Water Pump Seal and Washer Kit – Fits Mercury Marine 30-70 HP (Replaces 26-38452, 26-38453)
Water Pump Seal and Washer Kit – Fits Mercury Marine 30-70 HP (Replaces 26-38452, 26-38453) 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
Water Pump Seal and Washer Kit – Fits Mercury Marine 30-70 HP (Repl...
Product Details
This Water Pump Seal and Washer Kit – Fits Mercury Marine 30-70 HP Outboards (Replaces 26-38452, 26-38453) is designed for various 2-stroke outboards. It is specifically made for use inside the water pump impeller housing with part number 77177A3 or 46-77177A3.
This kit provides a direct replacement for Mercury part numbers 26-38452 (seal) and 26-38453 (washer kit), as well as aftermarket equivalents from UanofCn and YiheoZux.
- Installs directly with standard tools.
- Engineered for use within the 77177A3 water pump impeller kit housing.
- Kit includes both the seal and washer for a complete refresh.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury Marine | 26-38452 |
| Mercury Marine | 26-38453 |
| UanofCn | 26-38452/26-38453 kit |
| YiheoZux | 26-38452/26-38453 kit |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury Marine: Designed for a range of 30-70 HP 2-stroke outboards. Note that this kit is not compatible with Japanese-made Mariner models.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Mercury | 30 JET | 30 | 2-Stroke | 26-38452, 26-38453 | For use with housing 46-77177A3 |
| Mercury | Various | 35-70 | 2-Stroke | 26-38452, 26-38453 | For use with housing 46-77177A3 |
Technical Specs
- Product Type
- Water Pump Seal and Washer Kit
- Installation
- Direct replacement with standard tools
- Housing Material
- Rubber
- Housing Color
- Black
- Weight
- 9 g (0.317 oz)
- Other Technical Attributes
- For installation in 77177A3 water pump impeller kit housing
What’s in the Box
- 1 x Seal (Replaces 26-38452)
- 1 x Washer Kit (Replaces 26-38453)
- 1 x Installation Instructions
Installation Notes
- Disconnect the battery and ensure the engine is off and cool.
- Remove the lower unit (gearcase) from the outboard motor.
- Unbolt and remove the water pump housing to access the impeller and seals.
- Carefully remove the old impeller, washers, and seals, noting their orientation.
- Clean the interior surfaces of the pump housing, removing any debris or corrosion.
- Install the new seal and washer from this kit into the water pump housing (part no. 77177A3).
- Install the new impeller and reassemble the water pump assembly.
- Reinstall the lower unit onto the outboard and securely tighten all bolts to the manufacturer's torque specifications.
- Reconnect the battery and test the engine using a water source (flushing muffs or in water). Check for proper water flow from the tell-tale port.
Troubleshooting & FAQ
How do I know if this kit fits my specific outboard model?
This kit is designed for Mercury 30-70 HP 2-stroke outboards that use the 77177A3 (or 46-77177A3) water pump housing. Please verify your housing part number before ordering. It is confirmed not to fit Japanese-made Mariner motors.
What are the signs of a failing water pump seal?
Common signs include an overheating engine at idle or low speeds, a weak or non-existent water stream from the "tell-tale" outlet, or evidence of water leaking from the water pump housing area after the engine is turned off.
Is this kit all I need to service my water pump?
This kit contains only the seal and washer. A complete water pump service typically also requires a new impeller, gaskets, and sometimes a face plate, which are sold separately in a full water pump repair kit (like Mercury's 77177A3 kit).
Can I reuse my old water pump housing?
Yes, as long as the housing (part no. 77177A3) is not cracked, warped, or heavily scored on the inside surfaces. A damaged housing will cause premature failure of the new impeller and seals.
What is the difference between an OEM part and an aftermarket part?
This listing is an aftermarket replacement (not OEM). It is built to meet or exceed OEM-level specifications with comparable materials. Our parts are manufactured in an ISO 9002 certified facility and are batch-inspected to ensure quality and consistency.
What are your shipping speeds and costs?
We ship worldwide quickly, with typical transit times of 5–15 days for most regions. Standard shipping is free, and expedited options will appear at checkout if they are available for your location.
What is your warranty and returns policy?
Our products are covered by a 1-year warranty against any manufacturing defects under normal 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. Please see our full 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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