Genuine Yamaha OEM Thermostat 6EK-12411-00-00 – Fits 2014-2026+ F115, LF115, VF115 115HP 4-Stroke Outboards – Cylinder Head / Cooling System Replacement Part

Authentic Yamaha OEM Thermostat (P/N: 6EK-12411-00-00) – Direct factory replacement for precise temperature regulation and reliable cooling in your Yamaha 115HP 4-stroke outboard. This high-quality brass/copper wax-element thermostat (with stainless spring, molded rubber seal, and built-in jiggle/bleed valve) opens at approximately 60°C (140°F) to maintain optimal engine operating temperature, prevent overheating, and ensure efficient performance.

Replace your thermostat during routine cooling system service (recommended every 100-300 hours or as needed) to avoid issues like poor warm-up, erratic temperature readings, or overheating. This genuine part guarantees perfect fit, superior durability, and maximum corrosion resistance in marine environments – far better than generic alternatives.

Key Benefits:

• OEM Quality – Engineered and tested by Yamaha for exact specs and long-term reliability
• Precise Temperature Control – Opens at ~140°F for fast warm-up and consistent cooling
• Easy Installation – Standard drop-in replacement in the thermostat housing (often includes gasket/seal)
• Prevents Engine Damage – Maintains proper coolant flow to protect against hot spots and wear

Fitment & Compatible Models: This thermostat fits a wide range of 2014–2020+ Yamaha 115HP 4-stroke outboards (F115, LF115 counter-rotating, VF115 V MAX SHO series). It is commonly referenced in Cylinder Crankcase / Cylinder Head sections and Scheduled Service Parts diagrams.

Primary compatible models and years (based on Yamaha parts catalogs and dealer listings):

• F115 Series (standard shaft): F115XB, F115JB, F115LB (2014–2020+)
• LF115 Series (counter-rotating): LF115XB (2014–2020+)
• VF115 Series (V MAX SHO/high-output): VF115LA, VF115XA (2015–2020+)

Specific examples include:

• 2014–2026+ F115XB / F115JB / F115LB
• 2014–2026+ LF115XB
• 2015–2026+ VF115LA / VF115XA

(Also cross-compatible with some F130/LF130 models in similar eras – verify your serial number or Yamaha parts lookup for exact match. Not for pre-2014 F115 models, which typically use older part numbers like 60V-12411-00-00.)

This part appears in Yamaha's official exploded views for Cylinder Crankcase 1 and Scheduled Service Parts on models from 2014 onward. Always consult your owner's manual, Yamaha dealer, or hull/engine serial number for confirmation.

Stock up on this essential maintenance item – trusted by boaters and mechanics for keeping Yamaha 115HP engines running cool and strong. Fast shipping on genuine Yamaha parts! If you're troubleshooting overheating or planning a full cooling system refresh, pair it with a new gasket, impeller, and hoses for best results.