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You may return most new, unopened items within 30 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.
This water pump impeller service kit is designed for Yamaha 2-Stroke 4HP and 5HP outboards (1988–2019) and 4-Stroke F4, F5, and F6 1-cylinder models (1998–2011). It provides all the necessary components to service and restore your engine's cooling system.
This kit is a direct replacement for Yamaha OEM part numbers 6E0-W0078-A2-00, 6E0-W0078-00-00, 6E0-W0078-01-00, 6E0-W0078-02-00, and 6E0-W0078-A3-00.
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
Brand | Part Number |
---|---|
Yamaha | 6E0-W0078-A2-00 |
Yamaha | 6E0-W0078-00-00 |
Yamaha | 6E0-W0078-01-00 |
Yamaha | 6E0-W0078-02-00 |
Yamaha | 6E0-W0078-A3-00 |
Sierra | 18-3410 |
AM | AM6E0-W0078-A2 |
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 | 4A, 4AC, 4ACMH, 4CMH | 4 | 2-Stroke | 1988–2019 | 6E0-W0078-A2-00 | |
Yamaha | 5C, 5CM, 5CMH | 5 | 2-Stroke | 1988–2015 | 6E0-W0078-A2-00 | |
Yamaha | F4 | 4 | 4-Stroke | 1998–2011 | 6E0-W0078-A2-00 | 1-cylinder models |
Yamaha | F5 | 5 | 4-Stroke | 1998–2011 | 6E0-W0078-A2-00 | 1-cylinder models |
Yamaha | F6 | 6 | 4-Stroke | 1998–2011 | 6E0-W0078-A2-00 | 1-cylinder models |
Specification | Value |
---|---|
Product Type | Water Pump Impeller Repair Kit |
Installation | Direct replacement |
Housing Material | Rubber (impeller), Aluminum/Alloy (components) |
Housing Color | Black (impeller), Silver (metal parts) |
Fitting Type | Direct fit |
Other Technical Attributes | Complete service kit for water pump impeller replacement |
Q: How do I confirm this kit fits my Yamaha engine?
A: First, check the "Compatible Engine Models" table to ensure your engine's model and year range are listed. This kit is specifically for Yamaha 2-Stroke 4HP/5HP (1988–2019) and 4-Stroke F4/F5/F6 (1998–2011) 1-cylinder models. Second, verify your current part number matches one of the numbers in the cross-reference list, such as 6E0-W0078-A2-00.
Q: What are the signs my water pump impeller is failing?
A: The most common signs are the engine overheating, an alarm sounding (if equipped), or a weak or non-existent water stream from the "tell-tale" cooling system outlet. Upon inspection, a failing impeller may be cracked, brittle, or have broken vanes.
Q: How often should I replace the water pump impeller?
A: For preventative maintenance, it is best practice to inspect the impeller annually and replace it every 1-2 years or every 100-200 hours of operation. Replacement frequency depends on usage and water conditions (e.g., saltwater and sandy/silty water cause more wear).
Q: OEM vs. Aftermarket?
A: 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.
Q: How fast do you ship and how much does it cost?
A: 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.
Q: What is your warranty and return policy?
A: 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.
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:
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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