Water Pump Impeller – Fits Yamaha 25-30HP Outboard Motors (Replaces 689-44352-02-00)
Water Pump Impeller – Fits Yamaha 25-30HP Outboard Motors (Replaces 689-44352-02-00) 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
Water Pump Impeller – Fits Yamaha 25-30HP Outboard Motors (Replaces...
Product Details
This Water Pump Impeller is designed for a range of Yamaha 25-30HP 2-stroke outboard motors from 1984–1997 (including C25, C30, CV25, and CV30 series) and various Mercury/Mariner 20-30HP 2-stroke outboards such as the 20C, 25C, 30A, and W30 models.
It serves as a direct replacement for Yamaha part numbers 689-44352-02-00, 689-44352-01-00, and 689-44352-00-00; Mercury/Mariner 47-84797M and 47-81604M; and Sierra 18-3069 and 18-3067.
- Installs inside the outboard's lower unit water pump assembly.
- Features a plastic hub with 6 blades for efficient water circulation.
- Engineered for a direct-fit replacement of the original part.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 689-44352-02-00 |
| Yamaha | 689-44352-01-00 |
| Yamaha | 689-44352-00-00 |
| Mercury / Mariner | 47-84797M |
| Mercury / Mariner | 47-81604M |
| Sierra | 18-3069 |
| Sierra | 18-3067 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Fits various Yamaha 2-stroke outboards from 25HP to 30HP manufactured between 1984 and 1997.
Compatible with select Mercury and Mariner 2-stroke models, including 20C, 25C, 28HP, 30A, and W30 Marathon. Please verify your specific model code.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 25HP | 25 | 2-Stroke | 1984–1987 | 689-44352-02-00 | |
| Yamaha | 30HP | 30 | 2-Stroke | 1984–1987 | 689-44352-02-00 | |
| Yamaha | CV25 | 25 | 2-Stroke | 1989–1990 | 689-44352-02-00 | |
| Yamaha | CV30 | 30 | 2-Stroke | 1989–1990 | 689-44352-02-00 | |
| Yamaha | C25 | 25 | 2-Stroke | 1991–1997 | 689-44352-02-00 | |
| Yamaha | C30 | 30 | 2-Stroke | 1991–1997 | 689-44352-02-00 | |
| Mercury/Mariner | 20C (Mode Code 6A9) | 20 | 2-Stroke | 47-84797M | ||
| Mercury/Mariner | 25C (through propeller exhaust) | 25 | 2-Stroke | 47-84797M | ||
| Mercury/Mariner | 28HP (Mode Code 664) | 28 | 2-Stroke | 47-84797M | ||
| Mercury/Mariner | 30A | 30 | 2-Stroke | 47-84797M | ||
| Mercury/Mariner | W30 (W-MARATHON) | 30 | 2-Stroke | 47-84797M |
Technical Specs
- Product Type
- Water Pump Impeller
- Installation
- Outboard Lower Unit Water Pump
- Connection
- Direct Drive Shaft
- Housing Material
- Plastic Hub
- Housing Color
- Black
- Dimensions
- External Diameter: 68.52mm, Height: 13.02mm, Internal Shaft Insert Diameter: 16.03mm
- Weight
- 19g (0.042 lbs)
- Fitting Type
- Direct Fit
- Blades
- 6
What’s in the Box
- 1 x Water Pump Impeller (689-44352-02-00)
Installation Notes
- Disconnect the engine's battery and remove the safety lanyard.
- Place the outboard in neutral and drain the lower unit gear lube into a suitable container.
- Remove the bolts securing the lower unit (gearcase) to the engine's midsection and carefully lower it.
- Locate and unbolt the water pump housing cover.
- Slide the old impeller off the driveshaft, noting the direction its blades are curved.
- Clean the interior of the pump housing and inspect the housing, wear plate, and seals for damage, replacing if necessary.
- Lightly grease the new impeller and slide it onto the driveshaft while turning the shaft clockwise to bed the blades correctly.
- Reinstall the water pump housing and torque its bolts to the manufacturer's specification.
- Reinstall the lower unit, ensuring the water tube and shift shaft are correctly aligned, and refill with fresh gear lube.
- Reconnect the battery and test the engine in a water source to confirm a strong tell-tale stream.
Troubleshooting & FAQ
How do I confirm this impeller fits my engine?
The best way is to check your engine's part manual for the required OEM part number. You can then compare it with the numbers listed in our Part Number Matrix. Also, review the Engine & Model Compatibility table to see if your specific model and year are listed.
What are common signs of a bad water pump impeller?
A weak or no water stream from the "tell-tale" outlet is the most common sign. Other symptoms include engine overheating alarms, a hot-to-the-touch engine casing, and in severe cases, steam from the exhaust.
How often should the impeller be replaced?
As a general rule, it's recommended to inspect the impeller annually and replace it every 1–2 years or every 100–200 hours of use, whichever comes first. This interval can be shorter if you operate in sandy, silty, or saltwater environments.
Can I install this part myself?
Yes, impeller replacement is a common maintenance task for many boat owners with basic mechanical skills and tools. However, it involves removing the lower unit, so it's important to follow a service manual for your specific engine model. If you are unsure, we recommend professional installation.
Are any special tools needed?
Standard mechanic's tools like a socket/wrench set are usually sufficient to remove the lower unit and water pump housing. Some engine models might require a flywheel puller or lifting hoist for removing a heavy lower unit. Always consult your service manual.
Is this an OEM part?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 facility, where it is batch-inspected for consistency.
What are the shipping speed and cost?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options will appear at checkout where available.
What is the warranty and return policy?
This part is covered by a 1-year warranty against manufacturing defects under normal use. If any issues arise, contact our support team with your order details. Returns are accepted within our standard window, provided the item is unused and in its 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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