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

🔄 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

🚤 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

📦 Condition

• Genuine Yamaha part

• Brand new

• Supplied in original or equivalent packaging