3LD-12118-00 Yamaha Cotter Valve | Genuine OEM Yamaha Outboard Part

🔧 Product Description

Genuine Yamaha Valve Cotter / Valve Keeper - Part Number: 3LD-12118-00-00

A genuine Yamaha valve cotter used in Yamaha four-stroke valve train assemblies. This small but critical keeper locks the valve spring retainer to the valve stem, helping secure the valve spring and maintain correct valve operation.

⚙️ Key Features

• Genuine Yamaha OEM valve cotter

• Correct Yamaha part number 3LD-12118-00-00

• Also known as a valve keeper or valve collet

• Used in intake and exhaust valve spring retainer assemblies

• Critical retaining component for four-stroke cylinder head service

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 3LD-12118-00-00 Yamaha valve cotter reference

• 3LD-12118-00 short Yamaha valve cotter format

OEM / Related Numbers:

• 3LD-12118-00-00

• 3LD-12118-00

• 3LD121180000

• 3LD1211800

Aftermarket / Verified Equivalents:

• WSM: 010-003-04

• Aftermarket reference: 3LD-12118-00

• Aftermarket reference: 3LD1211800

• Valve keeper / cotter replacement family for Yamaha intake and exhaust valve assemblies

• Yamaha four-stroke valve collet replacement family where 3LD-12118-00-00 is specified

🚤 Compatibility

Commonly used on:

• Yamaha four-stroke outboard valve assemblies

• Yamaha F70 valve train diagrams using 3LD-12118-00-00

• Yamaha intake and exhaust valve spring retainer systems

Typically suits:

• Engine models:

• Yamaha F70LA four-stroke outboard valve applications

• Yamaha F70 four-stroke outboard cylinder head assemblies where 3LD-12118-00-00 is specified

• Yamaha four-stroke marine engines using 3LD valve cotters in the intake valve assembly

• Yamaha four-stroke marine engines using 3LD valve cotters in the exhaust valve assembly

• Yamaha 1.8L and 1.9L marine engine valve train applications where 3LD-12118-00-00 is specified

• Yamaha engine valve spring retainer assemblies requiring OEM cotter 3LD-12118-00-00

• Engine Type: Yamaha four-stroke marine engine

• Component Type: Valve cotter / keeper

• Valve Location: Intake or exhaust, depending on engine diagram

• Year Range: model-specific Yamaha four-stroke applications

🔌 Function

The valve cotter locks the valve spring retainer to the valve stem. It keeps the valve spring correctly secured so the valve can open and close under camshaft control.

Common signs of failure:

• Valve spring retainer not seating correctly

• Valve dropping or losing retention

• Cylinder head ticking or abnormal valve train noise

• Valve clearance issues after service

• Engine misfire caused by valve train damage

• Damaged, worn or missing valve keeper during cylinder head overhaul

📦 Condition

• Genuine Yamaha part

• Brand new

• Supplied in original or equivalent packaging