Cylinder Head Gasket Set – Fits Johnson/Evinrude 18-35 HP (Replaces 765012, 327674)

Cylinder Head Gasket Set – Fits Johnson/Evinrude 18-35 HP (Replaces 765012, 327674)

This cylinder head gasket set is engineered to fit Johnson/Evinrude 18–35 HP, 2-stroke outboard motors manufactured between 1979 and 2005. It is specifically designed for 2-cylinder engine configurations.

This kit serves as a direct replacement for Johnson/Evinrude OEM part numbers 765012, 324324, 327674, and 329419. It also replaces aftermarket parts from Sierra (18-3803, 18-3899), GLM (34570), and Mallory (9-63830).

• Installation Location: Engine head and water cover.
• Fuel Compatibility: Designed for gasoline engines.
• Material: Constructed from high-quality composite material for a durable seal.

Part Number Cross-Reference

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

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.

Technical Specifications

Package Contents

• 2 x Head Gasket (Replaces 324324, 329419)
• 2 x Water Cover Gasket (Replaces 327674, 33700)

Installation Guide

1. Safety First: Disconnect the battery and spark plug wires before beginning any work.
2. Drain Coolant: Drain the engine coolant completely.
3. Access Components: Remove the engine cover and any other parts obstructing access to the cylinder head.
4. Remove Head: Carefully unbolt and remove the cylinder head and water cover. Note the bolt pattern for reassembly.
5. Remove Old Gaskets: Take off the old head and water cover gaskets.
6. Clean Surfaces: Thoroughly clean all mating surfaces on the engine block and cylinder head, ensuring they are free of old gasket material and debris.
7. Position New Gaskets: Place the new gaskets into their correct positions, checking for proper alignment.
8. Reinstall Head: Reinstall the cylinder head and cover. Tighten the bolts to the manufacturer's specified torque and in the correct sequence.
9. Reconnect Components: Reattach all hoses, cables, and other components that were removed.
10. Refill Coolant: Refill the cooling system with the appropriate coolant.
11. Final Connections: Reconnect the spark plug wires and battery.
12. Test: Start the engine and carefully check for any leaks around the head and cover.

Troubleshooting & FAQ

Q: How do I confirm this gasket set fits my engine?
A: This set is designed for Johnson/Evinrude 18-35 HP, 2-stroke, 2-cylinder outboards from 1979–2005. Please cross-reference your engine's model and year with the "Compatible Engine Models" table and verify your original part number against our "Part Number Cross-Reference" list.

Q: What are the signs that my head gasket is failing and needs replacement?
A: Common signs of a failed head gasket include engine overheating, loss of power, white smoke from the exhaust, or water/coolant mixed in the engine oil. A visual inspection may also reveal leaks around the cylinder head.

Q: Does this set include both the head gasket and the water cover gasket?
A: Yes, this kit includes two head gaskets and two water cover gaskets, providing the necessary components for servicing the cylinder head on 2-cylinder models.

Q: OEM vs. Aftermarket?
A: 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.

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

Q: What is your warranty and return policy?
A: 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.