New Thermostat for Johnson Evinrude 9.9 15 40 48 50 hp 2 str 143° 436195 18-3561

Thermostat for Johnson Evinrude

This thermostat for Johnson Evinrude outboard engines regulates engine temperature by opening at 143 degrees Fahrenheit. Designed for 2-stroke models from 9.9 to 50 horsepower, it ensures proper cooling during operation. Replaces OEM part numbers 436195 and 18-3561.

Overview

This thermostat for Johnson Evinrude maintains optimal engine temperature in 2-stroke outboard motors. It is a direct replacement part that responds to coolant temperature to control flow. Ideal for boat owners and marine mechanics servicing Johnson Evinrude engines.

Built For Performance

• Opens at 143 degrees Fahrenheit for precise temperature control
• Constructed from corrosion-resistant materials for marine environments
• Direct fit design for seamless installation
• Compatible with multiple engine sizes from 9.9 to 50 hp
• Meets OEM specifications for reliable operation

Fits These Machines

• for Johnson Evinrude 9.9 hp 2-stroke
• for Johnson Evinrude 15 hp 2-stroke
• for Johnson Evinrude 40 hp 2-stroke
• for Johnson Evinrude 48 hp 2-stroke
• for Johnson Evinrude 50 hp 2-stroke

On-The-Job Use

• Maintains proper engine temperature during long fishing trips
• Ensures reliable cooling in saltwater and freshwater environments
• Helps prevent overheating and engine damage in heavy use
• Used by marine mechanics for routine outboard maintenance

Specs At A Glance

Good To Know

Q: Will this thermostat fit my 25 hp Johnson?

A: This thermostat is designed for 9.9, 15, 40, 48, and 50 hp models, so it may not fit a 25 hp. Always verify engine specifications before ordering.

Q: What is the correct orientation for installation?

A: The thermostat should be installed with the spring side facing up, following the original placement. Confirm with your service manual.

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