Remove the bolts holding the pulley cover from the engine, using a socket and ratchet. Most Briggs & Stratton engines use three 3/8-inch bolts.
Lift the pulley cover off the engine and turn it over.
Hold the housing in one hand and grasp the cord with the other. Pull the cord all the way out of the housing as far as possible until the end of the cord on the pulley is lined up with the hole in the housing.
Release the tension on the cord slowly. Let the cord rewrap itself around the pulley as the cord is retracted.
Turn the housing back over and reattach it to the engine.