Yamaha 380 Outboard Replacement Key 90890-55877-00 OEM

The Yamaha 90890-55877-00 is a genuine OEM replacement ignition key for Yamaha marine outboard motors that use the 380-series key pattern. Yamaha outboard ignition systems use a standardized numbered key system — rather than uniquely cut keys — which means each key code corresponds to a specific set of ignition switches across various outboard models. This particular 380-code key is manufactured to Yamaha's original specifications, ensuring the blade profile and cut pattern match the corresponding ignition switch precisely without any aftermarket fitment issues.

This key serves a simple but essential purpose: restoring ignition access when an original key is lost, damaged, or when an owner wants a dedicated spare kept in a separate location. Because it is a genuine Yamaha part, it offers the peace of mind that comes with factory-grade materials and quality control, which matters for a component exposed to salt air, moisture, and regular mechanical stress. The key consideration before purchase is confirming that your outboard's ignition switch uses the 380 key number — this information is typically stamped on your existing key or referenced in the ignition switch documentation. Ordering the correct code is the only step required for a drop-in replacement.