Water Pump Impeller Service Kit – Fits Mercury, Tohatsu, Nissan 2.2–3.3 HP (Replaces 47-952892, 309-65021-1)

$13.49 $21.00

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Water Pump Impeller Service Kit – Fits Mercury, Tohatsu, Nissan 2.2–3.3 HP (Replaces 47-952892, 309-65021-1) is backordered and will ship as soon as it is back in stock.

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 Water Pump Impeller Service Kit is a high-quality aftermarket solution for various Mercury, Tohatsu, Nissan, Johnson, and Evinrude 2-stroke outboards. It is designed to restore cooling performance for a range of 2 HP to 3.5 HP engines manufactured between 1991 and 2006.

The kit serves as a direct cross-reference for multiple part numbers, including Mercury 47-952892, Nissan/Tohatsu 309-65021-1, Sierra 18-45312, and Johnson/Evinrude 0114812.

Installs as a direct replacement for the original factory part.
Engineered with a durable neoprene impeller and a hardened nylon hub for longevity.
Includes the essential impeller, O-ring, and pins for a complete service.

Part Number Matrix

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

Brand	Part Number
Mercury	47-95289
Mercury	47-95289-1
Mercury	47-952891
Mercury	47-95289-2
Mercury	47-952892
Johnson/Evinrude	0114812
Johnson/Evinrude	114812
Nissan/Tohatsu	309-65021-1
Nissan/Tohatsu	309-65021-1M
Nissan/Tohatsu	309-65021-0
Sierra	18-45312
Mallory	9-45312

Engine & Model Compatibility

Confirm your engine model and year in the table below to ensure correct fitment.

For Mercury/Mariner owners: Please verify your engine's serial number (S/N) to ensure an exact match, as fitment can vary within the same model year.

For Tohatsu/Nissan owners: This part fits specific 2-stroke models from 2002–2005. Check your model designation (e.g., M2.5A2, NS3.5A) against the list.

For Johnson/Evinrude owners: Compatibility covers select small outboards from the 1990s and early 2000s. Verify your horsepower and year range.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.	Notes
Mercury	2HP	2	2-Stroke	1991	47-952892	S/N 8075603 & up; Also 7002201YK model
Mercury	2HP	2	2-Stroke		47-952892	S/N 0T894577 & up
Mercury	2HP	2	2-Stroke		47-952892	S/N 0T884302–0T894576
Mercury	2.2M	2.2	2-Stroke		47-952892	S/N 8075603 & up
Mercury	2.5HP	2.5	2-Stroke		47-952892	S/N 0A855097–0G710612
Mercury	2.5HP	2.5	2-Stroke		47-952892	S/N 0T894577 & up
Mercury	2.5HP	2.5	2-Stroke		47-952892	S/N 0P401000 & up
Mercury	2.5HP	2.5	2-Stroke		47-952892	S/N 0P017000–0P400999
Mercury	2.5HP	2.5	2-Stroke		47-952892	S/N 0G710613–0T894576
Mercury	3HP	3	2-Stroke		47-952892	S/N 0A855097–0G710612
Mercury	3.3HP (Non-Shift)	3.3	2-Stroke		47-952892	S/N 0D901217–0G710612
Mercury	3.3HP	3.3	2-Stroke		47-952892	S/N 0T894577 & up
Mercury	3.3HP	3.3	2-Stroke		47-952892	S/N 0P401000 & up
Mercury	3.3HP	3.3	2-Stroke		47-952892	S/N 0P017000–0P400999
Mercury	3.3HP	3.3	2-Stroke		47-952892	S/N 0G710613–0T894576
Tohatsu	M2.5A, M2.5A2	2.5	2-Stroke	2002–2005	309-65021-1
Nissan	NS2.5A, NS2.5A2	2.5	2-Stroke	2002–2005	309-65021-1
Tohatsu	M3.5A, M3.5A2	3.5	2-Stroke	2005	309-65021-1
Nissan	NS3.5A, NS3.5A2	3.5	2-Stroke	2005	309-65021-1
Johnson/Evinrude	Various	2	2-Stroke	1993–2001	0114812/114812
Johnson/Evinrude	Various	2.3	2-Stroke	1996–1999	0114812/114812
Johnson/Evinrude	Various	3	2-Stroke	1998, 2000–2001	0114812/114812
Johnson/Evinrude	Various	3.3	2-Stroke	1991–1997	0114812/114812

Technical Specs

Product Type: Water Pump Impeller Service Kit
Installation: Direct replacement
Material: Neoprene impeller with hardened nylon hub
Blades: 6
Overall Diameter: 43 mm (1.69 in)
Height: 14.3 mm (0.56 in)
Shaft Diameter: 12 mm (0.47 in)
Weight: Approx. 9 g (0.32 oz)
Warranty: 1 Year

What’s in the Box

1 x Water Pump Impeller
1 x O-ring
2 x Impeller Pin

Installation Notes

Disconnect the battery and remove the engine cover.
Locate and unbolt the lower unit (gearcase) from the upper engine housing.
Carefully lower the gearcase to access the water pump assembly.
Remove the water pump housing bolts and lift the housing to expose the old impeller.
Remove the old impeller, key, O-ring, and any gaskets. Clean all mating surfaces thoroughly.
Install the new components from the kit. Lightly lubricate the impeller and housing interior.
Reinstall the pump housing, ensuring a proper seal. Tighten bolts to the manufacturer's torque specs.
Re-install the lower unit, making sure the water tube, driveshaft, and shift shaft are correctly aligned.
Once assembled, test the engine in water to confirm a strong, steady stream from the tell-tale port.

Troubleshooting & FAQ

How do I know if this impeller needs replacing?

Signs of a failing impeller include a weak or no water stream from the engine's tell-tale port, an engine overheating alarm, or visible damage like cracks and missing blades on the old part. As a rule of thumb, replace it every 1-2 seasons as preventative maintenance.

Will this fit my engine if my model is not listed?

No. You must only use this kit if your specific engine model, year, and serial number (for Mercury) are listed in our compatibility chart. Using the wrong impeller will cause cooling failure and risks severe engine damage.

Is this an OEM part?

This is an aftermarket replacement part, not an OEM component. It is built to meet or exceed OEM-level specifications using comparable high-quality materials and is manufactured in an ISO 9002 facility with batch inspections for quality control.

What are the shipping and delivery times?

We ship worldwide, with a typical transit time of 5–15 days for standard delivery. Standard shipping is free on most orders, and expedited options are shown at checkout where available.

What is the warranty and return policy?

This part is covered by a 1-year warranty against manufacturing defects under normal use. Should an issue arise, contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. Please see our policy page for full details.

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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