Yamaha - Oil Warning Unit Engine Monitoring Component 7CN-H5690-00-00. Overview. This is one of those parts you hope you never hear from-but when you do, it matters. The oil warning unit is there to alert you before small issues turn into major engine damage. I've seen engines saved just because this system did its job in time. It's a quiet safeguard that gives you peace of mind every time you're out on the water.. Key Features. • Critical Oil Level Monitoring - Detects low oil conditions to help protect the engine from damage.• Early Warning Alerts - Triggers alerts so you can act before serious issues develop.• OEM System Integration - Designed to work seamlessly with Yamaha engine monitoring systems.• Reliable Sensor Function - Built for consistent performance in marine conditions.. Engine & Boat Compatibility. Designed for Yamaha outboard engines equipped with oil monitoring systems. Commonly used across a range of Yamaha outboards where real-time oil level detection is essential f