The OMC 0765580 Thermostat Assembly is a genuine OEM replacement thermostat designed for Johnson and Evinrude outboard motors. Operating at 143°F, this thermostat assembly regulates coolant flow to maintain optimal engine operating temperature, protecting your outboard from the damaging effects of overheating or running too cold.
This thermostat assembly is a direct factory replacement, ensuring proper fit and function without modification. It is compatible with a wide range of Johnson and Evinrude V4, V6, and V8 looper and crossflow outboard engines ranging from 60 HP to 300 HP, as well as select OMC Sea Drive models.
Key Features:
- Genuine OEM OMC/BRP/Johnson/Evinrude factory part
- 143°F (62°C) operating temperature rating
- Direct OEM replacement — no modifications required
- Compatible with V4, V6, and V8 looper outboard configurations
- Also cross-references part numbers: 0329766, 0394409, 0434137
Compatible engine applications include Johnson and Evinrude outboards from 60 HP through 300 HP (1985–1993), including 60, 65, 70, 75, 100, 120, 125, 140, 185, 200, 225, 250, 275, and 300 HP models, as well as select OMC Sea Drive units. Replacing a faulty or worn thermostat is one of the most cost-effective ways to restore proper cooling system performance and extend engine life.
