Abstract: On vehicles such as snowmobiles or other devices utilizing a internal combustion engine, it is usual to provide a throttle lever which is squeezed to open the throttle and released to close the throttle. Various forms of engine kill mechanisms are provided to stop the engine when the throttle pressure is released. These are usually provided with a mechanism for cutting out the kill switch for starting purposes and these are easily by-passed. The present device includes a relatively simple construction having a lever which can be positioned in many locations so that it is actuated by squeezing the throttle lever. An override is provided for starting purposes which is automatically released when the throttle is squeezed and cannot be by-passed.