The MTD 987-02420 Idler-Arm Assembly operates with 33-inch cutting decks on lawn mowers. This assembly operates to achieve the tension on the mower deck belt. The idler arm components show damage which causes belt slippage and poor cutting performance during regular use. This part restores proper belt tension when installed which enables consistent blade speed and an even cut. The replacement of this part delivers enhanced cutting performance while decreasing belt damage and slippage and enhancing deck operation and extending the durability of all related components which results in lawn maintenance.
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