17390-ZW4-H00 Muffler Cover - Overview. The 17390-ZW4-H00 Muffler Cover is an essential component of Honda marine engine systems. It protects the exhaust muffler from environmental damage, ensuring that your marine engine operates safely and reliably. This muffler cover is designed to match factory specifications, ensuring seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine Honda OEM muffler cover designed specifically for Honda marine engines.. Protects the exhaust system from environmental damage and wear.. Manufactured to exact factory specifications for perfect fit and function.. Enhances the safe operation of the marine engine by shielding the muffler.. Constructed with durable materials to withstand marine conditions.. Integrates cleanly with existing hardware, seals, and housings to maintain system integrity.. Why Choose Genuine OEM. Using original Honda parts like the 17390-ZW4-H00 Muffler Cover preserves the integrit