Impeller Housing Gasket – Fits Johnson/Evinrude 40-75 HP (Replaces 319586)
Impeller Housing Gasket – Fits Johnson/Evinrude 40-75 HP (Replaces 319586) is backordered and will ship as soon as it is back in stock.
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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.).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Impeller Housing Gasket – Fits Johnson/Evinrude 40-75 HP (Replaces ...
Product Details
This high-quality Impeller Housing Gasket provides a reliable seal for the water pump assembly on Johnson/Evinrude 40-75 HP 2-Stroke outboard engines manufactured between 1975 and 1978. It prevents leaks and ensures proper cooling system performance.
This part directly replaces Johnson/Evinrude OEM part numbers 0319586 and 319586, and is interchangeable with Sierra 18-0969-9/18-0969, GLM 34330, Mallory Marine 9-60402, and SEI Marine 95-366-02.
- Made from durable paper/fiber composite to meet or exceed OEM specifications.
- Ensures a precise fit to prevent coolant and water leaks from the water pump housing.
- Essential for routine water pump service, maintenance, and rebuilds.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Johnson/Evinrude | 0319586 / 319586 |
| Sierra | 18-0969-9 / 18-0969 |
| GLM | 34330 |
| Mallory Marine | 9-60402 |
| SEI Marine | 95-366-02 |
Engine & Model Compatibility
Confirm your engine model and year in the table below to ensure accurate fitment.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Johnson/Evinrude | OMC | 40-75 | 2-Stroke | 1975–1978 | 319586/0319586 | Impeller Housing Gasket |
Technical Specs
- Product Type
- Impeller Housing Gasket
- Material
- Paper/Fiber
- Dimensions
- 6 × 7.5 × 1.13 in
- Weight
- 0.2 lbs (0.09 kg)
- OEM Reference
- Johnson/Evinrude 319586 / 0319586
- Package Quantity
- 1 (Note: Some brands like Sierra may offer multi-packs)
- Color
- Brown/Tan
- Warranty
- Manufacturer standard warranty
What’s in the Box
- 1 x Impeller Housing Gasket (Replaces 319586/0319586)
Installation Notes
- Disconnect the battery cables and ensure the engine is cool to the touch.
- Place a drain pan under the lower unit and drain the gearcase lubricant.
- Remove the bolts securing the lower unit (gearcase) and carefully lower it from the engine.
- Unbolt and remove the water pump housing to expose the impeller and old gasket.
- Carefully remove the old gasket. Use a plastic scraper to avoid damaging the metal mating surfaces.
- Thoroughly clean both the gearcase and water pump housing surfaces, removing all old gasket material and any corrosion.
- Position the new gasket onto the clean surface of the gearcase, ensuring it is properly aligned.
- Reinstall the water pump components (impeller, key, housing) in the reverse order of removal.
- Torque all bolts to the manufacturer's recommended specifications.
- Reattach the lower unit to the engine and refill the gearcase with fresh, appropriate lubricant.
- Reconnect the battery, start the engine using a water supply, and check for proper cooling and no leaks.
Troubleshooting & FAQ
How do I confirm this gasket fits my specific engine model?
This gasket is designed for Johnson/Evinrude 40-75 HP 2-Stroke engines from 1975–1978. Always cross-reference your engine's model number and the OEM part number (319586 or 0319586) with the compatibility chart. When in doubt, compare your old part to our product images and specifications.
What are the signs of a failing impeller housing gasket?
Common signs include water leaking from the gearcase housing, an overheating engine at idle or low speeds, or a weak water stream from the "telltale" outlet. Discoloration, brittleness, or cracking on the old gasket during an inspection also indicates it needs immediate replacement.
Can I reuse my old gasket or this new one in the future?
No. Gaskets are single-use components designed to crush and seal under pressure. Once compressed and heat-cycled, they lose their sealing ability. Always use a new gasket whenever servicing the water pump to prevent leaks.
Do I need to use a sealant or adhesive with this gasket?
Generally, paper/fiber gaskets like this are designed to be installed dry. Applying sealant can sometimes cause the gasket to slip, tear, or create an uneven seal. Follow your engine's service manual for specific recommendations, but a clean, dry installation is standard practice.
How often should the impeller and its gaskets be replaced?
As a general rule, the entire water pump assembly, including the impeller and all gaskets, should be inspected annually and replaced every 1-2 years or 100-200 hours of use, whichever comes first. This interval may need to be shorter in saltwater or high-debris environments.
Is this an OEM part or an aftermarket replacement?
This listing is for a high-quality aftermarket replacement part, not an OEM component. It is engineered to meet or exceed OEM-level specifications using comparable materials and is manufactured in an ISO 9002 certified facility, with batch inspections for quality and consistency.
What are your shipping speeds and costs?
We ship worldwide, with typical transit times of 5–15 days for most regions. Standard shipping is free for most orders, and expedited options may be available at checkout depending on your location.
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 for items that are unused and in their original condition. See our full policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part before purchase. If anything differs—even if your model appears compatible—do not install.
- This is an aftermarket replacement part, not an original equipment manufacturer (OEM) component.
- Professional installation is highly recommended for safety, proper function, 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 worldwide, typically within 5–15 days.
- Manufacturer-Direct Value — Our model provides fair, direct pricing without compromising on materials or quality control.
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