Ans. The deck belt is a v-belt that goes around several pulleys at the very front of the mower. They're commonly used to keep Guards, coverings, and shrouds hidden. Use a spring pulley to keep it taut. The "drive belt" is the only belt left on the mower once the "mower deck belt" has been removed, and its sole purpose is to turn the blades. The blades are linked to the drive belt that drives them.