6H1-43872-10 Yamaha Ring Back-up (Scraper Nylon) | Genuine OEM Yamaha Outboard Part

🔧 Product Description

Genuine Yamaha Tilt Piston Nylon Backup Ring - Part Number: 6H1-43872-10

A genuine Yamaha nylon backup and scraper ring used on the central tilt-piston assembly of selected power trim and tilt units.

The ring supports the primary hydraulic seal under pressure and helps guide or scrape the tilt ram, reducing seal extrusion and premature wear.

⚙️ Key Features

• Genuine Yamaha OEM hydraulic backup ring

• Correct Yamaha part number 6H1-43872-10

• Durable nylon scraper and seal-support construction

• Used on the central tilt-piston assembly

• Important service item during tilt-cylinder rebuilding

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 6H1-43872-10 → Later service reference for 6H1-43872-00

• 6H1-43872-00 earlier Yamaha backup-ring reference

OEM / Related Numbers:

• 6H1-43872-10

• 6H1-43872-10-00

• 6H1438721000

• 6H1-43872-00

• 6H1-43810-11 related tilt-piston sub-assembly

• 6H1-43812-00 related tilt-ram seal

• 93210-18397 related piston O-ring

Aftermarket / Verified Equivalents:

• Included in aftermarket 6H1-43810-11 tilt-piston assemblies

• Direct replacement nylon ring: 6H1-43872-10

🚤 Compatibility

Commonly used on:

• Yamaha central power-tilt piston assemblies

Typically suits:

• Engine models:

• Yamaha C60

• Yamaha 60HP and 60F

• Yamaha 70HP and 70B

• Yamaha 75HP

• Yamaha 80HP

• Yamaha 85HP

• Yamaha 90HP and 90A

• Yamaha C60TLRY 2000 power trim assembly

• HP Range: Commonly 60HP - 90HP

• Engine Type: Yamaha two-stroke and selected four-stroke power trim

• Year Range: Approximately 1990s - 2010s, dependent on tilt-piston design

🔌 Function

The ring supports the primary hydraulic seal and prevents it from extruding into the clearance between the piston and cylinder under load.

Common signs of failure:

• Hydraulic seal repeatedly rolls or extrudes

• Tilt ram drifts downward

• Nylon ring is split, flattened or heavily worn

• Hydraulic oil leaks from the central tilt cylinder

• Excessive side movement is present at the piston

📦 Condition

• Genuine Yamaha part

• Brand new

• Supplied in original or equivalent packaging