An agricultural harvester comprising: a header and feeder drive system for operating a header and a feeder housing, including a forward belt drive arrangement (82, 182) having a forward drive belt (86, 186) arranged about a first pulley and a second pulley and a forward belt drive tensioner (106, 206) connected to an actuator (104, 204) for selectively engaging and disengaging said forward drive belt (86, 186) with said first pulley and said second pulley; and a reverse belt drive arrangement (84, 184) comprising: a reversing motor (100, 200) having a reversing motor pulley (98, 198) selectively drivingly coupled to and decoupled from said header and feeder drive system; a reverse drive belt (96, 196) arranged around said reversing motor pulley (98, 198) and said second pulley; and a reverse belt drive tensioner (108, 208) for engaging and disengaging said reverse drive belt (96, 196) with said reversing motor pulley (98, 198) and said second pulley; and the header and feeder drive system further comprising a linkage system (110, 210) interconnecting said forward belt drive tensioner (106, 206), said reverse belt drive tensioner (108, 208) and said actuator (104, 204) for operating both said forward belt drive tensioner (106, 206) and said reverse belt drive tensioner (108, 208) with said actuator (104, 204) for selectively engaging either the forward belt drive arrangement (82, 182) or the reverse belt drive arrangement (84, 184); characterized in that said linkage system includes a reverser arm rotatable about a pivotal connection; and said reversing motor is carried by said reverser arm a header and feeder drive system for operating a header and a feeder housing, including a forward belt drive arrangement (82, 182) having a forward drive belt (86, 186) arranged about a first pulley and a second pulley and a forward belt drive tensioner (106, 206) connected to an actuator (104, 204) for selectively engaging and disengaging said forward drive belt (86, 186) with said first pulley and said second pulley; and a reverse belt drive arrangement (84, 184) comprising: a reversing motor (100, 200) having a reversing motor pulley (98, 198) selectively drivingly coupled to and decoupled from said header and feeder drive system; a reverse drive belt (96, 196) arranged around said reversing motor pulley (98, 198) and said second pulley; and a reverse belt drive tensioner (108, 208) for engaging and disengaging said reverse drive belt (96, 196) with said reversing motor pulley (98, 198) and said second pulley; and the header and feeder drive system further comprising a linkage system (110, 210) interconnecting said forward belt drive tensioner (106, 206), said reverse belt drive tensioner (108, 208) and said actuator (104, 204) for operating both said forward belt drive tensioner (106, 206) and said reverse belt drive tensioner (108, 208) with said actuator (104, 204) for selectively engaging either the forward belt drive arrangement (82, 182) or the reverse belt drive arrangement (84, 184); a reversing motor (100, 200) having a reversing motor pulley (98, 198) selectively drivingly coupled to and decoupled from said header and feeder drive system; a reverse drive belt (96, 196) arranged around said reversing motor pulley (98, 198) and said second pulley; and a reverse belt drive tensioner (108, 208) for engaging and disengaging said reverse drive belt (96, 196) with said reversing motor pulley (98, 198) and said second pulley; and the header and feeder drive system further comprising a linkage system (110, 210) interconnecting said forward belt drive tensioner (106, 206), said reverse belt drive tensioner (108, 208) and said actuator (104, 204) for operating both said forward belt drive tensioner (106, 206) and said reverse belt drive tensioner (108, 208) with said actuator (104, 204) for selectively engaging either the forward belt drive arrangement (82, 182) or the reverse belt drive arrangement (84, 184); characterized in that said linkage system includes a reverser arm rotatable about a pivotal connection; and said reversing motor is carried by said reverser arm