Remove the Murray's spark plug wire by hand.
Use an adjustable wrench to remove the lever casing from the handle of the mower.
Trace the end of the cable to the carburetor control arm. Use the pliers to remove the end of the cable from the control arm linkage. Dispose of the old cable and lever.
Insert the end of the new cable into the carburetor control arm hole and bend the end of it down to hold it in place.
Attach the new lever to the handle of the mower with the adjustable wrench and then reconnect the spark plug wire.