Thermostat Kit 143F for Johnson Evinrude (5-235 HP) OEM 18-3553 378065 393659

Thermostat Kit for Johnson Evinrude

This thermostat kit opens at 143°F and is designed for Johnson Evinrude outboard engines from 5 to 235 HP, with OEM cross-reference numbers 18-3553, 378065, and 393659.

Overview

The thermostat kit for Johnson Evinrude outboards is a direct replacement that ensures proper engine operating temperature. This kit includes the thermostat and gaskets needed to maintain optimal cooling system performance. It fits a wide range of Johnson Evinrude engines from 5 to 235 HP, making it a versatile choice for marine maintenance.

Built For Performance

• Opens at 143°F for precise temperature regulation
• Direct replacement for OEM part numbers 18-3553, 378065, and 393659
• Includes thermostat and gaskets for a complete kit
• Corrosion-resistant materials for marine environments
• Compatible with 5-235 HP Johnson Evinrude outboard engines

On-The-Job Use

• Replacing worn or stuck thermostats in outboard engines
• Maintaining proper engine temperature during long runs
• Servicing cooling systems in freshwater and saltwater
• Performing routine maintenance on Johnson Evinrude outboards

Specs At A Glance

Good To Know

Q: How does a thermostat work in an outboard engine? A: It opens at the rated temperature to allow coolant flow, preventing overheating and ensuring quick warm-up.

Q: Does this kit fit all Johnson Evinrude engines? A: It fits engines within the 5-235 HP range, but always verify your specific model and serial number for compatibility.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.