663-44553-00 – COVER, LOWER MOUNT – Yamaha

The 663-44553-00 Yamaha cover is a lower mount cover used on specific Yamaha outboard motors. It protects the lower engine mount area from dirt, debris, and wear. This part fits near the powerhead or mount brackets on 2-stroke and 4-stroke outboards where a protective cover helps keep components clean and free from corrosion. OEM listings show this is the correct lower mount cover (superseded by part 663-44553-01-8D).

Lower mount covers help protect structural mount points on outboards. Without them, vibration and saltwater exposure can accelerate wear on the mounting surfaces. The 663-44553-00 Yamaha cover snaps or bolts into place over the lower mount area to shield exposed hardware. This protection matters because corrosion or road rash near the engine mount can weaken the connection between the engine and boat transom.

When a mount cover cracks, fades, or breaks off, you may see exposed metal or fasteners. Dirt can build up around fasteners and accelerates corrosion. A damaged cover also makes the engine bay look worn or unfinished. Replacing it with the Yamaha cover restores a clean, protected look and helps maintain long-term engine health. Transitioning to a fresh cover reduces debris buildup and prevents premature wear on mount hardware.

Shop at Arizona Outboard Dismantlers to keep your outboard running strong and ready for the water.