Water Pump Impeller – Fits Yamaha 8/9.9/15 HP (Replaces 682-44352-03-00)
This replacement water pump impeller fits a range of Yamaha outboard engines, including 2-stroke and 4-stroke models in 8, 9.9, and 15 HP configurations. As a key component of the water pump, it ensures proper circulation of cooling water throughout the engine to prevent overheating.
This component is a direct replacement for Yamaha part numbers 682-44352-03-00, 682-44352-00, and 682-44352-01, as well as Quicksilver 8M6010335 and Sierra 18-8921.
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Installation Location: Mounts inside the water pump housing in the lower unit/gear case.
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Durable Material: Constructed from high-quality neoprene rubber for reliable performance.
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Proactive Maintenance: Recommended replacement interval is every 100 operating hours or annually, whichever comes first.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
Brand |
Part Number |
Yamaha |
682-44352-03-00 |
Yamaha |
682-44352-00 |
Yamaha |
682-44352-01 |
Quicksilver |
8M6010335 |
Sierra |
18-8921 |
Compatible Engine Models
Confirm your engine model/year in the table below. For Yamaha owners, here’s a guide to help you identify your engine’s serial/model: Yamaha Serial Number Guide. You can also review exploded diagrams to verify part numbers: Yamaha Parts Diagrams & Catalog.
Brand |
Model |
Rated HP |
Stroke |
Years |
OEM Part No. |
Notes |
Yamaha |
9.9D |
9.9 |
2-Stroke |
- |
682-44352-00/03 |
Type C/D models |
Yamaha |
15D |
15 |
2-Stroke |
- |
682-44352-00/03 |
Type C/D models |
Yamaha |
F8 |
8 |
4-Stroke |
- |
682-44352-00/03 |
|
Yamaha |
F9.9 |
9.9 |
4-Stroke |
Up to 2000 |
682-44352-00/03 |
|
Yamaha |
F15 |
15 |
4-Stroke |
- |
682-44352-00/03 |
|
Technical Specifications
Specification |
Value |
Product Type |
Water Pump Impeller |
Installation Location |
Lower Unit / Gear Case |
Material |
Neoprene Rubber |
Number of Blades |
6 |
Dimensions |
40.89 mm OD × 17.76 mm H × 11.58 mm ID (1.61" × 0.70" × 0.46") |
Weight |
12 g (0.4 oz) |
Color |
Black |
Recommended Replacement |
Every 100 hours or annually |
Operating Temperature |
-29°C to 120°C (-20°F to 250°F) |
Package Contents
- 1 x Impeller (Replaces 682-44352-03-00)
Explosion Diagram
Installation Guide
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Disconnect Power: Disconnect the spark plug leads and the negative battery terminal for safety.
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Access Lower Unit: Shift the outboard into neutral. Remove the bolts securing the lower unit (gear case) to the engine leg.
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Remove Water Pump Housing: Carefully detach the lower unit. Locate and unbolt the water pump housing cover.
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Replace Impeller: Note the rotational direction of the old impeller fins before removing it. Remove the old impeller and Woodruff key.
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Install New Impeller: Clean the housing interior of any debris or corrosion. Install the new Woodruff key and slide the new impeller onto the drive shaft, twisting it in the direction of engine rotation to bend the fins correctly.
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Reassemble: Reinstall the water pump housing, ensuring a proper seal. Apply marine-grade grease to splines and shift shafts before carefully reattaching the lower unit.
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Test Operation: Once fully assembled, start the engine in a test tank or with a water flusher to confirm that water is exiting the tell-tale port.
Troubleshooting & FAQ
How do I confirm this fits my engine?
First, check your existing part number against the cross-reference list provided above. Second, review the compatible engine models table to ensure your specific Yamaha model and horsepower are listed. Using our linked Yamaha guides can also help verify your engine details.
How often should I replace the impeller?
For optimal cooling performance and to prevent engine damage, we recommend replacing the impeller every 100 operating hours or annually, even if it appears undamaged.
What are the signs of a failing impeller?
Common signs include a weak or non-existent water stream from the "tell-tale" outlet, an engine temperature alarm, or the engine running hotter than usual. A brittle, cracked, or deformed impeller should be replaced immediately.
OEM vs. Aftermarket?
This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.
How fast do you ship and how much does it cost?
We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.
What is your warranty and return policy?
This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.
Important Notes
- Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
- This product is an aftermarket replacement part and is not an OEM component.
- Professional installation is recommended to ensure safety and optimal performance.
Why Choose JLM MARINE?
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Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
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Fast Global Shipping: Free delivery worldwide in 5–15 days.
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Direct from Manufacturer: Competitive pricing without compromising quality.