Head Gasket and Water Jacket Gasket Set – Fits Johnson/Evinrude V4 85-140 HP (Replaces 318358, 318335)

$19.99

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Head Gasket and Water Jacket Gasket Set – Fits Johnson/Evinrude V4 85-140 HP (Replaces 318358, 318335) is backordered and will ship as soon as it is back in stock.

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Product Details

This Head Gasket and Water Jacket Gasket Set – Fits Johnson/Evinrude V4 88–140 HP (Replaces 318358, 318335) is designed for Johnson/Evinrude V4 crossflow outboard engines from 1973 to 1996, covering models from 65 Jet to 140 HP. This kit includes the essential head and water jacket cover gaskets for servicing one side of the V4 engine.

It serves as a direct replacement for Johnson/Evinrude part numbers 318358 and 318335, and interchanges with Sierra 18-2956/18-2873, GLM 33540/33530, and Mallory 9-63828/9-60454.

Includes both head and water jacket gaskets for single-side service.
Constructed from a durable non-asbestos material with a metal core.
Position-specific installation; two sets are required for a complete V4 engine rebuild.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Brand	Part Number
Johnson/Evinrude	318358, 318335
Sierra	18-2956, 18-2873
GLM	33540, 33530
Mallory	9-63828, 9-60454

Engine & Model Compatibility

Confirm your engine model/year in the table below.

This set fits the following Johnson/Evinrude V4 Crossflow models.

Model	Rated HP	Stroke	Years	OEM Part No.	Notes
V4 Crossflow	65 Jet	2-Stroke	1991–1995	318358, 318335	2 gasket sets required per engine
V4 Crossflow	75	2-Stroke	1960–1965	318358, 318335	2 gasket sets required per engine
V4 Crossflow	80 Jet	2-Stroke	1991–1996	318358, 318335	2 gasket sets required per engine
V4 Crossflow	85	2-Stroke	1979–1980, 1991–1995	318358, 318335	2 gasket sets required per engine
V4 Crossflow	88	2-Stroke	1987–1995	318358, 318335	2 gasket sets required per engine
V4 Crossflow	90	2-Stroke	1981–1995	318358, 318335	2 gasket sets required per engine
V4 Crossflow	100	2-Stroke	1979–1995	318358, 318335	2 gasket sets required per engine
V4 Crossflow	100 Commercial	2-Stroke	1979–1995	318358, 318335	2 gasket sets required per engine
V4 Crossflow	1600CC	2-Stroke	1988	318358, 318335	2 gasket sets required per engine
V4 Crossflow	110	2-Stroke	1986–1989	318358, 318335	2 gasket sets required per engine
V4 Crossflow	115	2-Stroke	1973–1995	318358, 318335	2 gasket sets required per engine
V4 Crossflow	135	2-Stroke	1973–1976	318358, 318335	2 gasket sets required per engine
V4 Crossflow	140	2-Stroke	1977–1984	318358, 318335	2 gasket sets required per engine
V4 Crossflow	1.6L	2-Stroke	1983–1990	318358, 318335	2 gasket sets required per engine

Technical Specs

Product Type: Engine Gasket Set
Installation: Position-specific (see engine compatibility)
Material: Non-asbestos gasket with metal skeleton
Color: Black
Package Contents: 1x Head Gasket, 1x Water Jacket (Cover) Gasket
Warranty: 1 Year

What’s in the Box

1 x Head Gasket (Replaces 318358)
1 x Water Jacket/Cover Gasket (Replaces 318335)
Note: This kit services one cylinder bank. Two sets are required for a complete V4 engine.

Installation Notes

Disconnect the battery and fuel lines for safety.
Drain the engine coolant completely.
Remove the engine cover and any components obscuring the cylinder head and water jacket cover.
Carefully unbolt and remove the water jacket cover, followed by the cylinder head. Keep track of bolt order.
Thoroughly clean both the engine block and head surfaces. Ensure they are free of old gasket material, oil, and debris.
Position the new head gasket correctly on the engine block. Do not use any sealant unless specified by the manufacturer's service manual.
Reinstall the cylinder head and torque the bolts to the manufacturer's specifications in the correct sequence.
Place the new water jacket gasket and reinstall its cover, tightening bolts to the specified torque.
Reconnect all previously removed components, refill the coolant, and re-attach fuel lines and the battery.
Start the engine and check for any leaks around the gasket areas.

Troubleshooting & FAQ

How many sets do I need for a complete V4 engine service?

You need to purchase two of these gasket sets. This package contains one head gasket and one water jacket gasket, which is enough for one side (one cylinder bank) of a V4 engine. A complete service requires replacing the gaskets on both sides.

Will this fit my V6 or a non-Crossflow engine?

No, this set is specifically designed for V4 Crossflow engines listed in the compatibility table. It will not fit V6, looper, or any other engine architectures. Always verify your engine model and year before ordering.

What are the signs of a failed head gasket?

Common symptoms include engine overheating, loss of compression in one or more cylinders, visible water or coolant in the oil (milky appearance), white smoke from the exhaust, or bubbles in the radiator/coolant reservoir.

Do I need to use sealant with these gaskets?

Generally, no. These gaskets are designed to seal without any additional chemical sealants. Applying sealant can sometimes interfere with a proper seal. Always follow the specific instructions in your engine's official service manual.

Is this kit for the cylinder head and the cover plate?

Yes. This kit includes the main cylinder head gasket (which sits between the cylinder block and head) and the water jacket cover gasket (for the outer plate that covers the water passages around the cylinders).

What is the difference between OEM and this aftermarket part?

This listing is an aftermarket replacement, not an OEM component. It is engineered to meet or exceed OEM specifications using comparable high-quality materials. Our parts are manufactured in an ISO 9001 certified facility and are batch-inspected to ensure reliable performance and fitment.

How fast is shipping and what does it cost?

We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free to most locations, with expedited options available at checkout for an additional cost where applicable.

What is the warranty and return policy?

This product is covered by a 1-year warranty against manufacturing defects under normal marine use. If you encounter an issue, please contact our support team with your order details. Returns are accepted within our standard window if the part is unused and in its original packaging. See our policy page or reach out for instructions.

Safety & Important Info

Verify images and specifications against your original part before ordering. If anything differs—even if your model appears compatible—do not purchase.
This is an aftermarket replacement component, not an OEM part.
Professional installation is recommended for safety and optimal performance.

About Sea Sierra

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