Powerhead Gasket Set – Fits Johnson/Evinrude 18-35 HP 2-Stroke Outboards (Replaces 0392567, 389206, 392615, 433941)
Powerhead Gasket Set – Fits Johnson/Evinrude 18-35 HP 2-Stroke Outboards (Replaces 0392567, 389206, 392615, 433941) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Powerhead Gasket Set – Fits Johnson/Evinrude 18-35 HP 2-Stroke Outb...
Product Details
This complete Powerhead Gasket Set is engineered for Johnson/Evinrude 18-35 HP 2-stroke outboard engines manufactured between 1979 and 2005, including JET models from 1995–1998. It contains all necessary gaskets for servicing the cylinder head, powerhead base, and related components, ensuring a comprehensive seal for your engine.
This kit serves as a direct replacement for OEM part numbers 0392567, 389206, 392615, and 433941, and interchanges with Sierra 18-4307, GLM 39420, and Mallory Marine 9-64114.
- Installation is engine-specific and requires appropriate tools.
- Designed for use with gasoline-fueled 2-stroke marine engines.
- Includes a full set of gaskets for a complete powerhead overhaul.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Johnson/Evinrude (OEM) | 0392567, 389206, 392615, 433941 |
| Sierra | 18-4307 |
| GLM | 39420 |
| Mallory Marine | 9-64114 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This set is designed for a wide range of Johnson and Evinrude 2-stroke outboards.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Johnson/Evinrude | 18 HP JET | 18 | 2-Stroke | 1995–1998 | 0392567/389206/392615/433941 | |
| Johnson/Evinrude | 20 HP | 20 | 2-Stroke | 1985–1999 | 0392567/389206/392615/433941 | |
| Johnson/Evinrude | 25 HP | 25 | 2-Stroke | 1979–2005 | 0392567/389206/392615/433941 | |
| Johnson/Evinrude | 28 HP | 28 | 2-Stroke | 1986–1996 | 0392567/389206/392615/433941 | |
| Johnson/Evinrude | 30 HP | 30 | 2-Stroke | 1984–2003 | 0392567/389206/392615/433941 | |
| Johnson/Evinrude | 35 HP | 35 | 2-Stroke | 1979–1988 | 0392567/389206/392615/433941 | Crossflow Models |
| Johnson/Evinrude | E35ECND | 35 | 2-Stroke | 1982 | 0392567/389206/392615/433941 | CYLINDER & CRANKCASE |
| Johnson/Evinrude | E35ELCND | 35 | 2-Stroke | 1982 | 0392567/389206/392615/433941 | CYLINDER & CRANKCASE |
| Johnson/Evinrude | E35RCND | 35 | 2-Stroke | 1982 | 0392567/389206/392615/433941 | CYLINDER & CRANKCASE |
| Johnson/Evinrude | E35RLCND | 35 | 2-Stroke | 1982 | 0392567/389206/392615/433941 | CYLINDER & CRANKCASE |
| Johnson/Evinrude | E35TELCNB | 35 | 2-Stroke | 1982 | 0392567/389206/392615/433941 | CYLINDER & CRANKCASE |
| Johnson/Evinrude | Various 25-35 HP models | 25-35 | 2-Stroke | 1983–1988 | 0392567/389206/392615/433941 | Including E35ECTS, E35ELCTS, E35RCTS, E35RLCTS, E35TELCTS, E30ECRR, E30ELCRR, E35ECRR, E35ELCRR, E35RCRR, E35RLCRR, E35TELCRR |
Technical Specs
- Product Type
- Powerhead Gasket Set
- Installation
- Engine-specific
- Fuel Type
- Gasoline
- Other Technical Attributes
- Complete gasket set for cylinder head, powerhead base, and related engine components
What’s in the Box
- 1 x Exhaust Manifold Gasket (Replaces Sierra 18-0106)
- 1 x Carburetor Gasket (Replaces Sierra 18-0118)
- 1 x Inner Exhaust Cover Gasket (Replaces Sierra 18-0126)
- 1 x Fuel Pump Gasket (Replaces Sierra 18-0850)
- 1 x Bypass Gasket (Replaces Sierra 18-0971)
- 1 x Leafplate Gasket (Replaces Sierra 18-0981)
- 1 x Powerhead Base Gasket (Replaces Sierra 18-2852)
- 1 x Leaf Plate Gasket (Replaces Sierra 18-2862)
- 1 x Head Gasket (Replaces Sierra 18-3803)
- 1 x Water Cover Gasket (Replaces Sierra 18-3899)
Installation Notes
- Disconnect the battery and fuel lines for safety. Ensure the engine is cool.
- Carefully disassemble the engine components required to access the powerhead assembly. Keep track of all hardware.
- Thoroughly clean all mating surfaces, removing any old gasket material, sealant, and debris. A clean, smooth surface is critical for a proper seal.
- Match each old gasket with a new one from the kit to ensure correct placement. Do not force any gasket into place.
- Install the new gaskets. Unless specified by your service manual, gaskets should be installed dry without any additional sealant.
- Reassemble all components, torquing bolts to the manufacturer's specified values and sequence.
- Reconnect fuel lines and the battery. Check for leaks before starting the engine.
Troubleshooting & FAQ
How do I know if this gasket set fits my engine?
This set is for Johnson/Evinrude 18-35 HP 2-stroke outboards (1979–2005). The best way to confirm fitment is to check your engine's model and year against the compatibility table on this page. You can also cross-reference your existing part number with the OEM and aftermarket numbers listed in our Part Number Matrix.
What are the signs of a failed powerhead gasket?
Common symptoms include loss of compression, water in cylinders, milky or discolored oil, engine overheating, or visible water/oil leaks around the engine block. If you notice any of these signs, a thorough inspection is recommended.
Do I need sealant with these gaskets?
In most cases, these gaskets are designed to be installed dry. Applying sealant can sometimes interfere with the seal. Always follow the specific recommendations in your engine's official service manual.
Is this a complete kit for a powerhead rebuild?
This kit includes all the necessary gaskets for resealing the powerhead assembly. However, a full rebuild may require other components like pistons, rings, bearings, or seals which are not included in this gasket set.
What is the difference between OEM and this aftermarket set?
This is an aftermarket replacement part, not an OEM product. It's engineered to meet or exceed original equipment specifications for fit, form, and function, providing a reliable and cost-effective alternative. Our parts are made in an ISO 9002 facility and undergo batch inspections.
How fast do you ship and what are the costs?
We ship worldwide, with typical transit times of 5–15 days. Standard shipping is free for most orders. If available for your location, expedited shipping options and their costs will be displayed at checkout.
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 of unused items in their original condition are accepted within our standard return window. Refer to our policy page for full details.
Safety & Important Info
- Verify images and specifications against your original part before ordering. If anything differs—even if your model is listed as compatible—do not purchase.
- This is an aftermarket replacement part, not an OEM component.
- Professional installation is highly recommended for safety, performance, and to prevent engine damage.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world conditions.
- Fast Global Fulfillment — We offer free standard delivery to most regions, with parts arriving in 5–15 days.
- Manufacturer-Direct Value — By working directly with manufacturers, we provide fair pricing without compromising on materials or quality control.
Payment & Security
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