Water Pump Impeller – Fits Mercury/Mariner 6-15 HP (Replaces 47-42038-2, 47-42038Q02)

$16.00 $25.00

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Water Pump Impeller – Fits Mercury/Mariner 6-15 HP (Replaces 47-42038-2, 47-42038Q02) is backordered and will ship as soon as it is back in stock.

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Product Details

This is a direct replacement Water Pump Impeller – Fits Mercury/Mariner 6-15 HP (Replaces 47-42038-2, 47-42038Q02), designed for a wide range of outboard motors. It is compatible with Mercury/Mariner 2-Stroke 6–15 HP engines (1986–2005), 4-Stroke 8–15 HP engines (1995–2008), and select Force/Chrysler/Sears 9.9–15 HP models from 1998.

It serves as a direct interchange for Mercury 47-42038-2 and 47-42038Q02, Sierra 18-3062, Mallory 9-45309, GLM 89451, WINGOGO 42038Q02, and JLM/Soxa Marine AM47-47-420382.

Easy direct replacement installation
Made from durable neoprene rubber with a bonded center insert to resist tearing
Engineered to maintain consistent water flow for optimal cooling

Part Number Matrix

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

Brand	Part Number
Mercury	47-42038-2
Mercury	47-42038Q02
Sierra	18-3062
Mallory	9-45309
GLM	89451
WINGOGO	42038Q02
JLM/Soxa Marine	AM47-420382

Engine & Model Compatibility

Confirm your engine model and year in the tables below to ensure proper fitment.

Mercury/Mariner 2-Stroke (1986–2005): This impeller fits a wide range of 2-stroke models from 6 HP to 15 HP, including Marathon, SeaPro, and Viking variants. Check your serial number for specific model years.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.	Notes
Mercury/Mariner	Standard Models	6	2-Stroke	1986–2005	47-42038-2/47-42038Q02	Serial A197112 and up
Mercury/Mariner	Standard Models	8	2-Stroke	1986–2005	47-42038-2/47-42038Q02	Serial A197112 and up
Mercury/Mariner	Standard Models	9.9	2-Stroke	1986–2005	47-42038-2/47-42038Q02	Serial A197112 and up
Mercury/Mariner	Marathon	10	2-Stroke	1986–2005	47-42038-2/47-42038Q02
Mercury/Mariner	SeaPro	10	2-Stroke	1986–2005	47-42038-2/47-42038Q02
Mercury/Mariner	Viking	10	2-Stroke	1986–2005	47-42038-2/47-42038Q02
Mercury/Mariner	XR10	10	2-Stroke	1986–2005	47-42038-2/47-42038Q02
Mercury/Mariner	Standard Models	13.5	2-Stroke	1986–2005	47-42038-2/47-42038Q02	International models
Mercury/Mariner	Standard Models	15	2-Stroke	1988–2005	47-42038-2/47-42038Q02	Serial B292414 and up
Mercury/Mariner	Marathon	15	2-Stroke	1988–2005	47-42038-2/47-42038Q02
Mercury/Mariner	SeaPro	15	2-Stroke	1988–2005	47-42038-2/47-42038Q02
Mercury/Mariner	Viking	15	2-Stroke	1988–2005	47-42038-2/47-42038Q02

Mercury/Mariner 4-Stroke (1995–2004): Compatible with non-Bigfoot 4-stroke models from 8 HP to 15 HP. Pay close attention to serial number ranges and engine displacement (cc) to verify fit.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.	Notes
Mercury/Mariner	Bodensee	8	4-Stroke	1995–2004	47-42038-2/47-42038Q02	S/N G760300 & up (232cc)
Mercury/Mariner	Standard	8	4-Stroke	1995–2004	47-42038-2/47-42038Q02	S/N 0T178499 & up (232cc)
Mercury/Mariner	Standard (Non-Bigfoot)	9.9	4-Stroke	1999–2004	47-42038-2/47-42038Q02	S/N 0G760300-0T979999 (232cc)
Mercury/Mariner	Standard (Non-Bigfoot)	15	4-Stroke	1998–2004	47-42038-2/47-42038Q02	S/N 0G590000-1B727495 (323cc)

Force/Chrysler/Sears Outboards (1998): Fits specific 9.9 HP and 15 HP models manufactured in 1998.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.
Force	Standard Models	9.9	2-Stroke	1998	47-42038-2
Force	Standard Models	15	2-Stroke	1998	47-42038-2
Sears	Standard Models	9.9	2-Stroke	1998	47-42038-2
Sears	Standard Models	15	2-Stroke	1998	47-42038-2

Technical Specs

Product Type: Water Pump Impeller
Installation: Direct replacement
Housing Material: Neoprene rubber with bonded center insert
Dimensions: Diameter: 58.8 mm (2.315 in), Depth: 11.9 mm (0.469 in), Shaft Diameter: 12.6 mm (0.496 in)
Other Technical Attributes: Center insert bonded to vanes to resist tearing and maintain water flow

What’s in the Box

1 x Water Pump Impeller (47-42038-2/47-42038Q02)

Installation Notes

Disconnect the spark plug wires and secure the propeller.
Place a drain pan under the lower unit and remove the gearcase oil drain/fill screw to drain the oil.
Remove the bolts securing the lower unit (gearcase) to the engine's upper housing.
Carefully lower and separate the gearcase from the driveshaft housing.
Unbolt and remove the water pump housing cover to expose the old impeller.
Remove the old impeller, noting the rotational direction of the vanes. Clean any debris from the housing.
Lightly grease the new impeller and housing interior with marine grease.
Install the new impeller by turning the driveshaft clockwise while pushing down to correctly orient the vanes.
Reinstall the water pump housing and torque its bolts to manufacturer specifications.
Guide the driveshaft back into the engine and reattach the lower unit.
Refill the gearcase with fresh marine gear oil until it seeps from the upper vent hole.
Securely tighten both gear oil screws and test the engine in water to verify proper cooling.

Troubleshooting & FAQ

How do I confirm this impeller fits my specific engine model?

The best way is to check the compatibility tables on this page against your engine's model, year, and serial number. If your original part has a number stamped on it, cross-reference it with our Part Number Matrix. When in doubt, contact us with your engine details before ordering.

What are common signs of a failing water pump impeller?

Key symptoms include the engine overheating at idle or low speeds, a weak or non-existent stream of water from the "telltale" outlet, and in severe cases, steam from the exhaust. Visible damage like cracked, brittle, or missing vanes on the old impeller also indicates failure.

How often should I replace my outboard's impeller?

As a general maintenance rule, it is recommended to replace the water pump impeller every 1-2 years or every 100-200 hours of use, whichever comes first. Usage in saltwater or sandy/silty conditions may require more frequent replacement.

Is this impeller more durable than the original?

This impeller is manufactured to meet or exceed OEM specifications. It features a durable neoprene rubber compound and a center insert that is chemically bonded to the vanes, which provides excellent resistance to tearing and ensures a long service life under normal operating conditions.

Why is there no water coming out of the telltale port after installation?

This could be due to a few issues: 1) The impeller vanes may have been folded in the wrong direction during installation. 2) A blockage (e.g., old impeller debris, mud) may be present in the water passages or telltale tube. 3) The water pump housing or gaskets may not be sealed correctly. Disassemble and inspect your work carefully.

Can I install this impeller myself?

Yes, this is a common DIY maintenance task for those with mechanical experience and the right tools. However, it involves removing the lower unit, which can be heavy and complex. If you are not confident, we recommend professional installation to ensure safety and proper function.

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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