This product has been superseded by: 91490-30030-00. Yamaha Cotter Pin - 91490-30025-00. A tiny pin can save you from an expensive tow. This genuine Yamaha 3 mm × 25 mm cotter pin locks castle nuts and clevis joints so they stay put when the seas kick up. Formed from marine-grade stainless, it resists salt corrosion and repeated bending, making it a dependable backup for steering links, propeller nuts, and trim-tab hardware. The chamfered tip slips easily through pre-drilled holes, and the pre-split legs spread smoothly with a quick squeeze of pliers-no wrestling, no frayed ends.. Why it belongs in every onboard toolkit. Exact OEM size: 3 mm diameter and 25 mm length match Yamaha castle-nut specs-no trimming or oversized play.. Stainless resilience: fights rust and pitting after months in a wet bilge.. Smooth install: tapered tip and even splits speed up roadside-style fixes at the dock.. Reusable strength: keeps its shape after multiple removals, unlike cheap hardware-store pins.. Swa