Yamaha - Thermostat Cylinder Crankcase Cover Gasket - F9.9-2 T9.9-2 F15 F25 T25 F30 F40 F50 T50 F60 T60 F70 - 62Y-12414-00-00

On smaller Yamaha four-strokes, the cooling system has to stay sealed tight for the thermostat to do its job. This thermostat cylinder crankcase cover gasket sits right where the thermostat housing meets the engine, keeping water passages sealed and flowing correctly. When you're servicing the thermostat or opening the housing, it's one of those parts you replace without thinking twice. It is a small gasket, but it plays a big role in keeping these engines running at the right temperature.

Key Features

• Thermostat Housing Seal – Seals the thermostat cover to maintain proper cooling system pressure and water flow.
• Exact Yamaha Fit – Manufactured to match original factory dimensions for reliable installation.
• Heat Resistant Material – Built to handle continuous engine heat and cooling system exposure.
• Essential During Thermostat Service – Recommended replacement whenever the thermostat housing is removed.

Engine & Boat Compatibility

F9.9 - 2005-2006
F15 - 1998-2006
F25 - 1999-Current
F30 - 2001-Current
F40 - 2000-Current
F50 - 1995-Current
F60 - 2002-Current
F70 - 2010-Current
T9.9 - 2005-2006
T25 - 2001-Current
T50 - 1996-Current
T60 - 2003-Current

FAQ

Q: When should this gasket be replaced?
A: Any time the thermostat cover is removed for inspection or replacement, installing a new gasket helps prevent cooling system leaks.

Q: What happens if this gasket fails?
A: A damaged gasket can allow water to leak from the thermostat housing, which may cause overheating or inconsistent engine temperature.

Q: Can I reuse the old gasket if it looks fine?
A: It is best not to reuse it. Once compressed, gaskets often do not reseal properly and can lead to small cooling system leaks.

Q: Is sealant required during installation?
A: Typically this gasket installs dry, but always follow Yamaha service guidelines for your specific engine model.

Q: Is this gasket suitable for saltwater engines?
A: Yes. It is designed for Yamaha outboards operating in both freshwater and saltwater when installed correctly.

• Supersessions
  62Y-12414-01-00, 62Y-12414-01-00, 65W-12414-00-00, 6H3-12414-00-00, 6H3-12414-A1-00
• Engine Application
  • F9.9 - 2005-2006
  • F15 - 1998-2006
  • F25 - 1999-Current
  • F30 - 2001-Current
  • F40 - 2000-Current
  • F50 - 1995-Current
  • F60 - 2002-Current
  • F70 - 2010-Current
  • T9.9 - 2005-2006
  • T25 - 2001-Current
  • T50 - 1996-Current
  • T60 - 2003-Current