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The BRIGGS STRATTON 82-131 is a spindle assembly designed as a direct replacement for MTD part 918-06991. The spindle assembly is a core cutting-deck component that holds and drives the mower blade. It mounts to the deck housing and transmits rotational force from the belt-and-pulley system down to the blade. Licensed technicians and experienced service professionals working on outdoor power equipment install this part during routine deck maintenance, blade-strike recovery, or when a worn or seized spindle causes excessive vibration or uneven cutting.
This spindle assembly is suited for lawn and garden equipment applications where the OEM part 918-06991 is specified. It is a practical replacement for residential and light commercial mowing decks that require restoration of proper blade engagement and cutting performance. Service shops handling MTD-platform equipment will find this part useful for keeping machines in operational condition across seasonal maintenance cycles.
Designed as a replacement for MTD part 918-06991. Verify fitment against your equipment model number before installation.
Spindle assemblies are typically installed by outdoor power equipment technicians. Before beginning work, disconnect the spark plug wire and remove all power sources to prevent accidental blade engagement. Standard hand tools are required to remove the blade, pulley, and mounting hardware. Inspect the surrounding deck area, belt, and pulley for wear or damage and replace as needed before reinstalling the new spindle assembly.
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