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Yamaha

Yamaha 90890-56008-00 Marine Outboard 700 Series Key

★★★★★4.5 (87 reviews)

The genuine OEM #732 Yamaha marine key — exact-fit replacement for your outboard, no machining or modification required.

$19.46*
✓ In Stock on Amazon.com
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

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.

Key Features

SKU: 90890-56008-00

Sold Each

Please verify your own fitment

Specifications

SKU
90890-56008-00
Unit Sold
Each

Pros & Cons

👍 Pros

  • Genuine OEM construction ensures the key cut matches the ignition tumbler precisely, with no tolerance variation that can cause ignition wear or starting hesitation over time.
  • Sold individually, so you're not paying for a set when you only need a single replacement or spare.
  • The OEM part number (90890-56008-00) makes reordering straightforward through any authorized Yamaha dealer or parts supplier.
  • Compact and lightweight — carries easily as a backup on any keychain or stored in a boat's dry storage compartment without adding bulk.

👎 Cons

  • Fitment is not universal — this key covers a specific cut (#732) and model range, and ordering without verifying your engine's compatibility is the most common source of returns.
  • No key float, buoy, or lanyard is included, which is a practical oversight for a marine key that, if dropped overboard, is immediately lost.
  • Standard hardware stores cannot duplicate this key blank, meaning you're dependent on a Yamaha dealer or marine locksmith for additional copies.
  • Sold as a single key with no spare, which leaves you without redundancy if this is your only copy and it's lost or damaged on the water.

Frequently Asked Questions

The part number 90890-56008-00 designates the #732 key cut, which fits a specific range of Yamaha outboards. Check your existing key for a stamped number or consult your engine's parts diagram using the model and serial number on the engine's serial plate before ordering — Yamaha's parts system is cut-specific, not universal across the outboard lineup.
This is a genuine OEM Yamaha component, manufactured to Yamaha's specifications for fit, form, and function. That means the key blank, cut depth, and tumbler engagement are spec-matched to the original — aftermarket alternatives can vary in tolerance and occasionally cause ignition switch wear over time.
The #732 key operates the ignition/start function on compatible Yamaha outboards. Whether it also operates a helm panel switch or secondary lock depends on your boat's configuration — some installations use a single key for both the panel and engine; others are keyed differently. Verify your boat's keying setup before assuming one key covers all locks.
Standard hardware stores generally cannot cut Yamaha marine keys — the blank profile is specific and not commonly stocked. Yamaha dealers and specialized marine locksmiths are the reliable sources for duplicates. Ordering a second OEM key now is a practical precaution against being stranded without a spare.

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