437944 5000252 Johnson 20" Gearbox Complete | Genuine Used Part

🔧 Product Description

Genuine Johnson / Evinrude 55HP 20-Inch Complete Gearcase - Current Part Number: 5000252

A genuine OMC / BRP complete 20-inch standard-rotation lower unit for selected 55HP Johnson and Evinrude two-stroke outboards, including commercial model families. Current number 5000252 replaces earlier complete gearcase 0437944 / 437944.

⚙️ Key Features

• Genuine OMC / BRP complete gearcase
• Current part number 5000252
• Supersedes 0437944 / 437944
• 20-inch long-shaft configuration
• Standard propeller rotation

🚤 Compatibility

• Johnson 55HP model families using the 437944 / 5000252 gearcase
• Evinrude 55HP model families using the same lower unit
• Documented 1996 and 1997 55HP applications
• Includes selected commercial and standard-production 20-inch models
• Exact fitment is controlled by model code and shift-rod length

🔌 Function

The complete gearcase provides forward, neutral and reverse, reduces engine speed to propeller speed and pumps cooling water to the powerhead.

⚠️ Common Signs of Failure

• Gearcase jumps out of gear
• Gear oil is milky
• Clutch dog or gears are worn
• Driveshaft splines are damaged
• Propeller shaft is bent
• Housing is cracked or corroded

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 5000252 → Supersedes 0437944
• 437944 is the unprefixed OMC number
• Earlier housing, driveshaft and gear components remain separately serviceable

OEM / Related Numbers

• 5000252
• 0437944
• 437944
• Related 20-inch driveshaft
• Related propeller-shaft bearing housing, gear set, clutch dog and seal kit

Aftermarket / Verified Equivalents

• Specialist remanufactured OMC 55HP lower units
• Used complete Johnson / Evinrude 20-inch units with matching gear ratio and shift system
• Sierra, GLM and Mallory OMC gearcase seal, bearing and water-pump kits
• No verified universally interchangeable new aftermarket complete unit

📦 Condition

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