Abstract: A lock mechanism for push lawn mowers of the type having a secondary operations handle which must be moved into a position adjacent the lawn mower handle in order to engage the starting mechanism of the lawn mower, the apparatus comprising at least a first and second body members joined at a hinged portion, each body member formed into a substantial semi-circular pattern for defining a channel in each body member, so that as the body members are moved from the open to the closed position, the channels would define a circular bore through the body members that would encircle the primary handle of the lawn mower; a tab at the end of each of the body members, a tab having an opening there through, so that when the body members are closed, the openings in the tab align for accommodating a padlock therethrough, the body members once engaged around the handle of the lawn mower define a barrier which the second handle would engage when pulled towards the primary handle, so that the secondary handle is prevented from