9011J15 Mercury Gearbox | Genuine Used Part

🔧 Product Description

Genuine Mercury 75HP-125HP 20-Inch 2.33:1 Gearcase - Part Number: 9011J15

A genuine used Mercury / Mariner complete 20-inch lower unit from the 2.33:1, 12-tooth-pinion, six-jaw reverse-clutch family. Mercury catalogues describe 9011J15 as fitting selected 75HP to 125HP two-stroke engines, but it must be matched by cylinder family, clutch design and original gear-housing chart rather than horsepower alone.

⚙️ Key Features

• Genuine Mercury Marine complete gearcase
• Correct part number 1667-9011J15
• 20-inch long shaft
• 2.33:1 ratio with 12-tooth pinion
• Six-jaw reverse-clutch configuration

🚤 Compatibility

Commonly used on

• Selected Mercury / Mariner 75HP, 80HP and 90HP two-strokes
• Selected 100HP, 115HP and 125HP applications listed under six-jaw charts
• 20-inch standard-rotation installations

Typically suits

• Common on 75HP-90HP three-cylinder two-stroke families
• Some Mercury catalogues extend 9011J15 coverage through 125HP
• Fitment depends on the six-jaw reverse clutch and 2.33:1 gear set
• The original complete assembly or serial-specific gear-housing chart must be checked
• HP Range: Selected 75HP - 125HP
• Shaft Length: 20 inches / L
• Gear Ratio: 2.33:1
• Pinion Teeth: 12
• Reverse Clutch: Six-jaw

🔌 Function

The gearcase provides a lower 2.33:1 reduction for suitable engine and hull combinations while transmitting power and providing forward-neutral-reverse operation.

⚠️ Common Signs of Failure

• Wrong clutch-jaw count
• Wrong 2.07:1 or 2.33:1 ratio
• Gear or bearing noise
• Water in the lubricant
• Shaft, skeg or housing damage

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 9011J15 supersedes selected 9011G57 and 9011G58 applications
• Other J-series housings may have 2.07:1 ratios or three-jaw clutches
• 9011J24 / J27 are related 25-inch 2.33:1 units on some 75HP-90HP applications

OEM / Related Numbers

• 1667-9011J15
• 9011J15
• 9011G57
• 9011G58
• 12-tooth pinion
• 2.33:1 gear ratio
• Six-jaw reverse clutch

Aftermarket / Verified Equivalents

• BoatEngine professionally remanufactured 9011J15 lower unit
• Remanufactured Mercury 75HP-125HP six-jaw gearcases
• Aftermarket seal, bearing and water-pump kits
• Used genuine 9011J15 / G57 / G58 assemblies
• No three-jaw gearcase should be substituted without changing the compatible shift components

📦 Condition

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