Charge Coil for Yamaha 40HP 2-Stroke Outboard (40X E40X) | 66T-85520-00

This high-output charging coil is a direct replacement for Yamaha 40HP 2-stroke outboard engines, designed to replace OEM part number 66T-85520-00. Specifically engineered for Yamaha 40X and E40X models, it delivers stable electrical output for reliable ignition performance and consistent battery charging under all operating conditions.

Manufactured with heavy-duty copper windings and a marine-grade aluminum base plate, this magneto charging coil is built to withstand high engine temperatures, vibration, and harsh saltwater environments. It helps restore proper electrical performance, eliminating common issues such as weak spark, misfires at high RPM, and charging system failures.

OEM Replacement for Yamaha 40X / E40X Outboards

This charging coil is engineered to OEM specifications to ensure proper fitment and electrical output. It is a direct bolt-on replacement, requiring no wiring modifications or custom adjustments.

• Replaces OEM part number 66T-85520-00
• Designed for Yamaha 40HP 2-stroke ignition and charging systems
• Restores stable spark and charging performance
• Plug-and-play installation using factory mounting points

Ideal for routine maintenance, repairs, or full ignition system restoration.

Compatible Models & OEM Part Numbers

Always verify your original part number and mounting dimensions before ordering.

Technical Specifications

• Coil Type: Magneto Charging Coil / Ignition Charging Coil
• Mounting Hole Distance: 54mm (2.1")
• Material: 200°C heat-resistant copper windings
• Base Plate: Marine-grade aluminum
• Application: Ignition system & battery charging
• Condition: Brand new, aftermarket OEM replacement

Designed for stable electrical output across the full RPM range.

Signs Your Yamaha 40HP Charging Coil Is Failing

A worn or damaged charging coil can cause a variety of performance and electrical issues. Common symptoms include:

• Weak or inconsistent spark
• Battery not charging properly
• Engine misfires at high RPM
• Hard starting or intermittent stalling
• Unstable idle or loss of power

Replacing a faulty charging coil can quickly restore proper ignition timing and electrical performance.

Installation & Fitment Notes

• Direct bolt-on installation using factory mounting points
• No wiring modifications required
• Professional installation is recommended for best results
• Inspect flywheel magnets and wiring condition during installation

Proper installation ensures optimal ignition performance and long service life.

Frequently Asked Questions

Does this replace OEM part number 66T-85520-00?
Yes. This charging coil is a direct replacement for Yamaha OEM part number 66T-85520-00 and 66T-85520-00-00.

Is this compatible with Yamaha 40X and E40X models?
Yes. It is specifically designed for Yamaha 40HP 2-stroke engines including the 40X and E40X series.

Is this a charging coil or an ignition coil?
This is a magneto charging coil used in the ignition and charging system to generate electrical power for spark and battery charging.

Will this coil charge the battery?
Yes. When properly installed, it provides the electrical output required for both ignition performance and battery charging.

Does it fit Parsun or Hidea 40HP outboards?
Yes. This coil is compatible with Parsun and Hidea 40HP 2-stroke engines that use OEM part number 66T-85520-00.

✔ Why Choose This Charging Coil?

• OEM-spec electrical output
• Direct-fit design for Yamaha 40HP platforms
• Marine-grade materials for long-term durability
• Proven performance in saltwater and freshwater use

Restore reliable ignition and charging performance to your Yamaha 40HP 2-stroke outboard with this high-quality replacement charging coil.