Gasket – Fits OMC, Johnson, Evinrude (Replaces BRP 325040, 0325040)
Gasket – Fits OMC, Johnson, Evinrude (Replaces BRP 325040, 0325040) 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).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Gasket – Fits OMC, Johnson, Evinrude (Replaces BRP 325040, 0325040)
Product Details
This Gasket – Fits OMC, Johnson, Evinrude (Replaces BRP 325040, 0325040) is an impeller housing gasket designed for a variety of OMC, Johnson, and Evinrude outboard motors. It is commonly used on smaller engines, including 4 HP, 5 HP, 6 HP, and 8 HP models.
It serves as a direct replacement for BRP part numbers 325040, 0325040, and 778154, as well as aftermarket equivalents including Sierra Marine 18-99156, SEI Marine 95-360-11, and GLM 36810.
- Installs on the impeller housing to create a proper seal.
- Backed by a 90-Day Warranty provided by the seller, Max Marine Outlet.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| BRP | 325040 |
| BRP | 0325040 |
| BRP | 778154 |
| Sierra Marine | 18-99156 |
| SEI Marine | 95-360-11 |
| GLM | 36810 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This part is widely used across various smaller OMC, Johnson, and Evinrude outboards.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| OMC/Johnson/Evinrude | Various | 4 HP | 325040 / 0325040 | Impeller Housing Gasket | ||
| OMC/Johnson/Evinrude | Various | 5 HP | 325040 / 0325040 | Impeller Housing Gasket | ||
| OMC/Johnson/Evinrude | Various | 6 HP | 325040 / 0325040 | Impeller Housing Gasket; Also fits 8HP. | ||
| OMC/Johnson/Evinrude | Various | 8 HP | 325040 / 0325040 | Impeller Housing Gasket; Also fits 4HP, 5HP & 6HP. |
Technical Specs
- Product Type
- Impeller Housing Gasket
- Installation Location
- Impeller Housing
- Dimensions
- 13.0" x 9.0" x 0.3"
- Weight
- 3.2 ounces (0.09 kg)
- Warranty
- 90-Day Warranty (from Max Marine Outlet)
What’s in the Box
- 4 x Gasket, Impeller Housing (Replaces 325040 / 0325040)
Installation Notes
- Disconnect the battery and shift the engine into neutral.
- Remove the lower unit (gearcase) from the outboard.
- Unbolt and carefully remove the water pump housing.
- Remove the old gasket and thoroughly clean both mating surfaces, ensuring they are free of old material and corrosion.
- Place the new gasket onto the impeller wear plate.
- Reinstall the water pump housing and torque the bolts to the manufacturer's specifications.
- Reinstall the lower unit onto the outboard.
- Reconnect the battery and test the engine in water, confirming a steady stream from the tell-tale outlet.
Troubleshooting & FAQ
How do I know if this gasket will fit my engine?
This gasket is designed for smaller OMC, Johnson, and Evinrude outboards, primarily in the 4 HP to 8 HP range. The most reliable method is to cross-reference your existing part number with those listed in our Part Number Matrix. Always compare the photos to your old part before purchasing.
What are the signs of a failing impeller housing gasket?
Common symptoms include the an engine overheating at idle or low speeds, a weak or inconsistent water stream from the engine's tell-tale outlet, or visible water leaks from the seams of the water pump housing.
How often should this gasket be replaced?
It is standard practice to replace the impeller housing gasket every time you service the water pump impeller. This is typically recommended every 1-2 years or every 100-200 hours of operation, whichever comes first.
Do I need to use gasket sealant during installation?
Generally, this gasket should be installed dry. Applying sealant can be risky, as excess material could squeeze out and block critical water passages. Only use sealant if it is explicitly recommended by your engine's official 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.
Payment & Security
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