384719 Thermostat for Johnson Evinrude | JLM Marine

Thermostat for Johnson Evinrude 85-135 HP 2-Stroke Outboard | OEM 384719

This high-quality aftermarket thermostat (Vernatherm) is engineered to fit Johnson and Evinrude 2-stroke outboard engines from 85 HP to 135 HP, covering model years 1971–1977. Designed as a direct replacement for OEM part number 384719 / 0384719, it ensures proper cooling system regulation and reliable engine performance across a wide range of vintage outboard applications.

Whether you're servicing an older 85 HP, 100 HP, 115 HP, 125 HP, or 135 HP Evinrude outboard, this thermostat provides dependable temperature control to protect your engine from overheating and maintain optimal operating conditions.

• Direct replacement for Evinrude OEM part 384719 / 0384719
• Fits exhaust housing assemblies on Johnson/Evinrude 2-stroke engines 85–135 HP (1971–1977)
• Ensures proper cooling system operation and temperature regulation

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.

Technical Specifications

Package Contents

• 1 × Thermostat (Vernatherm) for Johnson Evinrude Outboard

Installation Guide

1. Ensure the outboard engine is completely cool and disconnect the fuel line for safety.
2. Locate the exhaust housing assembly where the thermostat is installed; refer to your engine's service manual for exact position.
3. Remove the necessary bolts or fasteners securing the housing cover. Keep all hardware organized for reassembly.
4. Carefully remove the old thermostat (vernatherm) from its seat in the exhaust housing.
5. Clean the housing cavity and sealing surfaces thoroughly, removing old gasket material or debris.
6. Install the new thermostat into the housing, ensuring proper orientation per OEM specifications.
7. Replace any gaskets or O-rings as needed to ensure a leak-free seal.
8. Reinstall the housing cover and torque all fasteners to manufacturer specifications.
9. Reconnect the fuel line and perform a visual inspection for any loose connections.
10. Start the engine and monitor operating temperature to confirm proper thermostat function.
11. Check for coolant leaks around the housing after the engine reaches normal operating temperature.
12. If any issues arise, shut down immediately and re-inspect the installation.

Troubleshooting & FAQ

Q: How do I confirm this thermostat fits my Johnson or Evinrude engine?
A: Cross-reference your engine model number and year with the compatibility table above. This thermostat fits Evinrude 2-stroke outboards from 85 to 135 HP manufactured between 1971 and 1977. Verify your engine's exhaust housing component matches one of the listed models.

Q: What are the signs that my thermostat needs replacement?
A: Common symptoms include engine overheating, inconsistent operating temperature, steam from the engine, or a continuous high-temperature alarm. If your cooling system is sluggish or your engine runs too hot or too cold, the thermostat may be stuck open or closed.

Q: How often should I replace the thermostat on my outboard?
A: Thermostats should be inspected annually and replaced every 2–3 years or as recommended in your engine's service manual. If you notice irregular temperature behavior or after any cooling system service, replace the thermostat as a preventive measure.

Q: Can I install this thermostat myself, or do I need a mechanic?
A: If you have basic mechanical skills and the proper tools, you can install this thermostat yourself by following the Installation Guide above. However, professional installation is recommended to ensure correct orientation, proper torque, and a leak-free seal.

Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.