# 64E-4384J-00 Yamaha Trim Down Seal | Genuine OEM Yamaha Outboard Part

🔧 Product Description

  

Genuine Yamaha Trim Cylinder Down Seal - Part Number: 64E-4384J-00

  

A genuine Yamaha hydraulic trim-cylinder down seal for selected large-horsepower Yamaha outboards.

  

The seal is installed within the trim-cylinder end-cap assembly and maintains hydraulic pressure around the trim ram during downward movement. It works with the external dust seal and supporting O-rings to prevent hydraulic-fluid loss and water intrusion.

  

⚙️ Key Features

  

• Genuine Yamaha OEM trim-cylinder hydraulic seal

• Correct Yamaha part number 64E-4384J-00

• Used in the trim-down side of the cylinder end-cap assembly

• Supports hydraulic pressure retention and controlled ram movement

• Cross-references with Sierra, WSM and Pro Marine replacements

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 64E-4384J-00 current Yamaha OEM service reference

  

OEM / Related Numbers:

  

• 64E-4384J-00

• 64E-4384J-00-00

• 64E4384J0000

• 64E-43822-00 related trim dust seal

• 64E-43821-00 related trim-cylinder end screw

• 64E-43866-09 related outer O-ring

  

Aftermarket / Verified Equivalents:

  

• Sierra: 18-2082

• WSM: 335-310

• Pro Marine: 64E-4384JP

  

🚤 Compatibility

  

Commonly used on:

  

• Yamaha two-stroke and four-stroke power trim cylinder assemblies

• Yamaha VMAX, Saltwater Series, OX66, HPDI, four-stroke and SHO systems

  

Typically suits:

  

• Engine models:

• Yamaha 115HP, B115, C115, F115, LF115 and S115

• Yamaha 130HP, L130 and S130

• Yamaha 150HP, C150, F150, FL150, L150, LZ150, P150, S150, SX150, V150, VF150, VX150, VZ150 and Z150

• Yamaha 175HP, F175, P175, S175, V175, VZ175 and Z175

• Yamaha 200HP, F200, FL200, LF200, L200, LZ200, P200, S200, SX200, V200, VF200, VX200, VZ200 and Z200

• Yamaha 225HP, F225, LF225, V225, VF225, VX225, VZ225 and Z225

• Yamaha 250HP, F250, LF250, VF250, VX250, VZ250 and Z250

• Yamaha VZ300 and Z300 HPDI trim-cylinder assemblies

  

• HP Range: 115HP - 300HP

• Engine Type: Yamaha two-stroke, OX66, HPDI, four-stroke and VMAX SHO outboard

• Year Range: Approximately 1997 - 2018, dependent on trim cylinder

  

🔌 Function

  

The seal retains pressurised hydraulic fluid around the trim ram during trim-down operation. It also prevents water and contaminants from entering the hydraulic cylinder around the moving rod.

  

Common signs of failure:

  

• Hydraulic oil leaking around the trim-cylinder ram

• Engine slowly settles after being trimmed

• Trim movement becomes weak or uneven

• Air repeatedly enters the hydraulic system

• Seal lip is torn, flattened or hardened during overhaul

  

📦 Condition

  

• Genuine Yamaha part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 24.9 AUD
- **Vendor:** Yamaha
- **Tags:** Yamaha Marine Parts | Outboard Engine Parts & Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 24.90 AUD | In stock |

## Images

- 64E-4384J-00 Yamaha Trim Down Seal | Genuine OEM Yamaha Outboard Part
- 64E-4384J-00 Yamaha Trim Down Seal | Genuine OEM Yamaha Outboard Part
- 64E-4384J-00 Yamaha Trim Down Seal | Genuine OEM Yamaha Outboard Part
- 64E-4384J-00 Yamaha Trim Down Seal | Genuine OEM Yamaha Outboard Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/64e-4384j-00-seal-trim-down)
> Updated: 2026-07-11