Water Pump Impeller – Fits Mercury MerCruiser 4.3L, 5.0L, 5.7L, 7.4L V8 Engines (Replaces 47-59362Q01)
Water Pump Impeller – Fits Mercury MerCruiser 4.3L, 5.0L, 5.7L, 7.4L V8 Engines (Replaces 47-59362Q01) 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).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Water Pump Impeller – Fits Mercury MerCruiser 4.3L, 5.0L, 5.7L, 7.4...
Product Details
This Water Pump Impeller is engineered for Mercury MerCruiser 4.3L, 5.0L, 5.7L, and 7.4L V8 engines with Bravo drives, model years 1999 and older. It serves as a crucial component for the engine cooling system, designed for installation in engine-mounted, two-piece plastic sea water pumps.
This part serves as a direct replacement for Mercury MerCruiser part numbers 47-59362Q01, 47-59362T1, 47-59362A1, and 47-59362, and is interchangeable with Sierra 18-3087 and CEF Marine CEF500109.
- Installs in an engine-mounted, two-piece plastic sea water pump housing.
- Constructed from durable neoprene rubber with a solid plastic hub for longevity.
- Features an 8-blade design to ensure efficient engine cooling performance.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury MerCruiser | 47-59362Q01 |
| Mercury MerCruiser | 47-59362T1 |
| Mercury MerCruiser | 47-59362A1 |
| Mercury MerCruiser | 47-59362 |
| Sierra | 18-3087 |
| CEF Marine | CEF500109 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Fitment is for MerCruiser engines with engine-mounted sea water pumps, typically models from 1999 and older.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| MerCruiser | 4.3L Carb/EFI (Bravo) | 4.3L | 4-Stroke | Up to 1999 | 47-59362Q01 | Engine-mounted sea water pump |
| MerCruiser | 5.0L Carb/EFI (Bravo) | 5.0L | 4-Stroke | Up to 1999 | 47-59362Q01 | Engine-mounted sea water pump |
| MerCruiser | 5.7L Carb/EFI (Bravo) | 5.7L | 4-Stroke | Up to 1999 | 47-59362Q01 | Engine-mounted sea water pump |
| MerCruiser | 350 Mag EFI (Bravo) | 350 | 4-Stroke | Up to 1999 | 47-59362Q01 | Engine-mounted sea water pump |
| MerCruiser | 7.4L Carb/EFI (Bravo) | 7.4L | 4-Stroke | Up to 1999 | 47-59362Q01 | Engine-mounted sea water pump |
| MerCruiser | 454 Mag Carb/EFI (Bravo) | 454 | 4-Stroke | Up to 1999 | 47-59362Q01 | Engine-mounted sea water pump |
| MerCruiser | 502 Mag Carb/EFI (Bravo) | 502 | 4-Stroke | Up to 1999 | 47-59362Q01 | Engine-mounted sea water pump |
| MerCruiser | Bravo I, II, III TR TRS | Various | 4-Stroke | Up to 1999 | 47-59362Q01 | For sterndrive applications |
Technical Specs
- Product Type
- Sea Water Pump Impeller
- Installation
- Engine-mounted water pump
- Material
- Neoprene Rubber with Plastic Hub
- Number of Blades
- 8
- Housing Type
- Two-piece plastic housing
- Dimensions
- External Diameter: 66.78 mm (2 5/8"), Height: 51.17 mm (2 1/64"), Shaft Insert Diameter: 19.04 mm (3/4")
- Weight
- 0.094 kg (0.21 lb)
- Application
- Engine cooling system
- Warranty
- 1 Year (aftermarket); OEM warranty varies
- Other Technical Attributes
- For MerCruiser engines with engine-mounted, two-piece, plastic sea water pumps
What’s in the Box
- 1x Impeller (Replaces 47-59362Q01/47-59362T1/47-59362A1/47-59362)
Installation Notes
- Turn off the engine and disconnect the battery terminals for safety.
- Close the water inlet seacock to prevent water from flooding the engine bay.
- Locate the sea water pump on the engine and place a bucket or rags underneath to catch spills.
- Carefully remove the bolts holding the pump cover in place.
- Note the orientation of the impeller blades before removing the old impeller with pliers or an impeller puller tool.
- Clean the interior of the pump housing, checking for scoring or debris.
- Lightly lubricate the new impeller and housing interior with a marine-safe, water-based lubricant.
- Install the new impeller, ensuring the blades are bent in the correct rotational direction.
- Reinstall the pump cover with a new gasket, tightening the bolts to the manufacturer's torque specifications.
- Open the seacock fully.
- Reconnect the battery, start the engine, and immediately check for water leaks and proper water flow at the exhaust.
Troubleshooting & FAQ
How do I know if this impeller fits my MerCruiser engine?
This impeller fits MerCruiser V8 engines (4.3L, 5.0L, 5.7L, 7.4L) with Bravo drives, from 1999 and older, that use an engine-mounted, two-piece plastic sea water pump. Please cross-reference part numbers like 47-59362Q01 and check the detailed compatibility list on this page.
What are the common signs of a failing water pump impeller?
Key indicators include the engine running hotter than normal, a noticeable reduction in water flow from the exhaust outlets, strange noises from the pump area, or finding brittle, cracked, or missing blades during a visual inspection.
How often should I replace my engine's impeller?
For preventative maintenance, we recommend inspecting your impeller annually and replacing it every 1-2 years or every 100-200 hours of use. If you operate in sandy, silty, or debris-heavy water, more frequent replacement is advised.
Can I install this impeller myself?
Yes, replacing an impeller is a common maintenance task for boat owners with basic mechanical skills. However, if you are unsure about the process or do not have the proper tools, we recommend seeking professional assistance to ensure it's done correctly.
What is the difference between this aftermarket impeller and an OEM one?
This is an aftermarket part built to meet or exceed original equipment manufacturer (OEM) specifications for performance and fit. It uses comparable high-quality materials (neoprene and plastic) but is available at a more competitive price.
What kind of lubricant is safe to use for installation?
Always use a water-based marine lubricant or simple, non-petroleum dish soap to lubricate the impeller and housing. Avoid petroleum-based grease, as it will degrade and damage the neoprene rubber, leading to premature failure.
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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