Makita ELM4121 Electric Lawn Mower Belt Replacement | Broken Belt & Seized Bearing

In this video, I replace a broken drive belt on a Makita ELM4121 electric lawn mower. The belt snapped because the upper bearing was seized. I remove the cover, loosen the belt tension bolts, install a new belt, tension it properly, and lubricate the bearing with Würth lubricant. After the repair, the mower is working again. Always disconnect the mower from power before repair or maintenance. Thanks for watching! Please hit the like button and subscribe for more repair videos. #Makita #ELM4121 #LawnMowerRepair #BeltReplacement #ElectricLawnMower #DIYRepair