Mercury XL Lower Unit | 25" Shaft | 1.87:1 Gear Ratio | Fits 1976–2015 Mercury 135HP, 150HP, 175HP & 200HP Outboards | 6-Month Warranty

Product Overview

Restore reliable performance to your Mercury outboard with this genuine Mercury XL Lower Unit, designed for select 1976–2015 Mercury 135HP, 150HP, 175HP, and 200HP outboard engines. Featuring a 25-inch extra-long (XL) shaft and 1.87:1 gear ratio, this professionally serviced OEM lower unit delivers dependable shifting, smooth power transfer, and long-lasting durability. Each lower unit is carefully disassembled, pressure tested, and inspected under magnification to ensure all critical components meet performance standards. Worn internal parts are replaced as needed, and a new water pump impeller is installed before shipment. The driveshaft has only light spline wear and remains fully serviceable for continued use. Ready for installation, this lower unit is backed by a 6-Month Working Warranty covering the gears, bearings, and shafts.

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Key Features

• Genuine OEM Mercury XL Lower Unit
• Fits Mercury 135HP, 150HP, 175HP & 200HP Outboards
• 25-Inch Extra-Long (XL) Shaft
• 1.87:1 Gear Ratio
• Professionally Inspected
• Pressure Tested
• New Water Pump Impeller Installed
• Internal Components Inspected Under Magnification
• Worn Components Replaced as Required
• Light Driveshaft Spline Wear
• Ready for Installation
• 6-Month Working Warranty

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Technical Specifications

Specification	Details
Brand	Mercury
Product Type	Lower Unit
Condition	Professionally Serviced
Gear Ratio	1.87:1
Shaft Length	25 Inches (XL)
Horsepower	135 HP / 150 HP / 175 HP / 200 HP
Model Years	1976–2015
Driveshaft Length	26-1/4 Inches
Driveshaft Splines	8
Prop Shaft Splines	15

Driveshaft length is measured from the top of the water pump to the top of the driveshaft.

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OEM Part Numbers

Primary Part Number

• 9148T85

Also Replaces

• 9148A85
• 9148A72
• 9148A9
• 8688A2
• 7350A27
• 7350A6

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Compatible Applications

Designed for select Mercury outboard engines including: Model Years

• 1976–2015

Horsepower

• 135 HP
• 150 HP
• 175 HP
• 200 HP

Engine Family

• Mercury 2.0L

Shaft Length

• 25-Inch Extra-Long (XL)

Gear Ratio

• 1.87:1

Important: Always verify your engine's model number, serial number, shaft length, gear ratio, and OEM part number before purchasing. If you need assistance confirming compatibility, our team is happy to help.

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Condition

This lower unit has been professionally serviced and thoroughly inspected before being offered for sale. Service and inspection include:

• Pressure tested for leak-free performance
• New water pump impeller installed
• Complete internal inspection under magnification
• Worn internal components replaced where necessary
• Driveshaft splines show only light normal wear
• Ready for installation

Please Note:

• Mounting studs are not included.
• Gear oil is not included and must be added before operating the lower unit.

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What's Included

Your purchase includes:

• Mercury XL 25-Inch Lower Unit Assembly
• New Water Pump Impeller

Not Included:

• Mounting Studs
• Gear Oil

Only the components shown in the product photos are included.

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Shipping Information

Every lower unit is securely packaged to protect it 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
• Commercial or Residential Address
• Whether liftgate service is required

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Warranty

This Mercury XL Lower Unit includes a 6-Month Working Warranty. The warranty covers the following internal components under normal recreational use:

• Gears
• Bearings
• Driveshaft
• Propeller Shaft

Please note that seals are not covered under this warranty. If a covered component fails during the warranty period, EZ Boats Marine will repair, replace, or refund the unit if a replacement is unavailable, in accordance with our warranty policy.

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Why Buy from EZ Boats Marine?

• Genuine OEM Mercury Marine Parts
• Professionally Serviced Lower Units
• Pressure Tested Before Shipment
• New Water Pump Impeller Installed
• Internal Components Professionally Inspected
• OEM Replacement Parts Used Where Required
• 6-Month Working Warranty
• Secure Packaging
• Fast Nationwide and International Shipping
• Experienced Marine Customer Support

EZ Boats Marine is committed to supplying premium OEM marine components backed by dependable service, expert support, and reliable performance.

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Frequently Asked Questions

Which Mercury outboards does this lower unit fit?

This lower unit fits select 1976–2015 Mercury 135HP, 150HP, 175HP, and 200HP outboards equipped with a 25-inch XL shaft and 1.87:1 gear ratio. Always verify your engine's model number, serial number, and OEM part number before ordering.

Has this lower unit been professionally serviced?

Yes. It has been pressure tested, internally inspected under magnification, fitted with a new water pump impeller, and any worn internal components have been replaced as needed.

Are the mounting studs included?

No. This lower unit does not include mounting studs. Please reuse your existing hardware or source replacements before installation.

Is gear oil included?

No. The lower unit is shipped without gear oil, and lubricant must be added before operation.

What does the warranty cover?

The included 6-Month Working Warranty covers the gears, bearings, driveshaft, and propeller shaft under normal operation. Seals are excluded from warranty coverage.