Mercury Lower Unit | 2.33:1 Gear Ratio | Fits 2010 & Newer Mercury 1.7L EFI 75HP–115HP 4-Stroke Outboards | Resealed | 1-Year Warranty

Product Overview

Restore the performance and reliability of your Mercury outboard with this genuine Mercury Lower Unit, designed for select 2010 and newer Mercury 1.7L EFI 4-stroke outboards producing 75HP, 80HP, 90HP, 100HP, and 115HP. Featuring a 2.33:1 gear ratio, this professionally rebuilt lower unit is an excellent replacement for damaged or worn gearcases. Every lower unit is thoroughly inspected, resealed, pressure tested, and fitted with a new water pump impeller before shipment. Additional inspections ensure the driveshaft, prop shaft, shift mechanism, and internal gear surfaces meet OEM standards, delivering dependable performance and long service life. Professionally refinished and ready for installation, this lower unit is backed by a 1-Year Warranty for added confidence.

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Key Features

• Genuine Mercury Lower Unit
• Fits Mercury 1.7L EFI 4-Stroke Outboards
• 2.33:1 Gear Ratio
• Professionally Resealed
• Pressure Tested to 15 PSI
• New Water Pump Impeller Installed
• New Prop Shaft Installed
• Shift Operation Tested
• Driveshaft Checked for Straightness
• Professionally Primed and Painted
• Freshwater Unit
• Right-Hand Rotation
• Ready for Installation
• 1-Year Warranty Included

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Technical Specifications

Specification	Details
Brand	Mercury
Product Type	Lower Unit
Condition	Professionally Rebuilt
Engine Type	1.7L EFI 4-Stroke
Gear Ratio	2.33:1
Rotation	Right-Hand
Driveshaft Length	28-3/4 Inches
Driveshaft Splines	20
Prop Shaft Splines	15
Water History	Freshwater

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

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Compatible Applications

Designed for select Mercury outboard engines including: Model Years

• 2010 and Newer

Engine

• 1.7L EFI 4-Stroke

Horsepower

• 75 HP
• 80 HP
• 90 HP
• 100 HP
• 115 HP

Important: Always verify your engine's model number, serial number, 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 rebuilt and inspected to ensure dependable performance. Service and inspection include:

• Complete reseal
• Pressure tested to 15 PSI
• New water pump impeller installed
• New prop shaft installed
• Shift operation tested and verified
• Driveshaft checked for straightness
• Internal wear surfaces inspected under magnification
• OEM gears retained if they meet factory specifications
• Small imperfections in the anti-ventilation plate repaired before refinishing
• Professionally stripped, primed, and painted
• Ready for installation

Please Note: 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 Lower Unit Assembly
• New Water Pump Impeller
• New Prop Shaft
• Professionally Resealed and Pressure-Tested Gearcase

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 Lower Unit is backed by a 1-Year Warranty. Warranty coverage is activated by returning your old lower unit core. A prepaid return shipping label will be provided for qualifying core returns. A valid core must:

• Have an intact gearcase housing
• Have rotating driveshaft and prop shaft
• Be free from major structural damage such as holes through the housing

If you do not have a qualifying core, please contact EZ Boats Marine to discuss available warranty options.

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Why Buy from EZ Boats Marine?

• Genuine OEM Mercury Marine Parts
• Professionally Rebuilt Lower Units
• Freshwater Components When Available
• New Water Pump Impeller Installed
• Pressure Tested for Leak-Free Performance
• 1-Year Warranty Available
• Secure Packaging
• Fast Nationwide and International Shipping
• Experienced Marine Customer Support

EZ Boats Marine is dedicated to supplying premium OEM marine components that deliver dependable performance, exceptional value, and reliable customer support.

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Frequently Asked Questions

Which Mercury outboards does this lower unit fit?

This lower unit fits select 2010 and newer Mercury 1.7L EFI 4-stroke outboards rated at 75HP, 80HP, 90HP, 100HP, and 115HP. Always verify your engine's model number, serial number, and gear ratio before ordering.

Has this lower unit been rebuilt?

Yes. It has been professionally resealed, pressure tested, fitted with a new water pump impeller and prop shaft, and thoroughly inspected before sale.

What is the gear ratio?

This lower unit features a 2.33:1 gear ratio with right-hand rotation.

Is gear oil included?

No. Gear lubricant is not included and must be added before the lower unit is placed into service.

Does this lower unit include a warranty?

Yes. This lower unit includes a 1-Year Warranty, which is activated upon return of a qualifying lower unit core in accordance with EZ Boats Marine's warranty policy.