Yamaha OEM Wire Harness | OEM 6D0-82590-21-00 / 6D0-82590-20-00 | Fits 2005–2006 Yamaha 300 HP Outboards | Freshwater OEM Harness | 45-Day Returns

Product Overview

Replace your damaged or worn engine wiring with this genuine OEM Yamaha Wire Harness, designed for 2005–2006 Yamaha 300 HP outboards. This factory wiring harness was removed from a freshwater engine and has been professionally inspected to ensure all wiring and connectors remain in excellent working condition. Featuring OEM part number 6D0-82590-21-00, which supersedes 6D0-82590-20-00, this harness has no cut, burnt, or broken wires and is ready for installation. It includes everything shown in the product photos and is an ideal replacement for restoring your engine's electrical system. Please verify compatibility using your engine model, serial number, and OEM part number before purchasing.

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Key Features

• Genuine OEM Yamaha wire harness
• Fits 2005–2006 Yamaha 300 HP outboards
• Freshwater donor component
• No cut, burnt, or broken wires
• Professionally inspected
• OEM connectors intact
• Includes all components shown in photos
• Ready for installation
• 45-day return policy

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Technical Specifications

Specification	Details
Brand	Yamaha
Product Type	Engine Wire Harness
Condition	Used – Professionally Inspected
OEM Part Number	6D0-82590-21-00
Superseded Part Number	6D0-82590-20-00
Horsepower	300 HP
Model Years	2005–2006

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OEM Part Numbers

Primary Part Number

• 6D0-82590-21-00

Superseded Part Number

• 6D0-82590-20-00

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Compatible Applications

Designed for select Yamaha outboards including:

Model Years

• 2005
• 2006

Horsepower

• 300 HP

Important: Always verify compatibility using your engine model, serial number, and OEM part number (6D0-82590-21-00) before purchasing. If you need assistance confirming fitment, EZ Boats Marine will be happy to help.

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Condition

This Yamaha OEM wire harness has been professionally inspected and is in excellent used condition. Inspection highlights include:

• Removed from a freshwater engine
• OEM Yamaha component
• No cut, burnt, or broken wires
• Connectors in good condition
• Normal cosmetic scuffs from previous use
• Includes all components shown in the product photos
• Ready for installation

Please review all product photos carefully before purchasing.

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What's Included

Your purchase includes:

• OEM Yamaha Engine Wire Harness

Only the components shown in the product photos are included.

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Shipping Information

Your wiring harness will be carefully packaged to protect all electrical connectors during shipping. We offer fast shipping throughout the United States, with international shipping available upon request. For an accurate shipping quote, please provide:

• Country
• ZIP or Postal Code
• Residential or Commercial Address
• Whether liftgate service is required

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Why Buy from EZ Boats Marine?

• Genuine OEM Yamaha Marine Parts
• Freshwater OEM Components
• Professionally Inspected
• OEM Connectors in Excellent Condition
• Ready for Installation
• Honest Condition Descriptions
• 45-Day Return Policy
• Fast Nationwide & International Shipping
• Secure Packaging
• Experienced Marine Parts Specialists
• Dedicated Customer Support

EZ Boats Marine is committed to supplying quality OEM marine parts backed by expert service and dependable customer support.

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Frequently Asked Questions

Is this a genuine Yamaha wire harness?

Yes. This is an original OEM Yamaha engine wire harness removed from a freshwater Yamaha outboard.

Has the harness been inspected?

Yes. The harness has been professionally inspected and all wires and connectors were checked. There are no cut, burnt, or broken wires.

Which engines does it fit?

This harness fits select 2005–2006 Yamaha 300 HP outboards. Always verify compatibility using your engine's model, serial number, and OEM part number (6D0-82590-21-00) before ordering.

What is included?

The purchase includes the OEM Yamaha wire harness exactly as shown in the listing photos.

Is this covered by a warranty?

This listing includes a 45-day return policy. If the item arrives with an issue or is not as described, EZ Boats Marine will work with you to resolve it. Returns due to incorrect ordering or change of mind are accepted within 45 days and may be subject to return shipping costs and a 20% restocking fee.

Can EZ Boats Marine verify fitment?

Absolutely. Simply send us your Yamaha engine's model and serial number, and we'll confirm whether this genuine OEM 6D0-82590-21-00 / 6D0-82590-20-00 Wire Harness is the correct replacement before you purchase.