Water Pump Impeller – Fits Yamaha 8/9.9/15 HP (Replaces 682-44352-03-00)

Vendor: JLM Marine
Availability: In Stock
Product Type: Water Pump Impeller
$18.50
$18.50
Subtotal: $18.50

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Water Pump Impeller – Fits Yamaha 8/9.9/15 HP (Replaces 682 - 44352 - 03 - 00) - JLM Marine Boat Parts Limited

Water Pump Impeller – Fits Yamaha 8/9.9/15 HP (Replaces 682-44352-03-00)

$18.50

Water Pump Impeller – Fits Yamaha 8/9.9/15 HP (Replaces 682-44352-03-00)

$18.50

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.

  • Installation Location: Mounts inside the water pump housing in the lower unit/gear case.
  • Durable Material: Constructed from high-quality neoprene rubber for reliable performance.
  • 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

Explosion Diagram

Installation Guide

  1. Disconnect Power: Disconnect the spark plug leads and the negative battery terminal for safety.
  2. Access Lower Unit: Shift the outboard into neutral. Remove the bolts securing the lower unit (gear case) to the engine leg.
  3. Remove Water Pump Housing: Carefully detach the lower unit. Locate and unbolt the water pump housing cover.
  4. Replace Impeller: Note the rotational direction of the old impeller fins before removing it. Remove the old impeller and Woodruff key.
  5. 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.
  6. 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.
  7. 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?

  • Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
  • Fast Global Shipping: Free delivery worldwide in 5–15 days.
  • Direct from Manufacturer: Competitive pricing without compromising quality.

We can ship to virtually any address in the world with free shipping available for most regions.

For our typical US and Canadian customers , our shipping timeframes are as follows:

  • Amazon FBA: orders will be delivered within 1-5 business days after placing the order (during certain special periods such as major promotions, Christmas, etc., the delivery time of Amazon FBA may be affected).
  • US warehouse shipment: orders will be delivered within 5 days after placing the order.
  • China warehouse shipment: orders will be delivered about 12 days after placing the order.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Founded in 2002, JLM Marine has established itself as a dedicated manufacturer of high-quality marine parts, based in China. Our commitment to excellence in manufacturing has earned us the trust of top marine brands globally.

As a direct supplier, we bypass intermediaries, which allows us to offer competitive prices without compromising on quality. This approach not only supports cost-efficiency but also ensures that our customers receive the best value directly from the source.

We are excited to expand our reach through retail channels, bringing our expertise and commitment to quality directly to boat owners and enthusiasts worldwide.

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