307480 – Flywheel Crankshaft Key for Johnson/Evinrude Outboards (10–300 HP)

The 307480 Flywheel Crankshaft Key is a genuine OEM part designed for Johnson and Evinrude outboards ranging from 10 to 300 HP. Manufactured to precise factory standards, this key ensures proper alignment and secure coupling between the crankshaft and flywheel—crucial for smooth engine performance.

You’ll find this key compatible with a wide range of motors built from the 1950s through 2012, including many still in service today. More than 5,900 Johnson/Evinrude outboards use this same flywheel key, making it a trusted and easily replaceable component.

Fitment examples include:

• 10–300 HP models

• Vintage outboards from the 1950s to the early 2000s

This flywheel key installs in seconds, restoring crankshaft-to-flywheel alignment to factory spec. It helps prevent timing errors, balance issues, and crankshaft damage. For continued reliability, especially after flywheel replacement or service, this OEM key is a must-have.

Key Features:

• Part Number: 307480 (also cross-referenced with 0307480)

• OEM flywheel key for Johnson / Evinrude outboards

• Fits engines rated from 10 to 300 HP, vintage and modern

• Over 5,900 compatible models across decades

• Ensures precise crankshaft alignment and secure flywheel fit

• Durable, precisely machined construction

At Arizona Outboard Dismantlers, we offer reliable OEM parts backed by expertise in Johnson / Evinrude maintenance. The 307480 Flywheel Key is a dependable replacement that keeps your engine running smoothly.