64E-4387A-00 – O-Ring – Yamaha

The 64E4387A00 o-ring is a genuine OEM Yamaha sealing ring used in various outboard applications. This small but important part helps create a tight seal where two components join. It prevents water, fuel, or oil from leaking at pressure points in your engine or trim and tilt assemblies. Because it’s a factory-exact part, the o-ring fits properly in compatible Yamaha systems without guesswork.

This o-ring often serves in places that require a reliable seal under vibration and movement. It sits in grooves and compresses slightly when installed to block fluid or air from escaping. If your original o-ring wears out, becomes brittle, or cracks, fuel leaks and water ingress can occur. Replacing it with the 64E4387A00 o-ring restores the proper seal and helps your outboard run more reliably.

Because o-rings are exposed to heat, salt, and fuel, they can age over time. Frequent maintenance checks help you spot worn seals before they cause bigger problems. This o-ring works with other seals and gaskets in carburetors, fuel pumps, trim systems, and other engine parts. It ensures performance stays consistent while out on the water.

Install this part anytime you service your engine’s seal system or rebuild a component that uses Yamaha’s 64E series o-rings. It offers simple maintenance that prevents leaks and keeps your boat performing smoothly. Shop at Arizona Outboard Dismantlers to keep your outboard running strong and ready for the water.