Yamaha - Oil Cooler Assembly Engine Cooling Component 8ES-13470-09-00. Overview. Heat is one of the biggest enemies of engine life, especially when you're running long or pushing hard. I've seen engines lose efficiency or start showing wear just because oil temps weren't being managed well. The Yamaha Oil Cooler Assembly 8ES-13470-09-00 helps keep oil temperatures in check so everything stays properly lubricated. It's a key part of keeping your motor running strong and lasting longer.. Key Features. • Regulates Oil Temperature - Helps keep engine oil within optimal operating range.. • Supports Engine Longevity - Reduces heat-related wear on internal components.. • Yamaha Engineered Fit - Designed to integrate with factory cooling and oil systems.. • Efficient Heat Exchange Design - Transfers heat away from oil effectively under load.. • Durable Marine Construction - Built to withstand corrosion and continuous operation.. Engine & Boat Compatibility. The Yamaha Oil Cooler Assembly 8ES-1