Yamaha 20" Lower Unit | Fits 2001–2003 & Up Yamaha 8 & 9.9 HP 4-Stroke Outboards | 1-Year Warranty

Product Overview

Restore dependable performance to your Yamaha outboard with this genuine OEM Yamaha 20" Lower Unit, designed for 2001–2003 & newer Yamaha 8 HP and 9.9 HP 4-Stroke outboards. Professionally inspected, serviced, and tested, this lower unit is ready for installation and backed by a 1-Year Working Warranty. Each lower unit is opened and inspected under magnification to ensure internal components meet OEM standards. It has been fully resealed, pressure tested to 12 PSI, and fitted with a new water pump impeller. Original OEM gears are retained whenever they meet inspection standards, ensuring reliable operation and long service life. Please note: Gear oil is not included and must be added prior to operation. Always verify compatibility using your engine's model, serial number, shaft length, and OEM specifications before purchasing.

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Key Features

• Genuine OEM Yamaha 20" Lower Unit
• Fits 2001–2003 & newer Yamaha 8 HP & 9.9 HP 4-Stroke outboards
• Professionally opened and inspected
• Fully resealed
• Pressure tested to 12 PSI
• New water pump impeller installed
• OEM gears inspected and replaced only when necessary
• Ready to install
• Backed by a 1-Year Working Warranty

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Technical Specifications

Specification	Details
Brand	Yamaha
Product Type	Complete Lower Unit
Condition	Used – Professionally Inspected
Shaft Length	20"
Driveshaft Length	17-15/16"
Driveshaft Splines	10
Prop Shaft Splines	8
Engine Type	4-Stroke
Horsepower	8 HP, 9.9 HP

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Compatible Applications

Designed for select Yamaha outboards including: Model Years

• 2001
• 2002
• 2003
• & Newer Compatible Models

Shaft Length

• 20"

Horsepower

• 8 HP
• 9.9 HP

Engine Type

• Yamaha 4-Stroke

Important: Always verify compatibility using your engine's model, serial number, shaft length, and OEM specifications before purchasing. If you need assistance confirming fitment, contact EZ Boats Marine and we'll be happy to help.

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Condition

This Yamaha lower unit has been professionally inspected and serviced and is in excellent working condition. Inspection highlights include:

• Opened and inspected under magnification
• Fully resealed
• Pressure tested to 12 PSI
• New water pump impeller installed
• OEM gears inspected and replaced only when necessary
• Ready for installation

Important: Gear oil is not included and must be added before use. Please review all product photos carefully before purchasing.

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What's Included

Your purchase includes:

• OEM Yamaha 20" Complete Lower Unit

Only the components shown in the product photos are included.

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Shipping Information

Your lower unit will be professionally packaged to help prevent shipping damage during transit. 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 Inspected & Serviced Components
• Fully Resealed & Pressure Tested
• New Water Pump Impeller Installed
• 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 support.

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Frequently Asked Questions

Is this a genuine Yamaha lower unit?

Yes. This is an original OEM Yamaha lower unit that has been professionally inspected, serviced, and tested for reliable performance.

What service has been performed?

The lower unit has been opened and inspected under magnification, fully resealed, pressure tested to 12 PSI, and fitted with a new water pump impeller. OEM gears are retained unless replacement is required.

Which engines does it fit?

This lower unit fits select 2001–2003 & newer Yamaha 8 HP and 9.9 HP 4-Stroke outboards with a 20-inch shaft. Always verify compatibility using your engine's model and serial number before ordering.

Is gear oil included?

No. Gear oil is not included and must be added prior to installation and operation.

Is it covered by a warranty?

Yes. This lower unit is backed by a 1-Year Working Warranty covering failures during normal use.

Can EZ Boats Marine verify fitment?

Absolutely. Simply send us your Yamaha engine's model and serial number, and we'll confirm whether this OEM 20-inch Lower Unit is the correct fit before you purchase.