Description
The Mercury Flywheel Key F85498‑1 is a genuine OEM replacement part designed to ensure precise timing alignment between the flywheel and crankshaft on compatible Mercury Marine outboards. The flywheel key is a small but critical component that helps maintain proper engine timing — essential for smooth starts, reliable performance, and optimal combustion.
This OEM key is manufactured to exact Mercury specifications, ensuring a secure fit and dependable operation. It’s an essential part to replace when performing tune‑ups, repairing outboard starting issues, or after events like a backfire that can shear the original key. Installing a new flywheel key can prevent engine timing drift and maintain proper firing sequences for consistent performance on the water.
Key Features
- OEM Part Number: F85498‑1
- Application: Mercury Marine outboard engines requiring this specific key
- Function: Locks flywheel to crankshaft for accurate ignition timing
- Durable Construction: Made to factory standards for reliable fit and function
- Essential Replacement Part: Ideal during tune‑ups, rebuilds, or after timing issues
Recommended Use
- Routine outboard maintenance and tune‑ups
- Replacements following a backfire or timing misalignment
- Marine engine rebuilds or overhaul projects
- Required for proper ignition timing on compatible Mercury engines
Maintain your engine’s timing and performance with the Mercury Flywheel Key F85498‑1 — a small part with a big role in dependable marine operation.