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

🚤 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

🔄 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

📦 Condition

• Genuine Yamaha part
• Brand new
• Supplied in original or equivalent packaging