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

$18.99 $30.00

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

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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 designed for Mercury/Mariner 6–15 HP (2-stroke & 4-stroke) outboard engines from 1997 and newer (serial A197112 and up), and Force 9.9–15 HP models from 1998. It provides a reliable solution for maintaining your engine's cooling system performance.

The kit serves as a direct interchange for Mercury part numbers 47-42038Q02, 47-42038-2, 47-420381, and 47-420382. It also cross-references with Sierra 18-3062, Mallory 9-45309, and Quicksilver 42038Q02.

Engineered as a direct replacement for a straightforward installation.
Constructed with a durable neoprene rubber impeller and non-asbestos gaskets.
Suitable for both saltwater and freshwater environments.

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
Mercury	47-420381
Mercury	47-420382
Quicksilver	42038Q02
Sierra	18-3062
Mallory	9-45309
GHmarine	42038

Engine & Model Compatibility

Confirm your engine model and serial number range in the table below to ensure accurate fitment.

For Mercury/Mariner models, fitment primarily depends on the engine serial number. For Force engines, it is based on the model year.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.	Notes
Mercury/Mariner	6 HP	6	2 & 4-Stroke	1997 and up (Serial A197112-UP)	47-42038-2
Mercury/Mariner	8 HP	8	2 & 4-Stroke	1997 and up (Serial A197112-UP)	47-42038-2
Mercury/Mariner	8 HP Bodensee	8	4-Stroke	Serial G760300-UP	47-42038-2	Special emissions model
Mercury/Mariner	9.9 HP	9.9	2 & 4-Stroke	1997 and up (Serial A197112-UP)	47-42038-2
Mercury/Mariner	9.9 HP (4-Stroke)	9.9	4-Stroke	Standard Case G760300–T979999	47-42038-2
Mercury/Mariner	XR10 SeaPro	9.9	2-Stroke	Serial D038000-UP	47-42038-2	Commercial variant
Mercury/Mariner	10 HP	10	2-Stroke		47-42038-2
Mercury/Mariner	15 HP	15	2 & 4-Stroke	Serial B292414-UP	47-42038-2
Mercury/Mariner	15 SeaPro	15	2-Stroke	Serial G044365-UP	47-42038-2	Commercial variant
Force	9.9 HP	9.9	2-Stroke	1998	47-42038-2
Force	15 HP	15	2-Stroke	1998	47-42038-2

Technical Specs

Product Type: Water Pump Impeller Kit
Installation: Direct replacement
Material: Neoprene rubber (impeller), Non-asbestos gasket material
Engine Cooling: Raw water (external water source)
Color: Black
Compatible Engine Types: 2-Stroke and 4-Stroke outboard engines
Other Technical Attributes: Designed for salt and fresh water use

What’s in the Box

1 x Neoprene Impeller (47-42038-2)
1 x Gasket (27-19202)
1 x Gasket (27-19204-3)
1 x Impeller Key (47-42038)

Installation Notes

Disconnect the spark plug wires and the negative battery terminal for safety.
Place the outboard gear shift into the neutral position.
Remove the bolts securing the lower unit (gearcase) to the engine's upper section and carefully lower it.
Unbolt and remove the water pump housing to access the old impeller. Note the orientation of the impeller vanes.
Clean any debris or corrosion from the housing interior and wear plate.
Install the new impeller, gaskets, and key provided in the kit. Lubricate the housing and impeller with a marine-safe lubricant.
Reinstall the water pump housing, ensuring bolts are torqued to manufacturer specifications.
Reattach the lower unit to the engine, making sure the driveshaft, shift shaft, and water tube are correctly aligned.
Reconnect the battery and spark plug wires. Test the engine using a water supply (flusher or in water) to verify proper water pump operation.

Troubleshooting & FAQ

How do I confirm this kit fits my specific Mercury outboard?

Fitment for Mercury and Mariner engines is determined by the serial number, not just the model year. Please compare your engine's serial number to the ranges listed in the compatibility table (e.g., "A197112 and up"). If your engine falls within the specified range, this kit is compatible.

What are the signs of a failing water pump impeller?

Common symptoms include the engine overheating at idle or low speeds, a weak or inconsistent stream of water from the "tell-tale" outlet, and in severe cases, a steam or high-temperature alarm. Visual inspection may reveal cracked, brittle, or missing impeller vanes.

How often should I replace my outboard's impeller?

As a preventative maintenance measure, it is recommended to replace the impeller every one to two years, or every 100-200 hours of operation, whichever comes first. Usage in sandy or silty water may require more frequent changes.

Can I use this impeller kit in both saltwater and freshwater?

Yes. The impeller is made from durable neoprene rubber and the gaskets use marine-grade materials, making the kit fully suitable for use in both salt and freshwater environments.

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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