Thermostat Gasket – Fits Johnson/Evinrude 3-Cyl & 65-75 HP (Replaces OMC 0313416, 313416, 3852120)
Thermostat Gasket – Fits Johnson/Evinrude 3-Cyl & 65-75 HP (Replaces OMC 0313416, 313416, 3852120) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Thermostat Gasket – Fits Johnson/Evinrude 3-Cyl & 65-75 HP (Rep...
Product Details
This Thermostat Gasket – Fits Johnson/Evinrude 3‑Cyl & 65‑75 HP is designed for a precise fit on Johnson/Evinrude 3-Cylinder 60 HP engines (1986–1988) and 65 HP engines (1972–1986). It is also compatible with WSM applications for Johnson/Evinrude/OMC 65–75 HP engines from 1972–1985 and certain Volvo Penta 3.0GL/GS boat outdrives.
It serves as a direct replacement for OEM part numbers 0313416, 313416, and 3852120, and interchanges with multiple aftermarket equivalents including RAREELECTRICAL 515-17, WSM 515-17, and Sierra Marine 18-0929.
- Installs in the engine's cooling system to seal the thermostat housing.
- Made from high-temperature, compression-resistant rubber to create a tight seal.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| OMC / Johnson / Evinrude | 0313416 | OEM reference. |
| OMC / Johnson / Evinrude | 313416 | OEM reference. |
| Volvo Penta | 3852120 | OEM reference, replaces 0313416. |
| RAREELECTRICAL | 515-17 | Aftermarket equivalent. |
| WSM | 515-17 | Aftermarket equivalent. |
| Sierra Marine | 18-0929 / 18-0929-9 | Aftermarket equivalent. |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Johnson/Evinrude, this gasket fits specific 3-cylinder and other models from the 1970s and 1980s. For Volvo Penta, it is commonly used in various 3.0L sterndrive models.
| Brand | Model | Rated HP | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Johnson/Evinrude | 3 Cyl | 60 | 1986–1988 | 0313416, 313416, 3852120 | For thermostat. |
| Johnson/Evinrude | 65 | 1972–1986 | 0313416, 313416, 3852120 | For thermostat. | |
| Johnson/Evinrude | 65-75 | 1972–1985 | 0313416, 3852120 | WSM fitment. | |
| Volvo Penta | 3.0 GL/GS | 3852120 | Used in thermostat repair kit 18-3670. | ||
| Volvo Penta | 3.0GLM-A, 3.0GLM-B, 3.0GLM-C, 3.0GLMMDA, 3.0GLP-A, 3.0GLP-B, 3.0GLP-C, 3.0GLP-D, 3.0GLP-E, 3.0GLP-J, 3.0GLP-N, 3.0GSM-A, 3.0GSM-B, 3.0GSM-C, 3.0GSMBYMCE, 3.0GSMLKD, 3.0GSMNCS, 3.0GSMWTR, 3.0GSP-A, 3.0GSP-B, 3.0GSP-C, 3.0GSPEFS, 3.0GSPLKD, 3.0GSPMDA, 3.0GSPNCS, 3.0GSPWTR | 3852120 | Various Volvo Penta 3.0L models. |
Technical Specs
- Product Type
- Thermostat Gasket
- Installation Location
- Engine Cooling System
- Product Dimensions
- 9.5 x 11.0 x 0.4 in
- Weight
- 1 lb (0.45 kg)
- Material
- High-temperature, compression-resistant rubber
- Design
- Designed to fit tightly between mating surfaces of cooling system components, filling space between surface imperfections.
What’s in the Box
- 1 x Thermostat Gasket
Installation Notes
- Disconnect the battery and ensure the engine is completely cool.
- Locate the thermostat housing and place a drain pan beneath it.
- Carefully drain the engine coolant from the system.
- Unscrew the bolts securing the thermostat housing cover.
- Remove the old thermostat gasket and clean both mating surfaces thoroughly. Ensure they are free of old gasket material, corrosion, and debris.
- Place the new gasket onto the housing, aligning it with the bolt holes.
- Reinstall the thermostat and housing cover, tightening the bolts to the manufacturer's specified torque.
- Refill the cooling system with the appropriate coolant.
- reconnect the battery, start the engine, and carefully check for any leaks around the housing.
Troubleshooting & FAQ
How do I know if my thermostat gasket is failing?
Signs of a failing thermostat gasket include visible coolant leaks around the thermostat housing, engine overheating, or an unusually low coolant level without an obvious leak source. You may also notice dried coolant residue (typically green, orange, or pink) on the engine near the housing.
What's the difference between OEM Part Numbers 0313416 and 3852120?
These part numbers are often used interchangeably. Part number 3852120 (originally a Volvo Penta number) is frequently listed as a replacement or superseding part for the older OMC/Johnson/Evinrude number 0313416. For the applications listed, they refer to the same part dimensionally.
Does this gasket require sealant during installation?
Generally, modern rubber gaskets like this one are designed to be installed dry and do not require additional sealant. Applying sealant can sometimes interfere with a proper seal. Always follow the service manual for your specific engine model.
Can I reuse my old gasket if it looks okay?
No. Thermostat gaskets are single-use, compression-style seals. Once compressed and exposed to heat cycles, they lose their ability to create a reliable seal and should always be replaced whenever the thermostat housing is opened.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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