# 55100-87J50-OEP Suzuki DF40 & DF50 Long Shaft Gearbox (Complete) | Genuine Used Part

🔧 Product Description

  

Genuine Suzuki DF40 / DF50 Shadow Black 20-Inch Gearcase Housing - Current Part Number: 55100-87J50-0EP

  

A genuine Suzuki Shadow Black gearcase housing for original-generation DF40 and DF50 four-stroke outboards. Despite the supplied title, 55100-87J50-0EP is a gearcase assembly or housing number and does not by itself confirm that gears, shafts, bearing carrier and water-pump components are included. It is the latest documented housing in a long 87J revision chain.

  

⚙️ Key Features

  

• Genuine Suzuki OEM gearcase housing

• Current number 55100-87J50-0EP

• 20-inch long-shaft configuration

• Standard rotation DF40 / DF50 family

• Shadow Black finish

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 55100-87J50-0EP supersedes or is equal to 55100-87J40-0EP

• Earlier related revisions: 55100-87J24, 87J23, 87J22, 87J21, 87J20, 87J10 and 87J01, all in 0EP finish

• The revision chain identifies the bare case assembly rather than a guaranteed complete lower unit

  

OEM / Related Numbers:

  

• 55100-87J50-0EP

• 55100-87J40-0EP

• 55100-87J24-0EP

• 55100-87J23-0EP

• 55100-87J22-0EP

• 55100-87J21-0EP

• 55100-87J20-0EP

• 55100-87J10-0EP

• 55100-87J01-0EP

  

Aftermarket / Verified Equivalents:

  

• No verified direct aftermarket bare housing

• Used genuine Suzuki 87J-series housings

• Specialist remanufactured complete DF40 / DF50 lower units

• Aftermarket gear set 57300-88810 and seal / water-pump service components where catalogued

  

🚤 Compatibility

  

• Suzuki DF40 original-generation four-stroke

• Suzuki DF50 original-generation four-stroke

• 20-inch standard-rotation applications

• Primary model-year range: approximately 1999-2010

• 55100-87J24 is specifically documented on DF40 / DF50 20-inch standard-rotation units

  

🔌 Function

  

The housing supports the gears, shafts, bearing carrier and water pump and forms the hydrodynamic lower body beneath the driveshaft housing.

  

Common signs of failure:

  

• Bearing bores are worn

• Carrier threads are corroded

• Housing is cracked

• Skeg or cavitation plate is damaged

• Oil passages or drain threads are damaged

• Internal parts are assumed included when only the housing is supplied

  

📦 Condition

  

• Genuine used part

• Internal gears, shafts and water-pump components are included only where shown

• In good working condition unless otherwise stated

## Details

- **Price:** 475.0 AUD
- **Vendor:** Sawley's Auto and Marine
- **Tags:** Sawley’s AAM Used Parts – Outboard Gearboxes (Complete Units) | Lower Units & Gearcases

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 475.00 AUD | In stock |

## Images

- 55100-87J50-OEP Suzuki DF40 & DF50 Long Shaft Gearbox (Complete) | Genuine Used Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/55100-87j50-oep-suzuki-df40-df50-long-shaft-gearbox-complete-genuine-used-part)
> Updated: 2026-07-20