67F-43861-00 Yamaha O-Ring | Genuine OEM Yamaha Outboard Part

🔧 Product Description

Genuine Yamaha Trim Cylinder End-Cap O-Ring - Part Number: 67F-43861-00

A genuine Yamaha hydraulic O-ring fitted to the trim-cylinder end-cap assembly on selected Yamaha four-stroke outboards.

The O-ring seals the trim-cylinder end screw or end cap against the hydraulic cylinder bore. It maintains trim-fluid pressure while preventing water and contaminants from entering the cylinder assembly.

⚙️ Key Features

• Genuine Yamaha OEM power trim O-ring
• Correct Yamaha part number 67F-43861-00
• Fits the hydraulic trim-cylinder end-cap location
• Supports pressure retention during trim and tilt operation
• Common service item during Yamaha trim-cylinder rebuilding

🚤 Compatibility

Commonly used on

• Yamaha four-stroke power trim and tilt assemblies
• Yamaha 67F-series trim-cylinder end-cap systems

Typically suits

• Engine models:
• Yamaha F75 four-stroke
• Yamaha F80 and F80A four-stroke
• Yamaha F90 four-stroke
• Yamaha F100 and F100A four-stroke
• Yamaha F100AET 2001 power trim and tilt assembly
• Yamaha F80BET 2005 power trim and tilt assembly
• Yamaha F90LA 2017 power trim and tilt assembly
• HP Range: 75HP - 100HP
• Engine Type: Yamaha four-stroke outboard with hydraulic power trim and tilt
• Year Range: Approximately 1999 - 2017, dependent on trim-unit design

🔌 Function

The O-ring seals the trim-cylinder end cap to the hydraulic cylinder body. This allows the trim system to retain fluid pressure and hold the engine at the selected angle.

⚠️ Common Signs of Failure

• Hydraulic fluid leaking around the trim-cylinder end cap
• Engine slowly drops after being trimmed
• Trim movement becomes weak or inconsistent
• O-ring becomes flattened, cut or swollen
• Water or corrosion is found inside the hydraulic cylinder

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 67F-43861-00 current Yamaha OEM service reference

OEM / Related Numbers

• 67F-43861-00
• 67F-43861-00-00
• 67F438610000
• 67F-43821-00 earlier related trim-cylinder end screw
• 67F-43821-09 later related trim-cylinder end screw
• 6H1-43812-00 related dust seal
• 6H1-43872-10 related backup ring
• 93210-18397 related hydraulic O-ring
• 62X-43862-00 related trim-cylinder O-ring

Aftermarket / Verified Equivalents

• No aftermarket equivalent

📦 Condition

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