Water Pump Impeller Kit – Fits Mercury/Mercruiser 150/175/200HP 2-Stroke (Replaces 46-96148A5)

$29.00

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Water Pump Impeller Kit – Fits Mercury/Mercruiser 150/175/200HP 2-Stroke (Replaces 46-96148A5) is backordered and will ship as soon as it is back in stock.

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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).

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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 Kit is engineered for a wide range of Mercury/Mercruiser 2-Stroke Outboards from 65 HP to 220 HP, primarily from the 1980s and 1990s, as well as MerCruiser Stern Drives including Pre-Alpha (1970–1983) and Alpha One (1983–1990) models.

It serves as a direct aftermarket replacement for multiple Mercury part numbers, including 46-96148A5, 46-96148A8, 46-96148Q8, and others, providing a reliable alternative for engine maintenance.

Designed as a direct-fit replacement for simplified installation.
Specifically engineered for 2-Stroke Mercury and MerCruiser engines.
Kit includes the essential water pump impeller for service.

Part Number Matrix

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

Brand	Part Number
Mercury	46-96148A5
Mercury	46-96148A8
Mercury	46-96148Q8
Mercury	46-96148T8
Mercury	46-42579A4
Mercury	46-44292A4
Mercury	46-48747A3

Engine & Model Compatibility

Confirm your engine model/year in the table below.

For Mercury outboards, verify your model, horsepower, and serial number range to ensure correct fitment. Note that some horsepower ratings apply to specific cylinder configurations or exclude certain models like the V-200 DFI.

For MerCruiser stern drives, this kit fits Pre-Alpha and Alpha One models within the specified year and serial number ranges.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.	Notes
Mercury	150HP	150	2-Stroke	Serial # 3502806 & Up	46-96148A5
Mercury	175HP	175	2-Stroke	Serial # 4301235 & Up	46-96148A5
Mercury	200HP	200	2-Stroke	Serial # 4839034 & Up	46-96148A5	Not including V-200 DFI 3.0L
Mercury	65HP	65	2-Stroke	Serial # 1542745–3293183	46-96148A5	4 Cylinder
Mercury	70HP	70	2-Stroke	Serial # 1503959–1566239	46-96148A5	4 Cylinder
Mercury	75HP	75	2-Stroke	Serial # 6432901 & Up	46-96148A5	4 Cylinder
Mercury	80HP	80	2-Stroke	Serial # 2559001–6432900	46-96148A5
Mercury	85HP	85	2-Stroke	Serial # 1566240–4861998	46-96148A5
Mercury	90HP	90	2-Stroke	Serial # 1766824 & Up	46-96148A5
Mercury	100HP SS	100	2-Stroke	Serial # 1503332–2836018	46-96148A5
Mercury	110HP	110	2-Stroke	Serial # 1870204–2314955	46-96148A5
Mercury	115HP	115	2-Stroke	Serial # 2836019 & Up	46-96148A5	6 Cylinder
Mercury	125HP	125	2-Stroke	Serial # 2314956–2839368	46-96148A5
Mercury	135HP	135	2-Stroke	Serial # 2839369–3293233	46-96148A5
Mercury	140HP	140	2-Stroke	Serial # 3293234 & Up	46-96148A5
Mercury	220HP	220	2-Stroke	Serial # OB117316 & Up	46-96148A5
MerCruiser	Pre-Alpha			1970–1983	46-96148A5
MerCruiser	Alpha One			1983–1990	46-96148A5	Serial numbers 2495186–0D469858

Technical Specs

Product Type: Water Pump Impeller Kit
Installation: Direct Replacement
Other Technical Attributes: Designed for 2-Stroke Mercury outboard engines

What’s in the Box

1 x Water Pump Impeller

Installation Notes

Disconnect the battery and ensure the engine is completely cool before starting.
Remove the lower unit (gearcase) from the outboard or stern drive. Refer to your service manual for specific instructions.
Unbolt and carefully separate the water pump housing components.
Note the rotational direction of the old impeller's fins for correct installation of the new one.
Remove the old impeller, key, gaskets, and seals. Thoroughly clean all mating surfaces.
Install new gaskets and seals as required for your model.
Slide the new impeller onto the drive shaft, turning the shaft clockwise to correctly bend the fins into the housing.
Reinstall the water pump housing and torque the bolts to the manufacturer's specifications.
Reattach the lower unit, reconnect the battery, and test the engine in water.
Confirm a strong, steady stream of water from the tell-tale outlet before operating the vessel.

Troubleshooting & FAQ

How do I know if this impeller kit fits my specific engine?

Check the compatibility tables on this page. It is crucial to match your engine's brand, model, horsepower, and especially the serial number range to ensure a perfect fit. When in doubt, compare the photos to your old part before ordering.

What are the signs of a failed water pump impeller?

Common signs include the engine overheating at idle or low speeds, a weak or non-existent water stream from the "tell-tale" outlet, and in some cases, a high engine temperature alarm. A damaged impeller can cause severe engine damage if not addressed promptly.

How often should I replace my water pump impeller?

As a general rule, it's recommended to inspect the impeller annually and replace it every 1–2 years or every 100-200 hours of use. Service intervals can vary based on operating conditions (e.g., saltwater vs. freshwater, sandy/silty water).

Is this kit difficult to install?

Installation is a common maintenance task for those with mechanical experience. It involves removing the lower unit, which can be heavy and awkward. If you are not comfortable with this process or lack the proper tools, professional installation is highly recommended.

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.

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