6F54111101 Inner Cover, Exhaust — Fit for Yamaha Outboard Motor 2 Stroke 40HP (Old Model) Part Numbers: 6F54111101 / 6F541111 What this part does This inner cover is the originalequipment style exhaust cover for the Yamaha 2stroke 40HP outboard (old model). It seals and protects the internal exhaust passage, helping maintain proper exhaust flow and preventing exhaust leakage into areas that can cause noise, vibration, or component corrosion. Key benefits OEM fit and form: Manufactured to match Yamaha part numbers 6F54111101 and 6F541111 for a direct replacement on applicable 40HP 2stroke Yamaha outboards (old model). Restores sealing and exhaust performance: Replaces worn, cracked, or corroded covers to eliminate exhaust leaks and preserve correct exhaust routing. Durable, serviceready design: Built to the specifications required for reliable marine use, helping extend the life of surrounding components. Simple replacement: Designed for straightforward installation as a direct swap for the original inner exhaust cover, reducing time and effort. Key attributes Functionality: Exhaust inner cover that seals and channels exhaust within the outboard assembly. Compatibility: Specifically for Yamaha Outboard Motor 2 Stroke 40HP (Old Model). Matches OEM part numbers 6F54111101 and 6F541111. Performance: Restores factory exhaust sealing and reduces the risk of exhaustrelated noise, vibration, and moisture damage. Fitment: Direct replacement for the original inner cover; intended to work with the existing exhaust system components on the specified Yamaha models. Typical use cases Replacement during : Swap in this inner cover when the original is cracked, corroded, or otherwise damaged to stop exhaust leaks and restore normal operation. Preventive maintenance: as part of a service to avoid future exhaust issues, especially on older 2stroke 40HP Yamaha outboards that show early signs of wear. Preseason inspection and tuneup: Install this OEMmatching cover when preparing your boat for the season to ensure reliable exhaust sealing and quieter running. Notes for buyers Confirm compatibility with your outboard by checking the model and the original part number. This cover is intended for the Yamaha 2stroke 40HP old model and corresponds to part numbers 6F54111101 and 6F541111. Professional installation is recommended if you are not experienced with outboard maintenance to ensure correct sealing and reassembly.