Water Pump Housing – Fits Parsun and Yamaha Outboard Engines (PAF20-04040000, 6AH-44311-00)
Water Pump Housing – Fits Parsun and Yamaha Outboard Engines (PAF20-04040000, 6AH-44311-00) 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
Product Details
This Water Pump Housing is a direct replacement part designed for Parsun F-Series (15-25 HP, 4-Stroke) outboard engines and is also compatible with select Yamaha marine engines requiring part number 6AH-44311-00. It ensures optimal water flow and cooling efficiency for your outboard motor.
It serves as a direct interchange for Parsun part PAF20-04040000 and Yamaha part 6AH-44311-00.
- Engineered for direct, hassle-free installation.
- Designed to restore optimal cooling system performance.
- Includes one water pump housing as shown.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Parsun | PAF20-04040000 |
| Yamaha | 6AH-44311-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Parsun Engines: This housing fits F-Series 4-stroke models from 15 HP to 25 HP.
For Yamaha Engines: Compatibility is based on the part number. Please verify that your engine uses the 6AH-44311-00 housing.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Parsun | F-Series | 15-25 | 4-Stroke | PAF20-04040000 |
Technical Specs
- Product Type
- Water Pump Housing
- Installation
- Direct replacement
- Dimensions
- Height: 5.0 cm, Width: 8.0 cm, Length: 10.0 cm
- Weight
- 0.07 kg (0.15 lbs)
- Other Technical Attributes
- Designed for optimal water flow and cooling efficiency
What’s in the Box
- 1 x Water Pump Housing (Replaces PAF20-04040000 / 6AH-44311-00)
Installation Notes
- Disconnect the battery and ensure the engine is cool.
- Remove the lower unit from the outboard motor.
- Unbolt and remove the old water pump assembly.
- Carefully note the orientation of all components.
- Remove the old housing, impeller, and gaskets.
- Clean all mating surfaces thoroughly, removing any old gasket material.
- Install the new water pump housing with a new impeller and gaskets (not included unless specified).
- Ensure all components are correctly aligned and seated.
- Re-torque bolts to the manufacturer's specifications.
- Reinstall the lower unit.
- Reconnect the battery and test the engine in water, checking for proper water pump operation (telltale stream).
Troubleshooting & FAQ
How do I confirm this housing fits my engine?
Verify your engine model is listed in the compatibility chart. Critically, confirm your existing part number matches PAF20-04040000 or 6AH-44311-00.
Does this housing come with an impeller or gaskets?
This listing is for the water pump housing only. Impellers, gaskets, and other pump components are sold separately.
What are the signs of a failing water pump housing?
Common signs include engine overheating, a weak or non-existent water stream from the telltale outlet, visible cracks or warping on the old housing, or a melted housing from a previous overheating event.
How often should the water pump housing be inspected or replaced?
The housing should be inspected every time you replace the water pump impeller, typically every 100 hours or at least once a year. Replace it if you see any signs of wear, warping, or cracking.
Can I use this on my Yamaha if the title mentions Parsun?
Yes, if your Yamaha engine uses the OEM part number 6AH-44311-00. The housing is cross-compatible between these specific brands and models.
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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