888845T02 Mercury Extra Long Gearbox | Genuine Used Part

🔧 Product Description

Genuine Mercury 115HP Four-Stroke 25-Inch Lower Unit - Part Number: 888845T02

A genuine used Mercury complete extra-long gearcase for the earlier Yamaha-manufactured Mercury and Mariner 115HP EFI four-stroke outboard. The 25-inch assembly uses a 2.07:1 reduction ratio, a 14-tooth pinion and the 4.25-inch gearcase housing.

⚙️ Key Features

• Genuine Mercury Marine complete gearcase
• Correct part number 1600-888845T02
• 25-inch extra-long shaft configuration
• 2.07:1 ratio with 14-tooth pinion
• Used on earlier 115HP four-cylinder four-stroke engines

🚤 Compatibility

Commonly used on

• Mercury 115 EFI FourStroke outboards
• Mariner 115 EFI FourStroke outboards
• Yamaha-manufactured Mercury four-cylinder powerhead platform

Typically suits

• Mercury 115 EFI FourStroke serial 0T801000 through 1B226999
• Mercury 115 EFI FourStroke serial 1B227000 through 1B366822
• Approximately 2001-2006 model production
• 25-inch transom-height installations
• HP Range: 115HP
• Shaft Length: 25 inches / XL
• Gear Ratio: 2.07:1
• Pinion Teeth: 14
• Fitment Requirement: Confirm serial range and do not confuse with later 888845T09 2.33:1 unit

🔌 Function

The assembly provides gear reduction and directional control, drives the propeller and houses the water pump for engine cooling.

⚠️ Common Signs of Failure

• Incorrect 2.33:1 replacement fitted to a 2.07:1 application
• Water-contaminated oil
• Gear or bearing noise
• Propeller-shaft play
• Corroded or cracked housing

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 888845T02 established early 115 FourStroke XL service assembly
• 888845T01 is the related 20-inch long-shaft version
• 888845T09 is a later 2.33:1 unit and is not a direct ratio-equivalent replacement

OEM / Related Numbers

• 1600-888845T02
• 888845T02
• 888845T01 related 20-inch assembly
• 9011J2 related early 20-inch 2.07:1 four-stroke gearcase
• 4.25-inch / approximately 108mm torpedo housing
• 14-tooth pinion / 2.07:1 gear set

Aftermarket / Verified Equivalents

• Professionally remanufactured Mercury 115HP four-stroke 2.07:1 XL lower units
• Used genuine Mercury 888845T02 assemblies
• Aftermarket seal, bearing and water-pump service kits
• No verified direct Yamaha-number complete gearbox interchange without matching the Mercury driveshaft and shift system
• Later 2.33:1 units must not be substituted without evaluating propeller loading and engine calibration

📦 Condition

• Genuine used part
• Removed from running engine or vessel where applicable
• In good working condition unless otherwise stated