Genuine Yamaha Inner cover, exhaust
About this part
This page covers the genuine Yamaha part 664411110000 (Inner cover, exhaust). It’s an original OEM component designed to match Yamaha’s factory tolerances for correct fit, reliable function, and long service life in marine conditions.
Why choose genuine Yamaha?
Choosing genuine Yamaha OEM helps avoid problems often seen with pattern parts: mis-sized sealing profiles, inconsistent rubber compounds, poor plating, and connectors that don’t lock correctly. On a marine engine, those small differences can become big issues.
Notes for this part
This is a genuine Yamaha OEM component intended for service and repair work on compatible Yamaha products. OEM specification supports correct fit, correct function, and consistent quality.
If you’re unsure it’s correct for your engine, confirm using your exact model code/serial range and the relevant parts diagram before ordering.
Warranty
New genuine parts include a 1-year warranty (correct application and installation required).
Ordering tips
Ordering tip: if you’re mid-repair, check the diagram for one-time-use seals, O-rings, and fasteners listed next to this part so you can complete the job without delays.