Yamaha - Oil Tank Lubrication System Component 6J8-21707-01-00. Overview. The oil tank is one of those parts you rely on every time you turn the key, even if you don't think about it. If it starts leaking, cracking, or feeding inconsistently, you're risking the whole motor. I've seen simple tank issues lead to bigger problems just because oil delivery wasn't steady. Keeping a solid tank in place gives you peace of mind that the engine is getting what it needs.. Key Features. Secure Oil Storage - Holds oil safely for consistent delivery to the engine.. Reliable Feed Design - Supports steady oil flow through the lubrication system.. Durable Construction - Built to withstand vibration, heat, and marine conditions.. Factory-Spec Fitment - Designed to match Yamaha systems for proper connection and function.. Leak-Resistant Build - Helps prevent oil loss and maintains system integrity.. Engine & Boat Compatibility. Designed for Yamaha outboard engines with compatible oil injection or lubrica