Water Pump Impeller – Fits Yamaha 9.9-15 HP Outboards (Replaces 63V-44352-01-00, 6E5-44352-01-00)

$16.90

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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 Water Pump Impeller – Fits Yamaha 9.9-15 HP Outboards is a crucial component for engine cooling system maintenance. Designed for both 2-stroke and 4-stroke Yamaha models from 1984 to the present, it helps prevent engine overheating by ensuring proper water circulation.

It serves as a direct replacement for Yamaha parts 63V-44352-01-00 and 6E5-44352-01-00, as well as several aftermarket equivalents from Quicksilver and Sierra.

Installation Location: Mounts inside the lower unit water pump housing.
Preventative Maintenance: Replace every 2-3 years to maintain cooling efficiency and prevent engine damage.
Core Component: Package contains the impeller only; hardware and housing are sold separately.

Part Number Matrix

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

Brand	Part Number
Yamaha	63V-44352-01-00
Yamaha	6E5-44352-01-00
Yamaha	682-W0078-00
Quicksilver	8M6010335
Sierra	18-3040

Engine & Model Compatibility

Confirm your engine model/year in the table below.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.
Yamaha	F9.9	9.9	4-Stroke		63V-44352-01-00/6E5-44352-01-00
Yamaha	FT9.9	9.9	4-Stroke		63V-44352-01-00/6E5-44352-01-00
Yamaha	T9.9	9.9	4-Stroke		63V-44352-01-00/6E5-44352-01-00
Yamaha	15C	15	4-Stroke		63V-44352-01-00/6E5-44352-01-00
Yamaha	9.9D/E9.9D	9.9	2-Stroke	1984–1995	682-W0078-00/682-W0078-01/682-W0078-A1/682-W0078-A2/682-W0078-A3
Yamaha	15D/E15D	15	2-Stroke	1984–1995	682-W0078-00/682-W0078-01/682-W0078-A1/682-W0078-A2/682-W0078-A3

Technical Specs

Product Type: Water Pump Impeller
Installation: Lower Unit Water Pump
Material: High-Quality Rubber
Blade Configuration: 6-Blades
Replacement Interval: Every 2-3 years (per manufacturer recommendation)

What’s in the Box

1 x Water Pump Impeller (Replaces 63V-44352-01-00/6E5-44352-01-00)

Installation Notes

Disconnect the battery and shift the outboard into neutral.
Remove the lower unit (gearcase) bolts and carefully separate it from the upper casing.
Locate and unbolt the water pump housing cover to expose the old impeller.
Note the rotational direction of the existing impeller blades before removing it.
Clean the housing interior and install the new impeller, ensuring the blades are oriented correctly.
Reassemble the water pump housing, apply new gaskets if needed (sold separately), and remount the lower unit.

Troubleshooting & FAQ

What engines does this impeller fit?

This impeller is designed for a wide range of Yamaha 9.9 HP and 15 HP outboards, including both 2-stroke and 4-stroke models from 1984 to present. Please check the compatibility table for specific models.

How often should I replace the water pump impeller?

For preventative maintenance, most marine mechanics and manufacturers recommend replacing the impeller every 2 to 3 years, or sooner if operating in sandy or debris-heavy water.

What are the signs of a failing impeller?

Common symptoms include a weak or non-existent water stream from the "telltale" outlet, engine overheating alarms, or a noticeable decrease in cooling performance.

Where is this part installed?

The impeller is located inside the water pump housing on the lower unit (gearcase) of your outboard motor.

Does this kit include gaskets or the housing?

This listing is for the impeller only. Gaskets, wear plates, and the housing must be purchased separately. We recommend inspecting these components during impeller replacement.

Is this a genuine Yamaha part?

This is a high-quality aftermarket replacement, not an OEM part. It is engineered to meet or exceed original equipment specifications for fit, form, and function.

How fast is shipping?

We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free, with expedited options available at checkout for most regions.

What is the warranty and return policy?

This product is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter an issue, please contact our support team with your order details. Returns are accepted for unused items in their original condition per our standard return policy.

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.

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