64E-43867-09 Yamaha Seal | Genuine OEM Yamaha Outboard Part

🔧 Product Description

Genuine Yamaha Inner Tilt Cylinder O-Ring Seal - Part Number: 64E-43867-09

A genuine Yamaha inner hydraulic O-ring, identified in Yamaha trim diagrams as O-Ring 7, for selected power trim and tilt cylinder assemblies.

The seal fits within the trim-cylinder end-cap arrangement and supports hydraulic pressure retention around the internal sealing components. It is commonly renewed together with the outer O-ring, dust seal and rod seal during trim-cylinder rebuilding.

⚙️ Key Features

• Genuine Yamaha OEM inner trim-cylinder O-ring
• Correct current Yamaha part number 64E-43867-09
• Supersedes the earlier 64E-43867-00 reference
• Used in the hydraulic cylinder end-cap assembly
• Cross-references with WSM replacement O-ring 526-58

🚤 Compatibility

Commonly used on

• Yamaha large-outboard hydraulic trim-cylinder end caps
• Yamaha two-stroke, OX66, HPDI and four-stroke power trim systems

Typically suits

• Engine models:
• Yamaha 115HP, C115, F115, LF115 and B115
• Yamaha 130HP and L130
• Yamaha 150HP, C150, F150, FL150, L150, LZ150, S150, SX150, V150, VX150, VZ150 and Z150
• Yamaha 175HP, F175, V175, VZ175 and Z175
• Yamaha 200HP, F200, FL200, LF200, L200, LZ200, SX200, V200, VX200, VZ200 and Z200
• Yamaha 225HP, F225, LF225, V225, VX225, VZ225 and Z225
• Yamaha 250HP, F250, LF250, VX250, VZ250 and Z250
• Yamaha VZ300 and Z300 HPDI trim assemblies
• HP Range: 115HP - 300HP
• Engine Type: Yamaha two-stroke, OX66, HPDI and four-stroke outboard
• Year Range: Approximately 1997 - 2018, dependent on trim-cylinder design

🔌 Function

The O-ring provides an internal hydraulic seal within the trim-cylinder end-cap assembly. It supports consistent trim pressure and prevents fluid from bypassing the sealing surfaces.

⚠️ Common Signs of Failure

• Hydraulic oil leakage from the cylinder end cap
• Trim ram drifts downward after the switch is released
• Weak or inconsistent trim response
• O-ring appears cut, compressed or chemically swollen
• Internal leakage remains after replacing the external dust seal

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 64E-43867-09 → Supersedes 64E-43867-00
• 64E-43867-00 earlier Yamaha inner O-ring reference

OEM / Related Numbers

• 64E-43867-09
• 64E-43867-09-00
• 64E438670900
• 64E-43867-00
• 64E-43867-00-00
• 64E-43866-09 related outer O-ring
• 64E-4384J-00 related trim-down seal

Aftermarket / Verified Equivalents

• WSM: 526-58

📦 Condition

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