral side of said casing, said first lever being rotatable between a first operative position and a second operative position relative to said casing; a second lever operatively connected to said casing and extending outwardly from an opposing lateral side of said casing than said first lever, said second lever being rotatable between a first operative position and a second operative position relative to said casing; a plurality of transmissions operatively connected to said first and second levers (38, 40), said plurality of transmissions being operatively connectable to front wheels and rear wheels;wherein actuation of both said first lever and said second lever from said first operative position to said second operative position produces an all-wheel-drive mode in which said front wheels and rear wheels are driven by at least two of said transmissions (200, 210); characterized in that: said casing is formed of an upper housing and a lower housing; said first lever includes a first positioning boss; said second lever includes a second positioning boss; a first spring latch attached to said first lever, wherein said first spring latch selectively engages said second positioning boss; a second spring latch attached to said second lever, wherein said second spring latch selectively engages said first positioning boss; and wherein said first spring latch engages said second positioning boss and said second spring latch engages said first positioning boss when said first lever and said second lever are both positioned in said second operative position such that said all-wheel-drive mode is maintained by continuously actuating only one of said first lever or said second lever in said second operative position. said casing is formed of an upper housing and a lower housing; said first lever includes a first positioning boss; said second lever includes a second positioning boss; a first spring latch attached to said first lever, wherein said first spring latch selectively engages said second positioning boss; a second spring latch attached to said second lever, wherein said second spring latch selectively engages said first positioning boss; and wherein said first spring latch engages said second positioning boss and said second spring latch engages said first positioning boss when said first lever and said second lever are both positioned in said second operative position such that said all-wheel-drive mode is maintained by continuously actuating only one of said first lever or said second lever in said second operative position.