Thermostat 143F for Johnson Evinrude (5-235 HP) 18-3672 5005440 434841 378065

Thermostat 143F for Johnson Evinrude

This 143-degree Fahrenheit thermostat for Johnson Evinrude outboards references OEM cross-reference numbers 18-3672, 5005440, 434841, and 378065, suitable for 5-235 HP engines.

Overview

Designed for Johnson Evinrude outboard engines from 5 to 235 HP, this thermostat opens at 143°F to regulate coolant flow. It ensures consistent operating temperatures, reducing wear and preventing overheating. This thermostat for Johnson Evinrude delivers dependable thermal management for marine use.

Built For Performance

• Opens at 143°F for precise temperature control
• Compatible with a wide range of Johnson Evinrude outboards from 5 to 235 HP
• Made from durable materials to withstand harsh marine conditions
• Engineered to match OEM thermal specifications
• Ensures quick warm-up and stable operation

On-The-Job Use

• Replacing faulty thermostats in Johnson Evinrude outboards
• Maintaining optimal engine temperature during trolling or high-speed runs
• Preventing overheating in warm climates or heavy loads
• Improving fuel efficiency by keeping the engine at the right temperature

Specs At A Glance

Good To Know

Q: How does this thermostat benefit my engine? A: By opening at 143°F, it allows the engine to reach optimum operating temperature quickly and prevents overheating under heavy load.

Q: Can I use this on a smaller outboard? A: Yes, it fits Johnson Evinrude models from 5 to 235 HP, but always verify your engine's specific part numbers.

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