Cylinder Head Gasket – Fits Johnson/Evinrude V6 150-235 HP (Replaces 335360/766779)
Cylinder Head Gasket – Fits Johnson/Evinrude V6 150-235 HP (Replaces 335360/766779) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Cylinder Head Gasket – Fits Johnson/Evinrude V6 150-235 HP (Replace...
Product Details
This aftermarket Cylinder Head Gasket is designed for Johnson/Evinrude Crossflow V6 outboard motors ranging from 150 HP to 235 HP, manufactured between 1976 and 1992. It creates a critical seal between the engine block and cylinder head to prevent combustion chamber leaks and ensure optimal performance.
It serves as a direct replacement for Johnson/Evinrude part number 766779 and its superseded OMC part number 335360.
- Installation: Mounts between the engine cylinder block and cylinder head.
- Function: Seals the combustion chamber, preventing leakage of gases and coolant.
- Compatibility: Engineered for gasoline-fueled V6 Crossflow engines.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number | Superseded By | Notes |
|---|---|---|---|
| OMC | 335360 | 766779 | |
| Johnson/Evinrude | 766779 | Current part number. |
Engine & Model Compatibility
Confirm your engine model and year in the table below to ensure accurate fitment.
This part is designed for a range of Johnson/Evinrude Crossflow V6 engines as well as specific models listed.
| Brand | Model | Rated HP | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Johnson/Evinrude | Crossflow V6 | 150 | 1976–1992 | 335360/766779 | Part 335360 superseded by 766779 |
| Johnson/Evinrude | Crossflow V6 | 155 | 1976–1992 | 335360/766779 | Part 335360 superseded by 766779 |
| Johnson/Evinrude | Crossflow V6 | 175 | 1976–1992 | 335360/766779 | Part 335360 superseded by 766779 |
| Johnson/Evinrude | Crossflow V6 | 185 | 1976–1992 | 335360/766779 | Part 335360 superseded by 766779 |
| Johnson/Evinrude | Crossflow V6 | 200 | 1976–1992 | 335360/766779 | Part 335360 superseded by 766779 |
| Johnson/Evinrude | Crossflow V6 | 235 | 1978–1979 | 335360/766779 | Part 335360 superseded by 766779 |
| Johnson/Evinrude | J150TXEIE | 150 | 335360/766779 | Specific compatible model | |
| Johnson/Evinrude | J155WTLESM | 155 | 335360/766779 | Specific compatible model |
Technical Specs
- Product Type
- Cylinder Head Gasket
- Installation
- Engine Cylinder Head
- Fuel Type
- Gasoline
- Housing Material
- Metal
- Dimensions
- 1.13" L x 16.0" W x 6.0" H
- Other Technical Attributes
- Seals between cylinder block and cylinder head, prevents combustion chamber leakage
What’s in the Box
- 1 x Cylinder Head Gasket (Replaces 335360/766779)
Installation Notes
- Disconnect the battery and drain the engine's cooling system completely.
- Carefully remove the cylinder head cover, spark plugs, and any components obstructing the cylinder head.
- Loosen and remove the cylinder head bolts in the sequence specified by the manufacturer's service manual to prevent warping.
- Gently remove the old head gasket. Avoid using tools that could gouge the aluminum surfaces.
- Thoroughly clean both the cylinder block and cylinder head mating surfaces to remove all old gasket material and carbon deposits.
- Position the new gasket correctly on the engine block; ensure it is not installed upside down or backward.
- Carefully place the cylinder head back onto the block.
- Install the head bolts and torque them in the correct pattern and sequence to the manufacturer's specifications.
- Reinstall all previously removed components, refill the cooling system, and reconnect the battery.
- Start the engine and check for any leaks around the gasket area.
Troubleshooting & FAQ
How do I know if this gasket will fit my specific engine model?
This gasket is designed for the Johnson/Evinrude V6 Crossflow series (150-235 HP) from 1976-1992. The best way to confirm fitment is to check your engine's OEM part number against the references provided in our Part Number Matrix and Compatibility table. If your model or part number is listed, it will fit.
What are the typical signs of a failing head gasket?
Common symptoms include engine overheating, loss of power, white smoke from the exhaust (burning coolant), milky or foamy engine oil, and bubbling in the radiator or coolant reservoir. These signs indicate a leak between the combustion chamber and coolant passages.
Do these gaskets need to be replaced in pairs?
No, this listing is for a single gasket. Since V6 engines have two cylinder banks, it is often recommended to replace both head gaskets at the same time to ensure an even seal and prevent future issues, but it is not required. This package contains one gasket.
Is any sealant required during installation?
Generally, modern head gaskets like this one are designed to be installed dry without any additional sealants. Applying sealant can interfere with the gasket's ability to seal properly. Always follow the specific instructions in your engine's service manual.
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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