Water Pump Impeller – Fits Honda 9.9HP/15HP (Replaces 19210-ZV4-013, 19210-ZV4-651)

$13.30

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.).

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.

Delivery and Shipping

Free standard shipping on all orders under 1 KG

If you have any questions, feel free to email us at info@sierramarines.com, and we’ll get back to you within 20–36 hours.

Product Details

This replacement Water Pump Impeller – Fits Honda 9.9HP/15HP Outboards is designed for 4-Stroke BF9.9 and BF15 A-series models manufactured between 1997 and 2002. It is engineered from a durable blend of neoprene rubber and a corrosion-resistant brass hub to ensure reliable cooling performance.

It serves as a direct interchange for Honda OEM parts 19210-ZV4-013 (flat keyway) and 19210-ZV4-651 (normal keyway), as well as aftermarket equivalents from Sierra and GLM.

Engineered for direct-fit installation.
Constructed with high-quality neoprene and brass for longevity.
Available with a flat or normal keyway to match your engine's requirements.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Brand	Part Number	Notes
Honda	19210-ZV4-013	Flat Keyway
Honda	19210-ZV4-651	Normal Keyway
Sierra	18-3246
Sierra	18-3247
GLM	91010
GLM	91009
Aftermarket	500328
Aftermarket	9-45101

Engine & Model Compatibility

Confirm your engine model/year in the table below.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.	Notes
Honda	BF9.9AH	9.9	4-Stroke	Pre-1997	19210-ZV4-013	Flat keyway
Honda	BF9.9AK	9.9	4-Stroke	Pre-1997	19210-ZV4-013	Flat keyway
Honda	BF9.9AM (Short Shaft)	9.9	4-Stroke	1997	19210-ZV4-013	Only for Serial #BABS-1200001 through BABS-1200680, flat keyway
Honda	BF9.9AM (Long Shaft)	9.9	4-Stroke	1997	19210-ZV4-013	Only for Serial #BABL-1200001 through BABL-1200827, flat keyway
Honda	BF9.9AW	9.9	4-Stroke	1997–2002	19210-ZV4-651	Normal keyway
Honda	BF9.9B	9.9	4-Stroke	1997–2002	19210-ZV4-651	Normal keyway
Honda	BF9.9AH/AX/B	9.9	4-Stroke	1997–2002	19210-ZV4-651	Normal keyway
Honda	BF15AH	15	4-Stroke	Pre-1997	19210-ZV4-013	Flat keyway
Honda	BF15AK	15	4-Stroke	Pre-1997	19210-ZV4-013	Flat keyway
Honda	BF15AM (Short Shaft)	15	4-Stroke	1997	19210-ZV4-013	Only for Serial #BAAS-1200001 through BAAS-1201182, flat keyway
Honda	BF15AM (Long Shaft)	15	4-Stroke	1997	19210-ZV4-013	Only for Serial #BAAL-1200001 through BAAL-1201052, flat keyway
Honda	BF15AW	15	4-Stroke	1997–2002	19210-ZV4-651	Normal keyway
Honda	BF15B	15	4-Stroke	1997–2002	19210-ZV4-651	Normal keyway
Honda	BF15AH/AX/B	15	4-Stroke	1997–2002	19210-ZV4-651	Normal keyway

Technical Specs

Product Type: Water Pump Impeller
Installation: Direct replacement
Material: Neoprene and brass
Dimensions: Diameter: 41mm, Thickness: 27.55-28.55mm, Shaft: 13.15-14.10mm
Keyway Type: Available in flat keyway (19210-ZV4-013) or normal keyway (19210-ZV4-651)
OEM Cross Reference: Honda 19210-ZV4-013, Honda 19210-ZV4-651
Aftermarket Cross Reference: Sierra 18-3246, 18-3247, GLM 91010, 91009, 500328, 9-45101

What’s in the Box

1 x Water Pump Impeller (19210-ZV4-013 or 19210-ZV4-651)

Installation Notes

Disconnect the negative battery cable before starting.
Remove the bolts securing the lower unit (gearcase) to the engine.
Carefully lower the gearcase to expose the water pump assembly on the driveshaft.
Remove the water pump housing bolts and slide the housing off the driveshaft.
Take note of the old impeller's orientation, then remove it and the drive key.
Inspect the pump housing, wear plate, and seals for scoring or damage. Replace if necessary.
Lightly grease the new impeller and the inside of the housing with marine grease.
Install the new key and slide the new impeller onto the driveshaft.
Align the impeller vanes with the housing and slide it down while turning the driveshaft clockwise.
Reinstall the housing, reassemble the gearcase to the engine, and torque all bolts to specification.
Reconnect the battery and test the engine in water to verify strong water flow from the telltale outlet.

Troubleshooting & FAQ

What's the difference between the 19210-ZV4-013 and 19210-ZV4-651 impellers?

The primary difference is the keyway type. Part 19210-ZV4-013 uses a flat keyway, common in pre-1997 and specific 1997 models. Part 19210-ZV4-651 uses a normal (or 'D-shaped') keyway, found in most 1997–2002 models. Please verify your exact model and serial number in our compatibility table.

How can I identify the correct impeller for my engine?

Check your engine's model and serial number. The compatibility table on this page lists the specific Honda models, years, and corresponding OEM part numbers. Pre-1997 models and certain 1997 serial number ranges use the flat keyway impeller (19210-ZV4-013), while later models use the normal keyway (19210-ZV4-651). When in doubt, visual comparison to your old part is recommended.

What are the signs of a failing water pump impeller?

Common symptoms include the engine overheating at idle or low speeds, a weak or intermittent water stream from the "telltale" outlet, or an alarm from the engine's temperature sensor. A dry, cracked, or brittle impeller should be replaced immediately, even if it has not failed completely.

How often should I replace my outboard's impeller?

For preventative maintenance, it is recommended to inspect the impeller annually and replace it every 1 to 2 years, or every 100-200 hours of use. Replacement intervals should be shorter for boats operated in saltwater or in water with heavy sediment.

OEM vs. Aftermarket?

This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.

Shipping speed & cost?

We ship worldwide quickly—typical transit 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 issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in 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.

Payment & Security

Payment methods

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.