Replacement Muffler Assembly 577953501 for compatible backpack leaf blowers Overview This muffler assembly, part number 577953501, is a direct replacement designed to restore proper exhaust function for compatible backpack leaf blowers. It is intended as a likeforlike replacement for worn, damaged, or corroded mufflers and replaces part numbers 576590901 and 585044201. Key benefits Restores exhaust performance and noise control: Replaces a damaged muffler to the blower to expected exhaust flow and attenuate excessive exhaust noise. Direct fit for listed models: Matches original equipment dimensions and mounting points for straightforward replacement and correct alignment. Minimizes downtime: Keeps machines in service by providing the correct replacement part for routine maintenance or . Consistent replacement part number: Uses part number 577953501 to simplify parts ordering and inventory tracking. Compatibility Compatible with these backpack leaf blower models: Husqvarna 560BFS, 560BTS, 580BFS, 580BTS Also compatible with: Redmax EBZ6500, EBZ7500, EBZ8500 Replaces part numbers: 576590901 and 585044201 Function and performance Function: Muffler assembly for exhaust gas routing and noise suppression on compatible backpack blowers. Performance: Designed to match the original equipment specifications for size, fit, and exhaust characteristics to maintain proper engine behavior and noise levels when installed correctly. Installation and maintenance notes Designed as a direct replacement for the listed models; use existing mounting points and follow the equipment service manual for correct installation and torque settings. Inspect gaskets, mounting hardware, and nearby components during installation and if worn. Installation is typically performed during routine maintenance or when the original muffler is damaged, clogged, or leaking. Practical use scenarios Landscape contractor replacing a damaged muffler on a Husqvarna 580BFS after extended field use to restore proper exhaust flow and reduce noise for operator comfort. Municipal maintenance crew stocking the part to perform seasonal service on Redmax EBZseries blowers and reduce machine downtime. Small engine keeping this assembly on hand to quickly service customers with the listed model blowers and equipment to service the same day. Compatibility note Use part number 577953501 to confirm fit for your blower model before . This description reflects the supported models and replacement part numbers provided for this muffler assembly.