Thermostat 62°/143°F – Fits Johnson/Evinrude 9.9–300HP Two-Stroke Outboards (Replaces 0778199, 0394411) No Minimum Order

Thermostat 62°/143°F – Fits Johnson/Evinrude 9.9–300HP Two-Stroke Outboards (Replaces 0778199, 0394411)

This thermostat is designed for a wide range of Johnson/Evinrude 9.9–300HP 2-Stroke outboards manufactured between 1985 and 1995. It is compatible with various engine configurations, from two-cylinder to eight-cylinder models, ensuring reliable temperature regulation for optimal engine performance.

This component is a direct replacement for OMC/Johnson/Evinrude part numbers 394411 / 0394411 and 778199 / 0778199. It also cross-references with Sierra 18-1506 and GLM 13190.

• Engineered to open at 62°C (143°F) to maintain correct operating temperature.
• Manufactured with corrosion-resistant materials for durability in marine environments.
• Includes one thermostat for a complete replacement.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below. For Johnson/Evinrude owners, here’s a guide to help you identify your engine’s serial/model: Johnson/Evinrude Serial Number Guide.