Yamaha Injector Driver & ECU Assembly | OEM 6C9-8591A-21-00 / 60V-8591B-00-00 | Fits 2005–2009 Yamaha 300 HP 2-Stroke Outboards | Engine Tested | CDI Report Included | 1-Year Warranty

Product Overview

Restore factory engine management performance with this genuine OEM Yamaha Injector Driver & ECU Assembly, designed for 2005–2009 Yamaha 300 HP 2-stroke outboards. This complete OEM assembly includes both the Engine Control Unit (ECU) and Injector Driver Module, professionally tested on the donor engine and verified with a CDI diagnostic tester before removal. Removed from a Yamaha VZ300TLR 300 HP freshwater donor engine, the assembly recorded 709 verified engine hours with no active fault codes. A CDI diagnostic report is included with your purchase, and the complete assembly is backed by a 1-Year Working Warranty for added confidence. Always verify compatibility using your engine's model, serial number, and OEM part numbers before ordering.

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Key Features

• Genuine OEM Yamaha Injector Driver & ECU Assembly
• Fits 2005–2009 Yamaha 300 HP 2-stroke outboards
• Engine tested before removal
• Professionally CDI tested
• CDI diagnostic report included
• 709 verified engine hours
• No active fault codes
• OEM ECU and Injector Driver sold together
• Ready for installation
• Backed by a 1-Year Working Warranty

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Technical Specifications

Specification	Details
Brand	Yamaha
Product Type	Injector Driver & ECU Assembly
Condition	Used – Professionally Tested
Engine Type	2-Stroke
Horsepower	300 HP
Model Years	2005–2009
Engine Hours	709 Hours
Warranty	1-Year Working Warranty

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OEM Part Numbers

Primary Part Numbers

• 6C9-8591A-21-00 – ECU
• 60V-8591B-00-00 – Injector Driver

Also Replaces

• 6C9-8591A-20-00
• 60V-85542-01-94

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Compatible Applications

Designed for select Yamaha outboards including:

Model Years

• 2005
• 2006
• 2007
• 2008
• 2009

Horsepower

• 300 HP

Engine Type

• Yamaha 2-Stroke

Donor Engine

• Yamaha VZ300TLR

Important: Always verify compatibility using your engine model, serial number, and OEM part numbers before purchasing. If you need assistance confirming fitment, EZ Boats Marine will be happy to help.

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Condition

This Yamaha Injector Driver & ECU Assembly has been professionally inspected and tested. Inspection highlights include:

• Tested on the donor engine before removal
• Professionally CDI tested
• CDI diagnostic report included
• 709 verified engine hours
• No active fault codes
• OEM ECU and Injector Driver assembly
• Ready for installation

Please review all product photos carefully before purchasing.

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What's Included

Your purchase includes:

• OEM Yamaha ECU
• OEM Yamaha Injector Driver Module
• CDI Diagnostic Test Report

Only the components shown in the product photos are included.

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Shipping Information

Your ECU and Injector Driver assembly will be carefully packaged to protect sensitive electronic components 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
• Professionally Engine Tested
• CDI Diagnostic Report Included
• OEM ECU & Injector Driver Assembly
• 709 Verified Engine Hours
• 1-Year Working Warranty
• Honest Condition Descriptions
• 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 ECU and Injector Driver assembly?

Yes. This is an original OEM Yamaha Injector Driver & ECU Assembly removed from a Yamaha VZ300TLR 300 HP 2-stroke outboard.

Has this assembly been tested?

Yes. The assembly was tested on the donor engine and professionally verified using a CDI diagnostic tester. A CDI report showing 709 verified engine hours and no active fault codes is included with the purchase.

Which engines does it fit?

This assembly fits select 2005–2009 Yamaha 300 HP 2-stroke outboards. Always verify compatibility using your engine's model, serial number, and OEM part numbers before ordering.

What is included?

Your purchase includes the OEM ECU, OEM Injector Driver Module, and the CDI Diagnostic Test Report. Only the components shown in the product photos are included.

Is this covered by a warranty?

Yes. This OEM Yamaha electrical assembly is backed by a 1-Year Working Warranty. If it fails during normal use within the warranty period, EZ Boats Marine will replace it or provide a refund if a replacement is unavailable.

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 6C9-8591A-21-00 / 60V-8591B-00-00 Injector Driver & ECU Assembly is the correct replacement before you purchase.