Water Pump Impeller – Fits Mercury/Mariner 6-15 HP, Chrysler Force, Sears 9.9-15 HP (Replaces 47-42038Q02, 47-420382, 47-420381, 47-42038-2, 18-3062)
Water Pump Impeller – Fits Mercury/Mariner 6-15 HP, Chrysler Force, Sears 9.9-15 HP (Replaces 47-42038Q02, 47-420382, 47-420381, 47-42038-2, 18-3062) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Water Pump Impeller – Fits Mercury/Mariner 6-15 HP, Chrysler Force,...
Product Details
This aftermarket Water Pump Impeller is engineered for a broad range of outboards, including Mercury/Mariner 2-stroke (6–15 HP, 1986–2006) and 4-stroke (8–15 HP, 2005 & older) models, as well as select Chrysler Force and Sears 9.9–15 HP outboards from 1998.
It serves as a direct replacement for Mercury part numbers 47-42038Q02, 47-420382, and 47-42038-2, and interchanges with Sierra 18-3062 and Mallory 9-45039.
- Constructed from a durable blend of neoprene and hardened nylon for reliable performance.
- Features 6 precision-molded blades to ensure efficient water flow and engine cooling.
- Installation is straightforward: ensure vanes face the correct direction and lightly lubricate the drive shaft splines.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 47-42038Q02 |
| Mercury | 47-420382 |
| Mercury | 47-420381 |
| Mercury | 47-42038-2 |
| Sierra | 18-3062 |
| Mallory | 9-45039 / 9-45309 |
| GLM Marine | 89451 |
| CEF | 500318 |
| MARKGOO | 47-42038Q02 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury/Mariner owners: This impeller fits specific 2-stroke and 4-stroke models within defined serial number ranges and years. Please verify your engine's details against the table.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury/Mariner | Outboard (2 Cylinder) | 6 | 2-Stroke | 1986–2006 | 47-42038Q02 | USA 0A197112 & above, BEL 9461526 & above |
| Mercury/Mariner | Outboard (2 Cylinder) | 8 | 2-Stroke | 1986–2006 | 47-42038Q02 | USA 0A197112 & above, BEL 9461526 & above |
| Mercury/Mariner | Outboard (2 Cylinder) | 9.9 | 2-Stroke | 1986–2006 | 47-42038Q02 | USA 0A197112 & above, BEL 9461526 & above |
| Mercury/Mariner | Outboard (2 Cylinder) | 10 | 2-Stroke | 1990–2006 | 47-42038Q02 | USA 0A197112 & above, BEL 9461526 & above |
| Mercury/Mariner | Outboard (2 Cylinder) | 15 | 2-Stroke | 1986–2006 | 47-42038Q02 | USA 0A197112 & above, BEL 9461526 & above |
| Mercury | Outboard | 8 | 4-Stroke | 2004 & older | 47-42038Q02 | Standard gearcase |
| Mercury | Outboard | 9.9 | 4-Stroke | 2004 & older | 47-42038Q02 | Standard gearcase |
| Mercury | Outboard | 15 | 4-Stroke | 2005 & older | 47-42038Q02 | Standard gearcase |
| Mercury Mariner | XR10, Sea Pro, Magnum & Marathon | 10 | 2-Stroke | s/n 0D038000 & up | 47-42038Q02 |
Technical Specs
- Product Type
- Water Pump Impeller
- Housing Material
- Neoprene and hardened nylon
- Blades
- 6
- Height
- 11.9 mm (0.47 in)
- Overall Diameter
- 58.8 mm (2.31 in)
- Hub Shaft Diameter
- 12.6 mm (0.50 in)
- Weight
- 9.92 g (0.35 oz)
What’s in the Box
- 1 x Water Pump Impeller (replaces 47-42038Q02)
Installation Notes
For proper installation, ensure the impeller vanes face the correct rotational direction (typically clockwise) when pressing it into the housing. Lightly lubricate the drive shaft splines before assembly to ensure a smooth fit.
Troubleshooting & FAQ
How do I confirm this impeller fits my motor?
First, check your engine's model, horsepower (HP), and year against the compatibility table. Second, cross-reference your existing part number with our Part Number Matrix to confirm it is listed as an equivalent.
What are the signs of a worn-out impeller?
Common symptoms include the engine overheating at idle or low speeds, a weak or non-existent water stream from the "tell-tale" outlet, and a melted water pump housing. Visible signs on the impeller itself include cracked, brittle, or worn-down blades.
What is the recommended replacement interval for an impeller?
For preventative maintenance, we recommend replacing the impeller every 1-2 years or every 100-200 hours of use, depending on operating conditions. Engines used in saltwater or sandy/silty water may require more frequent changes.
Any tips for installing this impeller correctly?
Lubricate the drive shaft splines and the inside of the pump housing with a marine-grade grease. When inserting the impeller, turn the driveshaft in its normal rotational direction (usually clockwise) to help fold the vanes into the correct orientation without damaging them.
How many blades does this impeller have?
This impeller features 6 blades, designed to meet OEM specifications for water flow and pressure.
Is there a difference in material compared to the OEM part?
This aftermarket impeller is made from a high-quality blend of neoprene rubber and a hardened nylon hub, materials that are directly comparable to OEM standards for durability, chemical resistance, and performance in a marine environment.
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.
Payment & Security
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