Thermostat Kit for Johnson/Evinrude V4 Crossflow Outboard Engines, 143°F, 65–140 HP
Thermostat Kit for Johnson/Evinrude V4 Crossflow Outboard Engines, 143°F, 65–140 HP is backordered and will ship as soon as it is back in stock.
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Thermostat Kit for Johnson/Evinrude V4 Crossflow Outboard Engines, ...
Thermostat Kit for Johnson/Evinrude V4 Crossflow Outboard Engines, 143°F, 65–140 HP is backordered and will ship as soon as it is back in stock.
Product Details
This complete aftermarket thermostat kit is designed for Johnson and Evinrude V4 Crossflow outboard engines using a dual-thermostat cooling system. The thermostats are rated at 143°F (62°C) and are intended for applications ranging from 65 HP and 80 HP Jet models through 80–140 HP V4 Crossflow engines. Confirm the engine's Crossflow design and the required parts before ordering.
The kit uses two 143°F thermostats and includes the associated housing gaskets, grommets, thermostat gaskets, and pressure-relief springs required for a complete thermostat service. It is an aftermarket replacement and is not an OEM-branded component.
- For Johnson/Evinrude V4 Crossflow outboard engines.
- Two stainless-steel thermostats with a 143°F (62°C) rating.
- Service components are supplied for both thermostat positions.
- Not identified for 60° V4 or other non-Crossflow cooling systems.
Part Number References
These references identify the aftermarket kit or cataloged replacement references. Verify the application using your engine model and service information before purchase.
| Brand or Reference | Part Number | Use |
|---|---|---|
| Sierra Marine | 18-3673 | Thermostat kit reference |
| GLM | 13270 | Aftermarket kit reference |
| Sierra Marine | 18-3673D | Reference listed for the 18-3673 kit |
Engine & Model Compatibility
This kit is listed for Johnson/Evinrude V4 Crossflow outboard engines. The company application information identifies 65 HP, 80 HP Jet, and 80–140 HP applications. Exact fitment can vary by model, year, and engine configuration, so compare the original thermostat assembly and consult the appropriate service manual before installation.
| Brand | Engine Architecture | Application Range | Stroke | Thermostat Rating | Notes |
|---|---|---|---|---|---|
| Johnson/Evinrude | V4 Crossflow | 65 HP | 2-Stroke | 143°F (62°C) | Verify the individual model and cooling-system configuration. |
| Johnson/Evinrude | V4 Crossflow | 80 HP Jet | 2-Stroke | 143°F (62°C) | Confirm the engine is a V4 Crossflow design. |
| Johnson/Evinrude | V4 Crossflow | 80–140 HP | 2-Stroke | 143°F (62°C) | Check the model number and original thermostat parts before ordering. |
Technical Specifications
- Product Type
- Marine outboard thermostat kit
- Application
- Johnson/Evinrude V4 Crossflow engines
- Thermostat Quantity
- 2
- Thermostat Rating
- 143°F (62°C)
- Thermostat Material
- Stainless steel
- Cooling System
- Dual-thermostat system
- Product Status
- Aftermarket replacement
What's in the Box
- 2 x 143°F stainless-steel thermostats
- 2 x Housing gaskets
- 2 x Grommets
- 2 x Thermostat gaskets
- 2 x Pressure-relief springs
Installation Notes
- Disconnect the battery, place the engine in a stable position, and allow it to cool completely.
- Locate the thermostat housings and record the orientation of the existing thermostats, gaskets, grommets, and pressure-relief components.
- Remove the thermostat covers and carefully remove the old service parts.
- Clean the cover and cylinder-head mating surfaces. Remove old gasket material and check for corrosion or damage.
- Install the new grommets, pressure-relief springs, housing gaskets, thermostat gaskets, and thermostats in the correct positions and orientation.
- Reinstall the covers and tighten the fasteners according to the engine manufacturer's service-manual procedure and torque specifications.
- Run the engine using the proper water supply, check for leaks, and confirm normal cooling-system operation before returning the boat to service.
Installation should be performed by a qualified marine technician when the correct component orientation or engine-specific procedure is uncertain.
Troubleshooting & FAQ
How do I confirm that this kit fits my engine?
Confirm that the engine is a Johnson or Evinrude V4 Crossflow model and compare the original thermostat assembly with the kit contents. The listed applications include 65 HP, 80 HP Jet, and 80–140 HP engines, but exact fitment may depend on the model and configuration.
What thermostat temperature does this kit use?
The thermostats are rated at 143°F (62°C). Use the temperature rating specified for your engine and do not substitute a different rating without guidance from the service manual.
Why are there two thermostats?
The listed V4 Crossflow application uses a dual-thermostat arrangement. The kit includes two thermostats and matching service components for the two thermostat positions.
What components are included besides the thermostats?
The kit includes two housing gaskets, two grommets, two thermostat gaskets, and two pressure-relief springs, in addition to the two 143°F thermostats.
Will this fit a 60° V4 or Looper engine?
This product is identified for V4 Crossflow engines. Do not assume compatibility with a 60° V4, Looper, or another cooling-system design. Verify the engine architecture and part requirements first.
Is this an OEM component?
No. This is an aftermarket replacement kit intended for the listed Johnson/Evinrude V4 Crossflow applications.
Should I replace the seals and springs at the same time?
Yes. The kit is supplied with the related gaskets, grommets, and pressure-relief springs so the thermostat service can be completed with new service components rather than relying on worn or damaged parts.
Safety & Important Information
- Work only on a cool engine and follow the engine manufacturer's service procedures.
- Verify the V4 Crossflow architecture, model information, and original parts before ordering.
- Do not use this listing to substitute for the engine service manual or a qualified technician's fitment confirmation.
- This is an aftermarket replacement, not an OEM-branded component.
About Sea Sierra
- Marine Parts Focus — Replacement components for common outboard maintenance and repair applications.
- Application-Focused Listings — Product information is organized around engine architecture, component function, and service requirements.
- Practical Service Support — Always compare the original component and consult the applicable service documentation before installation.
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