SKU: 92128868820

Thermostat Kit with Hoses – Fits Johnson/Evinrude V4 Crossflow 65-140 HP (Replaces 18-3673, 340975, 340976)

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Description

Thermostat Kit with Hoses – Fits Johnson/Evinrude V4 Crossflow 65-140 HP (Replaces 18-3673, 340975, 340976)Thermostat Kit with Hoses Fits Johnson Evinrude V4 Crossflow 65 140 HP This thermostat kit is designed for Johnson Evinrude 2 Stroke V4 Crossflow outboard engines, ranging from 65 HP to 140 HP (including Jet models), for model years 19781995. It provides a reliable solution for maintaining optimal engine operating temperature. This kit serves as a direct replacement for multiple OEM and aftermarket part numbers, including Johnson Evinrude 18 3673,

Thermostat Kit with Hoses – Fits Johnson/Evinrude V4 Crossflow 65-140 HP

This thermostat kit is designed for Johnson/Evinrude 2-Stroke V4 Crossflow outboard engines, ranging from 65 HP to 140 HP (including Jet models), for model years 1978–1995. It provides a reliable solution for maintaining optimal engine operating temperature.

This kit serves as a direct replacement for multiple OEM and aftermarket part numbers, including Johnson/Evinrude 18-3673, Sierra 18-3673, GLM 13270, OMC 434841, and HeuroFosh 18-3673.

  • Includes a complete set of components with both starboard and port hoses for a full replacement.
  • Engineered for direct, hassle-free installation with factory OEM-style fittings.
  • Features thermostats rated for a 143°F (62°C) operating temperature to ensure correct engine performance.

Part Number Cross-Reference

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

Brand Part Number
Johnson/Evinrude 18-3673
Sierra 18-3673
GLM 13270
OMC 434841
HeuroFosh 18-3673

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.

Brand Model Rated HP Stroke Years OEM Part No. Notes
Johnson/Evinrude V4 Crossflow 65 Jet 2-Stroke 1994-1995 340975, 340976, 18-3673
Johnson/Evinrude V4 Crossflow 80 Jet 2-Stroke 1994-1995 340975, 340976, 18-3673
Johnson/Evinrude V4 Crossflow 90 Jet 2-Stroke 1994 340975, 340976, 18-3673
Johnson/Evinrude V4 Crossflow 85 2-Stroke 1978-1980, 1993-1995 340975, 340976, 18-3673
Johnson/Evinrude V4 Crossflow 88 2-Stroke 1984-1995 340975, 340976, 18-3673
Johnson/Evinrude V4 Crossflow 90 2-Stroke 1983-1995 340975, 340976, 18-3673
Johnson/Evinrude V4 Crossflow 100 2-Stroke 1979-1980, 1990-1995 340975, 340976, 18-3673
Johnson/Evinrude V4 Crossflow 100 Commercial 2-Stroke 1984-1989 340975, 340976, 18-3673
Johnson/Evinrude V4 Crossflow 110 2-Stroke 1985-1989 340975, 340976, 18-3673
Johnson/Evinrude V4 Crossflow 112 2-Stroke 1994-1995 340975, 340976, 18-3673
Johnson/Evinrude V4 Crossflow 115 2-Stroke 1978-1995 340975, 340976, 18-3673
Johnson/Evinrude V4 Crossflow 140 2-Stroke 1978-1985 340975, 340976, 18-3673

Technical Specifications

Specification Value
Product Type Thermostat Kit with Hoses
Installation Direct replacement
Connection Factory OEM fit for V4 Crossflow design
Housing Material Aluminum, Plastic
Dimensions 20.4 × 10.3 × 4.2 cm (8.03 × 4.06 × 1.65 inches) - package dimensions
Weight 0.23 kg (8.1 oz)
Fitting Type OEM-style fittings
Operating Temperature 143°F (62°C) thermostat rating
Warranty Manufacturer dependent, typically 1 year
Other Technical Attributes Complete kit with starboard and port hoses

Package Contents

  • 2 x Thermostat (Replaces 393659, 434841, 378065, 508626, 5005440, 18-3543)
  • 2 x Gasket (Replaces 332369, 18-0977)
  • 2 x Thermostat Gasket (Replaces 321932, 18-0675)
  • 2 x Poppet Relief Valve (Replaces 318395, 18-3564)
  • 2 x Grommet (Replaces 321692, 18-2391)
  • 2 x Valve Spring (Replaces 317245, 18-1243)
  • 1 x Starboard Hose (Replaces 340975, 18-70936, 321724)
  • 1 x Port Hose (Replaces 340976, 18-70937)

Installation Guide

  1. Safety First: Disconnect the battery cables before beginning any work.
  2. Drain Coolant: Partially drain the engine's cooling system to a level below the thermostat housing.
  3. Access Housing: Locate and remove the thermostat housing cover(s). This may require removing other components for access.
  4. Remove Old Components: Carefully take out the old thermostats, gaskets, and poppet valve assemblies. Note their orientation.
  5. Remove Hoses: Disconnect and remove the old starboard and port hoses.
  6. Clean Surfaces: Thoroughly clean the gasket mating surfaces on the engine block and housing covers.
  7. Install New Components: Install the new thermostats, springs, poppet valves, and gaskets in the correct order and orientation.
  8. Attach New Hoses: Connect the new starboard and port hoses to their respective fittings, ensuring they are securely clamped.
  9. Reassemble: Reinstall the thermostat housing cover(s) and tighten the bolts to the manufacturer's specified torque.
  10. Refill and Reconnect: Refill the cooling system with the appropriate coolant. Reconnect the battery.
  11. Test for Leaks: Start the engine and let it reach operating temperature. Carefully check for any coolant leaks from the housing or hoses.

Troubleshooting & FAQ

How can I be sure this thermostat kit fits my Johnson/Evinrude engine?
This kit is specifically made for Johnson/Evinrude V4 Crossflow engines from 65-140 HP, manufactured between 1978 and 1995. The most reliable method is to check your engine's model, horsepower, and year against the "Compatible Engine Models" table. Cross-referencing the part numbers (like 18-3673) with your service manual or the old part is also highly recommended.

What is the operating temperature of this thermostat?
The thermostats in this kit are rated for 143°F (62°C). This temperature is specified for these engines to ensure they warm up correctly and maintain optimal temperature during operation, which is critical for performance and fuel efficiency.

What are the signs my old thermostat is failing?
Common symptoms include the engine overheating at various speeds, the temperature gauge reading higher or lower than normal, or the engine taking an unusually long time to warm up. You might also notice coolant leaking from the thermostat housing area.

OEM vs. Aftermarket?
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.

How fast do you ship and how much does it cost?
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.

What is your warranty and return policy?
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.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 92128868820

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ivory6194
Draper, US
★★★★★ 5
great read for those in the church who want to learn more about equality
Format: Kindle
While this book focuses on ableism and racism, I learned a significant amount about how the church has perpetuated ableism over the years and how the founding fathers of our country used religion and ableism as the initial forms of a caste system. Black bodies were seen as inferior and therefore were able in their minds able to be enslaved. This book is a great read for those in the church who want to learn more about equality and how we as a community and church can do better about falling into the trap that we may be "better than." Lamar Hardwick quoted many different authors and theologians, including one who wrote a book about how Jesus was disabled as a result of the crucifixion. This book is great food for thought and I recommend for those who want to learn more about how they and the church view those seen as different. "Racial slavery in the West began by using disability to make chattel slavery a matter of charity rather than a matter of equality. Defining Africans as mentally inferior and effectively disabled allowed for proslavery advocates to appeal to the Christian ethos of benevolence." "The challenge is that beauty is an abstract concept. Our inability to define beauty without using a deficit model stands in contrast to our fundamental beliefs about how God created us. Our origin begins outside of us. An infinitely holy and wise God who creates with intention and intimacy placed us in the world. Acknowledging God's creative genius challenges us to believe that God does not create anything that is not beautiful in its own way."
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Reviewed in the United States on June 11, 2024
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Lindsay L. O’Connor
Omaha, US
★★★★★ 5
A must-read for Christians seeking a more robust & liberating theology
Format: Paperback
This is a powerful book and an important challenge to the status quo in modern U.S. American Christianity (and beyond, I suspect, but I will speak from my own context). I appreciated Hardwick’s illumination of the direct link between ableism and racism, which he explained in a way I had never heard before. I also found his interpretation and application of scripture from a disability theology lens to be insightful. He uses a framework that shows “how ableism in America led to the creation of images, idols, and institutions that perpetuate both disability and racial discrimination.” I’m fairly new to learning about disability theology and found this book to be a helpful, accessible read that challenged some of the core assumptions many of us inherited from our white western evangelical upbringing. Hardwick combines his own life experience as a Black disabled pastor with his thought-provoking engagement with scripture to call Christians to a more just and liberating theology. Disability theology is not simply a means of including disabled folks in the Christian community but is an essential lens through which we will see Jesus, others, and ourselves in a completely new light that is transformative.
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Reviewed in the United States on June 13, 2024
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Amazon Customer
Houston, US
★★★★★ 5
Worth buying again and/ or for gifts
Format: Paperback
I am pro guns. I thought I knew quite a bit about them. This book was a genuine eye opener!!!!. It seemed to share so much information and stories, yet in a non judgemental way. I actually gave this book to a friend, but I will get another copy for myself. It is amazing reading things that now seem so obvious, yet I never thought about them. I approve of the Christian theme as well. Again without judgment or a lofty aditude. I do recomend
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Reviewed in the United States on November 26, 2025
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D. Mourn
Phoenix, US
★★★★★ 5
Guns and a Christlike God
Format: Kindle
I heartily give this book 5 stars for being such a rich, balanced mix of real life stories, black-smithing analogy, published statistics, and the unabashed challenge of faithFULLY following Christ who revealed how we were created to be unconditionally loving, self-giving, and forgiving. The sad realities of America, the richest and most powerful nation the world has known, is scarred by the problems of guns AND heart. This intelligent and humble presentation of information is a very helpful expose’ in exploring the intersection of faith and guns in America. I have a bias in that I know (and admire) Mike Martin, am a fan of Shane Claiborne, and am on a journey with Christ which finds much truth and wisdom within the Anabaptist tradition. I would like to counter any critique of this book which insinuates oversimplification and misrepresentation through selective/incomplete methodology. I’m glad this book is “bite-size” to reach its stated, intended audience of just about everyone, of every faith tradition, who is weary of violence. The writers are quite capable of presenting a dreadfully long and robust exploration of the scriptures but wisely chose to hold Jesus, his teaching, and the cross as a focal figure of faith who advocated and lived and died non-violence as God’s nature. I hesitate to put words in their mouths but am sure they would love to expose the full context and textures of the prophetic plowshare visions, and I would welcome it. They might just mention the strong strands of the early church fathers who explicitly read the prophetic telling of God’s/Jesus’ wrath and judgment—not as evidence for a violent, human like God to be feared—but as metaphor for the suffering humanity brings upon itself. Just as Paul rhetorically blasted, early in Romans, God turns us over to our ways to wallow in the consequences (we judge and punish ourselves) as we reject God and that which we were created to be. So, perhaps the authors fail by not pointing to scholarly works which spell out with the detail necessary to fully understand the pacifist’s theology—the list is long—however they successfully create the spirit of a movement for everyone by not getting bogged down with a couple proof-texts (we must study their contexts) which seemingly challenge the ubiquitous teachings and lives of Jesus, the New Testament writers, and the pre-Constantinian church. “Cherry-picking”, though often intended to undermine, is a noble compliment as one studies the hermeneutical method of Jesus who also “cherry-picked” the varied voices of the Hebrew testament to shape his gospel of peace. We all cherry-pick and contexts bend toward OUR contexts, but toward what end—to look like Jesus, peace, and the way of the cross? I highly recommend this book: With faith set aside completely for its well referenced guide in understanding America’s inclination toward violence and the idolatrous place guns, constitutional faith, our entertainment, our historical heroes, and the NRA play in it; and with faith at center whose Jesus discipled a way of heart which carries a cross to establish peace and justice—not a sword/gun. Jesus forgave and loved as the transformative powers which Jesus presented as our way of hope.
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Reviewed in the United States on March 12, 2019
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Sue Schneider
Boise, US
★★★★★ 5
brilliant book!
Format: Paperback
Highly recommend this book to everyone who wants to go beyond "thoughts and prayers" in addressing the deep issue of gun violence in our nation. Well-written and illustrated, with helpful graphs and statistics. Non judgy, whether you are a gun owner or not.
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Reviewed in the United States on March 11, 2024

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