Water Pump Impeller – Fits Yamaha 9.9/15 HP 2-Stroke & F9.9/FT9.9/T9.9 4-Stroke (Replaces 682-44352-01-00)
Water Pump Impeller – Fits Yamaha 9.9/15 HP 2-Stroke & F9.9/FT9.9/T9.9 4-Stroke (Replaces 682-44352-01-00) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
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Water Pump Impeller – Fits Yamaha 9.9/15 HP 2-Stroke & F9.9/FT9...
Water Pump Impeller – Fits Yamaha 9.9/15 HP 2-Stroke & F9.9/FT9.9/T9.9 4-Stroke (Replaces 682-44352-01-00) is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket water pump impeller is designed for select Yamaha outboard motors. It restores water-pump circulation to help maintain proper engine cooling on compatible Yamaha 9.9 HP and 15 HP models, including specified 2-stroke and 4-stroke applications.
This listing is for one replacement impeller, not a complete water pump repair kit. The impeller is listed as a replacement for Yamaha OEM part number 682-44352-01-00 and corresponds to Sierra part number 18-3074.
- Direct replacement design for the listed applications.
- Made from neoprene rubber for dependable service in marine cooling systems.
- Six-blade design supports efficient water circulation.
Part Number Matrix
Use the following references to compare the impeller with your original part before ordering.
| Brand | Part Number | Reference Type |
|---|---|---|
| Yamaha | 682-44352-01-00 | OEM replacement reference |
| Sierra | 18-3074 | Aftermarket cross-reference |
Engine & Model Compatibility
Confirm the exact model, horsepower, stroke type, and year range before ordering. The verified application information below is based on the listed replacement reference.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Yamaha | 9.9 | 9.9 | 2-Stroke | 1984–1995 | 682-44352-01-00 |
| Yamaha | 15 | 15 | 2-Stroke | 1984–1995 | 682-44352-01-00 |
| Yamaha | F9.9 | 9.9 | 4-Stroke | 1985–1996 | 682-44352-01-00 |
| Yamaha | FT9.9 | 9.9 | 4-Stroke | 1985–1990 | 682-44352-01-00 |
| Yamaha | T9.9 | 9.9 | 4-Stroke | 1991–1996 | 682-44352-01-00 |
Model designations and application details can vary by market and serial number. If your engine falls outside the ranges shown above, verify the OEM part number against the engine’s parts diagram before purchase.
Technical Specs
- Product Type
- Water Pump Impeller
- Installation
- Direct replacement
- Dimensions
- A: 13 mm (0.51 in)
B: 40 mm (1.57 in)
C: 22 mm (0.87 in) - Material
- Neoprene rubber
- Number of Blades
- 6
- Replacement Reference
- Yamaha 682-44352-01-00
What’s in the Box
- 1 x Water pump impeller
The package does not include a gasket, key, housing, wear plate, cup, seal, bolts, or other water-pump repair-kit components.
Installation Notes
- Disconnect all power sources and make sure the engine is off and cool.
- Secure the outboard motor on a suitable stand or transom.
- Drain the gearcase oil into an appropriate container if required by the service procedure.
- Remove the fasteners securing the lower unit to the midsection.
- Carefully lower and separate the gearcase to access the water pump.
- Remove the water-pump housing cover.
- Note the old impeller blade orientation before removing it.
- Clean debris from the housing and inspect the housing, wear plate, cup, seal, key, and gasket for wear or damage. Replace damaged components as needed.
- Lightly lubricate the new impeller with a lubricant approved for the application.
- Install the impeller with the blades oriented correctly, turning the driveshaft in the manufacturer-specified direction to seat the blades.
- Reassemble the pump housing and lower unit, then refill the gearcase with the correct lubricant.
- Test the engine in water and confirm a steady tell-tale stream before normal operation.
Troubleshooting & FAQ
How do I know if this impeller fits my specific engine?
Check your engine’s brand, model, horsepower, stroke type, year, and OEM part number against the compatibility table. Because fitment can depend on model and serial-number details, compare the original impeller and consult the engine parts diagram when necessary.
What are the signs of a failing water pump impeller?
Common signs include a weak, intermittent, or absent tell-tale stream, an overheating alarm, or reduced cooling performance. Stop operation if the engine overheats and inspect the cooling system.
How often should I replace the impeller?
Inspect the impeller regularly and replace it according to the engine manufacturer’s maintenance schedule. Service intervals can be shorter in saltwater, sandy, silty, or heavily used applications.
Can I install this myself?
Many experienced boat owners can replace an impeller, but the job requires lower-unit disassembly and correct reassembly. If you are not familiar with outboard service procedures, use a qualified marine mechanic.
Is this an OEM part?
This listing is for an aftermarket replacement impeller, not a Yamaha-branded OEM component. Yamaha and Sierra numbers are provided only as replacement and cross-reference identifiers.
Does this include a complete water pump kit?
No. This package contains one impeller only. Gaskets, keys, seals, plates, cups, housings, bolts, and other repair-kit components are not included.
Shipping speed & cost
We ship worldwide quickly—typical transit is 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 an issue arises, contact support with your order details. Returns are accepted within our standard window when the item is unused and in its original condition. See the applicable policy page or contact support for instructions.
Safety & Important Info
- Verify the model, year, horsepower, stroke type, serial-number range, and OEM part number before ordering.
- Compare the replacement impeller with the original part before installation.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended when lower-unit service experience is limited.
- Do not operate an outboard with an overheating engine or without confirming proper cooling-water flow.
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 quality control.
Payment & Security
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