Replacement idler pulley for Murray and Scotts Ranch King mowers with 38 in, 40 in, and 42 in decks Function and benefits Maintains belt tension for drive belts, resulting in smoother mower operation and improved cutting efficiency Designed to worn or damaged pulleys on compatible mower decks, helping restore consistent blade performance Compatibility Fits Murray and Scotts Ranch King models with 38 in, 40 in, and 42 in decks Compatible part numbers: 91179, 421409, 0091179, 091179, 91179MA, 421409MA, 091179MA, MY91179 Construction and durability Made from robust plastic and metal materials to withstand common lawn maintenance conditions Built for extended use across multiple mowing seasons Installation Straightforward, easytoinstall design for quick replacement Requires no professional assistance for installation Practical use scenarios Scenario 1: a worn idler pulley on a 42 in deck Murray mower to restore belt tension, ensuring consistent cutting performance and blade speed Scenario 2: Maintain multiple Murray or Scotts Ranch King mowers that share the same compatible deck sizes by stocking a single pulley for various configurations Scenario 3: Perform routine seasonal maintenance to reduce belt slip and extend the life of the drive belt on moderate to heavy mowing tasks Attributes at a glance Function: drive belt tensioner idler pulley Deck compatibility: 38 in, 40 in, 42 in decks Models: Murray and Scotts Ranch King Part numbers: 91179, 421409, 0091179, 091179, 91179MA, 421409MA, 091179MA, MY91179 Material: plastic and metal Performance: supports smooth operation and efficient cutting