682-12414-A1 Yamaha Gasket | Genuine OEM Yamaha Outboard Part

🔧 Product Description

Genuine Yamaha Thermostat Cover Gasket - Part Number: 682-12414-A1

A genuine Yamaha thermostat cover gasket for selected 9.9HP and 15HP two-stroke outboards.

The gasket seals the thermostat cover to the cylinder or crankcase cooling passage, preventing cooling-water leakage and maintaining the correct flow through the thermostat housing.

⚙️ Key Features

• Genuine Yamaha OEM thermostat gasket
• Correct Yamaha part number 682-12414-A1
• Used on Yamaha 9.9HP and 15HP two-stroke cooling systems
• Suitable for thermostat inspection and replacement service
• Cross-references with Sierra and aftermarket gasket numbers

🚤 Compatibility

Commonly used on

• Yamaha 9.9HP and 15HP two-stroke thermostat covers

Typically suits

• Engine models:
• Yamaha 9.9A
• Yamaha 9.9B
• Yamaha 9.9C
• Yamaha 9.9D
• Yamaha 15A
• Yamaha 15C
• Yamaha 15D
• Yamaha 15LH 1987
• Yamaha 9.9LD 1990
• HP Range: 9.9HP - 15HP
• Engine Type: Yamaha carburetted two-stroke outboard
• Year Range: Approximately 1987 - 2000s, dependent on cylinder design

🔌 Function

The gasket seals the thermostat cover so cooling water remains contained within the cylinder cooling passages.

⚠️ Common Signs of Failure

• Water leaking around the thermostat cover
• Salt deposits or staining around the gasket joint
• Engine overheats because the cover will not seal correctly
• Gasket tears during thermostat removal
• Cover remains wet after cooling-system servicing

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 682-12414-A1 → Supersedes 682-12414-A0
• 682-12414-A0 → Supersedes 682-12414-00
• 682-12414-00 earlier Yamaha thermostat gasket reference

OEM / Related Numbers

• 682-12414-A1
• 682-12414-A1-00
• 68212414A100
• 682-12414-A0
• 682-12414-00
• 6E5-12411-series related thermostat

Aftermarket / Verified Equivalents

• Sierra: 18-0836
• Recmar: REC682-12414-A1
• Direct-replacement thermostat cover gasket: 682-12414-A1

📦 Condition

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