Thermostat Repair Service Kit For Yamaha 4 Stroke Outboard Motors 9.9 15 25 30 40 50 60 70 HP Replaces 66M-12411 6G8-12411 62Y-12414 6H3-12414 Sierra 18-3541 No Hassle Easy Install

Thermostat Repair Kit for 4-Stroke Outboards - Single Kit
✔️ Replaces 66M-12411, 6G8-12411, 62Y-12414, 6H3-12414

This thermostat repair kit is designed for 4-stroke outboard motors and is typically used to restore cooling system function on engines in the 9.9-70 HP range, including F9.9, FT9.9, F15, F25, FT25, F30, F40, F50, FT50, F60, FT60, F70. It replaces OEM numbers such as 66M-12411, 6G8-12411, 62Y-12414, 6H3-12414, Sierra 18-3541, and Mallory 9-43037.

✅ Fits 9.9-70 HP four-stroke outboard motors (F9.9, FT9.9, F15, F25, FT25, F30, F40, F50, FT50, F60, FT60, F70)
✅ Replaces OEM numbers: 66M-12411, 6G8-12411, 62Y-12414, 6H3-12414, Sierra 18-3541, Mallory 9-43037
✅ Package includes thermostat 66M-12411, thermostat housing gasket 62Y-12414, thermostat seal 688-12412
✅ Easy install with common hand tools

💡 What is a thermostat repair kit for 4-stroke outboard motors used for?

Handy for keeping engines from overheating on boats.

- Restores thermostat function with ready-to-install parts - Replaces multiple OEM numbers for flexible maintenance - Includes thermostat, gasket, and seal for simple installation