Abstract: A running tool for setting a casing hanger packoff in a subsea well has a connection assembly that connects the running tool to the casing hanger. The running tool has a mandrel which connects to a string of drill pipe. A setting sleeve is carried by the mandrel for carrying the packoff. The mandrel carries a body also. The body has a split ring which moves between an extended position engaging a groove located in the casing hanger to a retracted position. The split ring moves between the engaged and retracted positions by longitudinal movement of an annular cam. The cam is threaded to the body, and when rotated, will move longitudinally. The mandrel extends through the cam and has a longitudinal slot. A dog engages the slot in the mandrel. A flexible link connects the dog to the cam so that rotation of the mandrel rotates the cam. The dog is biased by the flexible link to allow the slot to move downward below the dog when the mandrel moves to the packoff setting position.