Yamaha T9.9 Dressed Powerhead | OEM 66M-W009B-13-1S | Fits 1998–2008 Yamaha T9.9 & FT9.9 High-Thrust 9.9 HP 4-Stroke | Freshwater | Ready to Install

Product Overview

Restore the performance of your Yamaha kicker motor with this genuine OEM Yamaha Dressed Powerhead, designed for 1998–2008 Yamaha T9.9 and FT9.9 High-Thrust 9.9 HP 4-stroke outboards. This complete powerhead was removed from a freshwater Yamaha T9.9ELR2 donor engine and has been thoroughly inspected prior to removal. It features 120 PSI and 125 PSI compression, good spark, and no visible cylinder scoring when inspected with a bore scope. Aside from a small chip on one carburetor bolt mounting area that does not affect performance or installation, the assembly is in excellent working condition and is ready to install. Whether you're replacing a damaged engine or rebuilding your Yamaha T9.9, this OEM powerhead offers dependable factory performance.

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Key Features

• Genuine OEM Yamaha dressed powerhead
• OEM Cylinder Block Assembly 66M-W009B-13-1S
• Fits Yamaha T9.9 & FT9.9 High-Thrust models
• Freshwater engine removal
• Compression tested at 120 PSI and 125 PSI
• Good spark verified
• No cylinder scoring visible under bore scope inspection
• Small cosmetic chip on one carburetor bolt boss (does not affect operation)
• Ready for installation
• Complete dressed assembly
• OEM Yamaha quality

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Technical Specifications

Specification	Details
Brand	Yamaha
Product Type	Dressed Powerhead
Condition	Used – Professionally Inspected
OEM Part Number	66M-W009B-13-1S
Engine Type	4-Stroke
Engine Configuration	2-Cylinder
Horsepower	9.9 HP
Model	T9.9 / FT9.9 High-Thrust
Compression	120 PSI / 125 PSI
Warranty	Sold As-Is

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OEM Part Numbers

Primary Part Number

• 66M-W009B-13-1S

Also Replaces

• 66M-W009B-12-1S
• 66M-W009B-11-1S
• 66M-W009B-10-1S

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Compatible Applications

Designed for select Yamaha outboards including:

Model Years

• 1998
• 1999
• 2000
• 2001
• 2002
• 2003
• 2004
• 2005
• 2006
• 2007
• 2008

Models

• Yamaha T9.9
• Yamaha FT9.9 High-Thrust

Engine Specifications

• 9.9 HP
• 4-Stroke
• 2-Cylinder
• High-Thrust

Donor Engine

• Model: Yamaha T9.9ELR2
• Serial Number: 66RKL1001393

Important: Always verify compatibility using your engine's model, serial number, and OEM part number (66M-W009B-13-1S) before ordering. Contact EZ Boats Marine if you need assistance confirming fitment.

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Condition

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

• Removed from a freshwater engine
• Compression tested at 120 PSI and 125 PSI
• Good spark verified
• No visible cylinder scoring under bore scope inspection
• Small chip on one carburetor bolt mounting area (does not affect performance)
• Ready for installation
• Sold exactly as pictured

Please review all product photos carefully before purchasing.

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What's Included

Your purchase includes:

• Complete OEM Yamaha Dressed Powerhead

Only the components shown in the listing photos are included.

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Shipping Information

Your powerhead will be professionally packaged to ensure safe transportation. Fast shipping is available 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 Engine Components
• Professionally Inspected
• Compression Tested
• Bore Scope Cylinder Inspection
• Honest Condition Descriptions
• Secure Packaging
• Fast Nationwide & International Shipping
• Experienced Marine Parts Specialists
• Dedicated Customer Support

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

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Frequently Asked Questions

Is this a genuine Yamaha powerhead?

Yes. This is an original OEM Yamaha dressed powerhead removed from a Yamaha T9.9 High-Thrust outboard.

Has this powerhead been tested?

Yes. The engine was inspected before removal and features 120 PSI and 125 PSI compression, good spark, and no visible cylinder scoring during bore scope inspection.

Which engines does it fit?

This powerhead fits select 1998–2008 Yamaha T9.9 and FT9.9 High-Thrust 9.9 HP 4-stroke outboards. Always verify compatibility using your engine's model, serial number, and OEM part number.

Is there any damage?

The powerhead has a small chip on one carburetor bolt mounting area. This is cosmetic and does not affect installation or engine performance.

Does it include external components?

Yes. This is a dressed powerhead and is sold complete as shown in the product photos.

Can EZ Boats Marine verify compatibility?

Absolutely. Send us your Yamaha engine's model and serial number, and we'll confirm whether this OEM 66M-W009B-13-1S Dressed Powerhead is the correct replacement for your outboard before you purchase.