Abstract: An inventive device to aid mobility-limited users of gasoline-powered handheld tools while crank-starting of same is disclosed. In particular, the invention is a tethering device to prevent a tool such as a chainsaw from jumping or kicking back when crank-started by an operator with limited bodily mobility, particularly of the back, preventing placing of the tool on the ground for crank-starting. The inventive tethering device allows the operator to remain upright while safely cranking the on-board engine. The inventive device comprises an elongated tether member having first and second ends, a foot placement member for placement of the operator's foot to secure the device and restrain its movement, affixed to the first end and an attachment means for attaching the tether to a chainsaw, affixed to the second end of the elongated tether member.