Water Pump Housing – Fits Yamaha 2-Stroke 25-50 HP (Replaces 679-44341-00-00)
Water Pump Housing – Fits Yamaha 2-Stroke 25-50 HP (Replaces 679-44341-00-00) 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 aftermarket Water Pump Housing – Fits Yamaha 2-Stroke 25-50 HP is designed for a precise fit on Yamaha 2-Stroke 25-50 HP engines manufactured between 1990 and 1999, as well as Parsun/Makara T36 2-stroke outboard models. It serves as a direct replacement component to restore the integrity of your engine's cooling system.
It directly replaces Yamaha part numbers 679-44341-00-00 and 679-44341-00-94, Mariner 46-83864M and 46-8M0070508, and Parsun T36-03000101, ensuring broad compatibility for maintenance and repairs.
- Installs as a direct OEM-equivalent replacement.
- Mounts to the lower unit as part of the water pump assembly.
- Engineered for use with compatible water pump impeller kits.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 679-44341-00-00 |
| Yamaha | 679-44341-00-94 |
| Mariner | 46-83864M |
| Mariner | 46-8M0070508 |
| Parsun | T36-03000101 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yamaha engines, this housing primarily fits C40, CV40, and other 25-50HP 2-stroke models from 1990–1999.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | C40ELRD | 40 | 2-Stroke | 1990 | 679-44341-00-00/94 | CV40ELD LOWER DRIVE 1 |
| Yamaha | CV40ELD | 40 | 2-Stroke | 1990 | 679-44341-00-00/94 | LOWER-DRIVE 1 |
| Yamaha | C40ELRP | 40 | 2-Stroke | 1991 | 679-44341-00-00/94 | LOWER DRIVE 1 |
| Yamaha | C40ELRQ | 40 | 2-Stroke | 1992 | 679-44341-00-00/94 | LOWER DRIVE 1 |
| Yamaha | C40MSHQ | 40 | 2-Stroke | 1992 | 679-44341-00-00/94 | LOWER DRIVE 1 |
| Yamaha | C40PLRQ | 40 | 2-Stroke | 1992 | 679-44341-00-00/94 | LOWER DRIVE 1 |
| Yamaha | C40ELRR | 40 | 2-Stroke | 1993 | 679-44341-00-00/94 | LOWER DRIVE 1 |
| Yamaha | C40MSHR | 40 | 2-Stroke | 1993 | 679-44341-00-00/94 | LOWER DRIVE 1 |
| Yamaha | C40PLRR | 40 | 2-Stroke | 1993 | 679-44341-00-00/94 | LOWER DRIVE 1 |
| Yamaha | C40ELRS | 40 | 2-Stroke | 1994 | 679-44341-00-00/94 | LOWER CASING DRIVE 1 |
| Yamaha | C40ERS | 40 | 2-Stroke | 1994 | 679-44341-00-00/94 | LOWER CASING - DRIVE 1 |
| Yamaha | C40MHS | 40 | 2-Stroke | 1994 | 679-44341-00-00/94 | LOWER CASING - DRIVE 1 |
| Yamaha | C40MLHS | 40 | 2-Stroke | 1994 | 679-44341-00-00/94 | LOWER CASING DRIVE 1 |
| Yamaha | C40MSHS | 40 | 2-Stroke | 1994 | 679-44341-00-00/94 | LOWER CASING DRIVE 1 |
| Yamaha | C40PLRS | 40 | 2-Stroke | 1994 | 679-44341-00-00/94 | LOWER CASING DRIVE 1 |
| Yamaha | C40PRS | 40 | 2-Stroke | 1994 | 679-44341-00-00/94 | LOWER CASING - DRIVE 1 |
| Yamaha | C40ELRT | 40 | 2-Stroke | 1995 | 679-44341-00-00/94 | LOWER CASING DRIVE 1 |
| Yamaha | C40ERT | 40 | 2-Stroke | 1995 | 679-44341-00-00/94 | LOWER CASING - DRIVE 1 |
| Yamaha | C40MHT | 40 | 2-Stroke | 1995 | 679-44341-00-00/94 | LOWER CASING - DRIVE 1 |
| Yamaha | C40MLHT | 40 | 2-Stroke | 1995 | 679-44341-00-00/94 | LOWER CASING DRIVE 1 |
| Yamaha | C40MSHT | 40 | 2-Stroke | 1995 | 679-44341-00-00/94 | LOWER CASING DRIVE 1 |
| Yamaha | C40PLRT | 40 | 2-Stroke | 1995 | 679-44341-00-00/94 | LOWER CASING DRIVE 1 |
| Yamaha | C40PRT | 40 | 2-Stroke | 1995 | 679-44341-00-00/94 | LOWER CASING - DRIVE 1 |
| Yamaha | C40ELRU | 40 | 2-Stroke | 1996 | 679-44341-00-00/94 | LOWER CASING DRIVE 1 |
| Yamaha | C40MSHU | 40 | 2-Stroke | 1996 | 679-44341-00-00/94 | LOWER CASING DRIVE 1 |
| Yamaha | C40PLRU | 40 | 2-Stroke | 1996 | 679-44341-00-00/94 | LOWER CASING DRIVE 1 |
| Yamaha | C40ELRV | 40 | 2-Stroke | 1997 | 679-44341-00-00/94 | LOWER CASING DRIVE 1 |
| Yamaha | C40ESHV | 40 | 2-Stroke | 1997 | 679-44341-00-00/94 | LOWER CASING DRIVE 1 |
| Yamaha | C40MSHV | 40 | 2-Stroke | 1997 | 679-44341-00-00/94 | LOWER CASING DRIVE 1 |
| Yamaha | C40PLRV | 40 | 2-Stroke | 1997 | 679-44341-00-00/94 | LOWER CASING DRIVE 1 |
| Yamaha | Various 25-50HP | 25-50 | 2-Stroke | 1990–1999 | 679-44341-00-00/94 | C40 and CV40 series |
For Parsun/Makara models, compatibility is confirmed for T36 models, which are based on the Yamaha C40 design.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Parsun | T36 | 36-40 | 2-Stroke | T36-03000101 | Compatible with Yamaha C40 clones |
Technical Specs
- Product Type
- Water Pump Housing
- Installation
- Direct OEM replacement
- Dimensions
- 10.0" L x 3.0" W x 8.0" H
- Fitting Type
- Lower unit mounting
- Other Technical Attributes
- For use with compatible water pump impeller kits
What’s in the Box
- 1 x Housing, Water Pump (Replaces 679-44341-00-00 / 679-44341-00-94)
Installation Notes
- Disconnect the battery and ensure the engine is securely mounted.
- Drain the gearcase lubricant from the lower unit.
- Remove the bolts securing the lower unit to the upper casing.
- Carefully separate the lower unit from the engine's upper section.
- Unbolt and remove the existing water pump housing.
- Clean the mounting surface and inspect the impeller, gaskets, and keyway for wear, replacing as necessary.
- Install the new water pump housing, ensuring a correct fit.
- Torque the housing bolts to the manufacturer's specified values.
- Reassemble the lower unit to the engine, ensuring the driveshaft and water tube align correctly.
- Refill the gearcase with fresh lubricant and reconnect the battery.
- Test the engine in water to verify proper cooling system operation.
Troubleshooting & FAQ
How do I confirm this housing fits my specific engine?
The best method is to match your engine's model and year against the compatibility table. Additionally, cross-reference the OEM part number stamped on your old housing with the numbers listed in our Part Number Matrix.
What are the signs of a failing water pump housing?
Common symptoms include engine overheating, a weak or non-existent water stream from the "tell-tale" outlet, and visible cracks, warping, or corrosion on the housing itself. A melted or distorted housing is a clear sign of severe overheating and immediate failure.
Can I reuse my old impeller with this new housing?
It is strongly recommended to install a new impeller and associated gaskets whenever you replace the water pump housing. An old, worn, or brittle impeller can fail and cause the new housing to overheat and warp.
How often should the water pump housing be inspected or replaced?
The entire water pump assembly, including the housing and impeller, should be inspected annually or every 100 hours of use. Replace the housing if you see any signs of wear, warping, or cracking. Many technicians replace the housing preventatively with every other impeller change.
Do I need any special tools for installation?
Standard marine mechanic tools, including a socket set, torque wrench, and screwdrivers, are required. A gear lube pump may also be needed to refill the lower unit. No highly specialized tools are typically necessary for this job.
Is this part different from the original OEM version?
This is an aftermarket part designed to meet or exceed OEM specifications for fit, form, and function. It may have minor cosmetic differences but is built with comparable materials to ensure reliable performance in the marine environment.
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.
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