87533-ZW5-010 Muffler Mark - Overview. The 87533-ZW5-010 Muffler Mark is a crucial genuine Honda OEM replacement part designed for the Honda marine engine exhaust system. It plays an essential role in dampening exhaust noise and ensuring the smooth and quiet operation of the engine. Manufactured to meet factory specifications, the Muffler Mark integrates flawlessly within the exhaust system, maintaining optimal performance and durability of the marine engine system.. Key Features. Genuine Honda