Yamaha 90890-56008-00 Marine Outboard 700 Series Key

The Yamaha 90890-56008-00 is a genuine OEM replacement key — cut #732 — designed as a direct fitment component for compatible Yamaha marine outboard engines. There's no aftermarket compromise here: Yamaha manufactures this key to the same specifications as the original, meaning the cut depth, blade profile, and tumbler engagement geometry are matched to the ignition switch it was designed for. For outboard owners dealing with a lost, broken, or worn key, using the OEM part eliminates the tolerance variability that aftermarket blanks introduce, which matters in a marine ignition switch that sees corrosion, vibration, and repeated use across a season.

Practically speaking, this is a small part with an outsized consequence if you don't have it — a lost outboard key on the water means a tow. The single-unit sale format makes it easy to order a spare to keep aboard or at the dock. Construction is standard key metal with the Yamaha part number stamped for identification. The fitment caveat is real and worth repeating: the #732 cut number applies to a specific subset of the Yamaha outboard lineup, not the entire range. Cross-reference your engine's model and serial number against Yamaha's parts diagram, or check the number stamped on your existing key, before placing an order — it's the one step that separates a five-minute fix from a return shipment.