50020-99820-YAY Suzuki 20" Long Shaft Gearbox | Genuine Used Part

🔧 Product Description

Genuine Suzuki DF115BG / DF140BG Nebular Black 20-Inch Lower Unit - Part Number: 50020-99820-YAY

A genuine Suzuki complete lower-unit assembly for 20-inch standard-rotation DF115BG and DF140BG drive-by-wire four-stroke outboards. The YAY suffix identifies Nebular Black. The corresponding QTN number is the Super Cool White colour variant.

⚙️ Key Features

• Genuine Suzuki complete lower unit

• Correct part number 50020-99820-YAY

• Nebular Black finish

• 20-inch long-shaft configuration

• Standard propeller rotation

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 50020-99820-YAY is the documented Nebular Black L-shaft assembly

• 50020-99820-QTN is the equivalent Super Cool White colour version

• 50040-99820-YAY / QTN are 25-inch X-shaft versions

• Counter-rotation BG units use 99830-series part numbers

OEM / Related Numbers:

• 50020-99820-YAY

• 50020-99820-QTN white version

• 50040-99820-YAY 25-inch version

• 50040-99820-QTN 25-inch white version

• 50020-99830-YAY / QTN counter-rotation L-shaft versions

Aftermarket / Verified Equivalents:

• No verified direct aftermarket complete lower unit

• Genuine Suzuki colour variants are functional equivalents where shaft length and rotation are identical

• Specialist remanufactured DF115BG / DF140BG lower units

• Aftermarket seal, bearing, water-pump and propeller-shaft service parts are available separately

🚤 Compatibility

• Suzuki DF115BGL drive-by-wire four-stroke

• Suzuki DF140BGL drive-by-wire four-stroke

• Model years 2020 onward

• Serial range beginning approximately 020001 for the BG family, controlled by Suzuki assembly bulletin

• 20-inch long shaft and standard rotation only

🔌 Function

The lower unit converts vertical driveshaft rotation to propeller-shaft rotation, provides gear selection and houses the cooling-water pump.

Common signs of failure:

• Gear oil contamination

• Shift engagement fault

• Propeller-shaft runout

• Housing impact damage

• Incorrect standard or counter-rotation unit installed

• Water-pump pressure loss

📦 Condition

• Genuine used part

• Removed from running engine where applicable

• In good working condition unless otherwise stated