6E5-21770-03-00 Oil Tank Cap Assembly, Replacement Fuel Cap Compatible with Yamaha Outboard Watercraft

This oil tank cap assembly is a replacement compatible with Yamaha part number 6E5-21770-03-00, also marked as simplified part code 6E5217700300. This brand-new twist-on reservoir cap measures 3 x 3 x 2 inches in dimension, single pack for direct replacement of your original worn factory cap, specially engineered for marine watercraft outboard remote oil tank systems. Crafted with two-layer premium construction, the outer body adopts thickened black anti-corrosion plastic paired with built-in stainless steel sealing liner. The composite material delivers outstanding resistance to coastal salt spray, seawater moisture and two-stroke engine oil erosion. The exterior features integrated multi-rib anti-slip gear design, which greatly boosts friction when twisting the cap open or closed. Even if your hands are soaked with seawater or coated with slippery engine oil during boat maintenance, you can grip and operate the cap effortlessly without slipping off. Standard matching thread structure realizes plug-and-play DIY installation, no cutting, grinding or extra gaskets required; simply unscrew the old cap, clean tank mouth residue, then twist this new cap tight to finish repair within minutes. This oil tank cap is compatible with Yamaha 2.8 Gallon (10.5L) remote outboard oil tank equipped with oil pump and sensor, and compatible with Yamaha 2-stroke 115HP & 130HP outboard motors including model series 115ETL, 115ETX, 130TLRB, 130TXRC. It serves as an ideal substitute for cracked, brittle, thread-stripped, faded or completely lost original caps, widely applicable on fishing boats, speedboats and all small marine vessels with separate external oil reservoir. Before placing your order, please double-check the part number printed on your original oil tank cap to confirm compatibility and avoid mismatch returns. If you have any confusion about model matching, installation steps or sealing issues after receiving the product, do not hesitate to reach out to our customer support team for professional guidance at any time.

• This oil tank cap is compatible with yamaha outboard 2 cycle oil reservoir cap 6E5‑21770‑03‑00 / 6E5217700300, precise thread for direct bolt‑on installation without cutting or adjustment.
• Built with heavy‑duty corrosion‑resistant plastic housing and premium inner sealing gasket. Great resistance against seawater salt spray, moisture and two‑stroke engine oil, stops oil leaking and volatile loss during long‑term marine service.
• Feature multi‑rib anti‑slip outer structure. You can twist tight or take it off conveniently even when hands are wet or covered with oil. User‑friendly design for fishing boats, speedboats and other offshore working watercraft.
• Ideal replacement solution for broken, cracked, thread‑stripped, worn‑out or missing factory caps. Fits compatible‑Yamaha 2‑stroke 115HP,130HP outboard motors that match external remote oil reservoir system.
• Practical budget‑saving spare accessory for private boat owners and marine repair workshops. Brings back stable leak‑proof sealing. Please verify your original part number to confirm compatibility before order placement.