Yamaha Spark Plug Cap Assembly – 663-82370-01-00

Yamaha Spark Plug Cap Assembly

Keep your outboard’s ignition system firing cleanly with this OEM Yamaha Spark Plug Cap Assembly (Part No. 663-82370-01-00). Designed as a direct replacement for Yamaha outboard engines, this cap assembly seals the connection between the spark plug wire and plug, protecting against moisture, vibration, and electrical interference all common challenges in the marine environment.

A worn or cracked plug cap can cause misfires, hard starting, and rough idle. Replacing it with a genuine OEM part restores reliable ignition performance and helps protect your coil and plug wire from premature wear.

Key Features

• OEM Yamaha replacement direct fit, no modification required
• Seals against moisture and salt spray
• Reduces electrical interference for consistent spark delivery
• Durable construction suited to marine operating conditions

Compatible Spark Plugs

Pair this cap with compatible NGK spark plugs for a complete ignition service:

• NGK Spark Plug – DR7EA
• NGK Spark Plug – DPR7EA-9

Related Ignition Components

• Yamaha F9.9F25 Outboard Ignition Coil Assembly – 6F5-85570-13-00

Parts Desk Insights

Best use case: Recommended when servicing spark plugs on Yamaha outboards especially during annual tune-ups or when diagnosing misfires and rough running. Inspect the cap for cracks, carbon tracking, or a loose fit whenever plugs are changed. Replacing the cap at the same time as the plugs is a low-cost step that prevents repeat service calls.

Part No.: 663-82370-01-00 | SKU: 663-82370-01-00