Water Pump Impeller – Fits Mercury/MerCruiser 4.3L, 5.0L, 5.7L, 7.4L, 8.2L (Replaces 47-59362T1)
Water Pump Impeller – Fits Mercury/MerCruiser 4.3L, 5.0L, 5.7L, 7.4L, 8.2L (Replaces 47-59362T1) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Water Pump Impeller – Fits Mercury/MerCruiser 4.3L, 5.0L, 5.7L, 7.4...
Water Pump Impeller – Fits Mercury/MerCruiser 4.3L, 5.0L, 5.7L, 7.4L, 8.2L (Replaces 47-59362T1) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Impeller – Fits Mercury/MerCruiser 4.3L, 5.0L, 5.7L, 7.4L, 8.2L (Replaces 47-59362T1) is designed for Mercury MerCruiser inboard and sterndrive engines with engine-mounted sea water pumps. It is specifically compatible with V6/V8 engines including the 4.3L, 5.0L, 5.7L, 7.4L, and 8.2L models manufactured from 1998–2003 that feature a one-piece pump housing and a serpentine belt.
This component is a direct replacement for multiple OEM and aftermarket part numbers, including Mercury/MerCruiser 47-59362T1, Sierra 18-3087, and Mallory 9-45375, ensuring broad interchangeability.
- Installs in engine-mounted sea water pumps.
- Constructed from durable neoprene with a brass core for corrosion resistance.
- Engineered for systems using a one-piece pump housing and serpentine belt.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury/MerCruiser | 47-59362T1 |
| Mercury/MerCruiser | 47-59362T6 |
| Mercury/MerCruiser | 47-59362 |
| Mercury/MerCruiser | 47-593621 |
| Mercury/MerCruiser | 47-59362A1 |
| Sierra | 18-3087 |
| Mallory | 9-45375 |
| Mallory | 9-45375-10 |
| GLM | 89740 |
| Jabsco | 17954-0001-P |
| Pro Marine | 64362 |
| Redline | RL3087 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This impeller is designed for a wide range of MerCruiser sterndrive, inboard (MIE), and Ski engines, as well as select Mercury Racing models. Please verify your engine's serial number against the notes provided.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| MerCruiser | 4.3L (GEN+) 2BBL GM 262 V-6 | - | 4-Stroke | 1998–2001 | 47-59362T1 | 0L010044 THRU 0M614999 |
| MerCruiser | 4.3L CARB ALPHA/BRAVO | - | 4-Stroke | Up to 2003 | 47-59362T1 | Through 1A063240 & Up |
| MerCruiser | 4.3L EFI (GEN+) TBI GM 262 V-6 | - | 4-Stroke | 1998–2001 | 47-59362T1 | 0L012009 THRU 0M322780 |
| MerCruiser | 4.3LH (GEN+) 4BBL GM 262 V-6 | - | 4-Stroke | 1998 | 47-59362T1 | 0L010044 THRU 0M614999 |
| MerCruiser | 5.0L 2BBL GM 305 V-8 | - | 4-Stroke | 1998–2001 | 47-59362T1 | 0L015751 THRU 0M599999 |
| MerCruiser | 5.0L CARB ALPHA/BRAVO | - | 4-Stroke | Up to 2003 | 47-59362T1 | Through 0W650000 & Up |
| MerCruiser | 5.0L EFI GM 305 V-8 | - | 4-Stroke | 1999–2001 | 47-59362T1 | 0L331631 THRU 0M299999 |
| MerCruiser | 5.7L 2BBL GM 350 V-8 | - | 4-Stroke | 1998–2001 | 47-59362T1 | 0L010037 THRU 0M599999 |
| MerCruiser | 5.7L CARB ALPHA/BRAVO | - | 4-Stroke | Up to 2003 | 47-59362T1 | Through 0W650000 & Up |
| MerCruiser | 5.7L CARB MIE | - | 4-Stroke | 1998–2003 | 47-59362T1 | 0L002003 THRU 0W690000 & Up |
| MerCruiser | 5.7L CARB SKI | - | 4-Stroke | Up to 2003 | 47-59362T1 | Through 0W694844 & Up |
| MerCruiser | 5.7L COMPETITION SKI (GEN+) GM 350 V-8 | - | 4-Stroke | 1998 | 47-59362T1 | 0L002005 THRU 0M316999 |
| MerCruiser | 5.7L EFI GM 350 V-8 | - | 4-Stroke | 1999–2001 | 47-59362T1 | 0L325977 THRU 0M299999 |
| MerCruiser | 350 MAG MPI ALPHA/BRAVO | - | 4-Stroke | Up to 2001 | 47-59362T1 | 0L331599 THRU 0M299999 |
| MerCruiser | 350 MAG MPI HORIZON MIE | - | 4-Stroke | Up to 2001 | 47-59362T1 | 0L302200 THRU 0M299999 |
| MerCruiser | 350 MAG MPI MIE | - | 4-Stroke | Up to 2001 | 47-59362T1 | 0L302200 THRU 0M299999 |
| MerCruiser | 454 MAG MPI BRAVO (GEN VI) GM 454 V-8 | - | 4-Stroke | 1998 | 47-59362T1 | 0L010029 THRU 0L058399 |
| MerCruiser | 454 MAG MPI BRAVO (GEN VI) GM 454 V-8 | - | 4-Stroke | Up to 2001 | 47-59362T1 | 0L085400 THRU 0M024999 |
| MerCruiser | 454 MAG MPI HORIZON (GEN VI) GM 454 V-8 | - | 4-Stroke | Up to 2000 | 47-59362T1 | 0L086050 THRU 0L674000 |
| MerCruiser | 500 (GEN+) GM 502 V-8 | - | 4-Stroke | 1999 | 47-59362T1 | 0L414639 THRU 0L601036 |
| MerCruiser | 500 Bulldog | - | 4-Stroke | 1999–2001 | 47-59362T1 | 0L414620 THRU 0M050281 |
| MerCruiser | 500 EFI | - | 4-Stroke | 1998–2001 | 47-59362T1 | Multiple serial ranges |
| MerCruiser | 502 MAG MPI BRAVO (GEN VI) GM 502 V-8 | - | 4-Stroke | 1998 | 47-59362T1 | 0L017000 THRU 0L085432 |
| MerCruiser | 502 MAG MPI BRAVO (GEN VI) GM 502 V-8 | - | 4-Stroke | Up to 2001 | 47-59362T1 | 0L085433 THRU 0M024999 |
| MerCruiser | 7.4L BRAVO (MPI)(GEN VI) GM 454 V-8 | - | 4-Stroke | 1998–2000 | 47-59362T1 | 0L010003 THRU 0M024330 |
| MerCruiser | 7.4L MPI MIE (L29) GEN VI GM 454 V-8 | - | 4-Stroke | 1998–2000 | 47-59362T1 | 0L002006 THRU 0L674613 |
| MerCruiser | 8.2L MIE MPI (GEN VI) GM 502 V-8 | - | 4-Stroke | 1998–2000 | 47-59362T1 | 0L086013 THRU 0L674200 |
| MerCruiser | BLACK SCORPION 350 MAG SKI (GEN+) V-8 | - | 4-Stroke | 1997–2001 | 47-59362T1 | 0K040001 THRU 0M391599 |
| MerCruiser | BLACK SCORPION MX 6.2L SKI (GEN+) V-8 | - | 4-Stroke | 2001–2002 | 47-59362T1 | 0L670015 THRU 0M391599 |
| MerCruiser | MX 6.2L MPI BRAVO | - | 4-Stroke | Up to 2001 | 47-59362T1 | 0L680003 THRU 0M299999 |
| MerCruiser | MX 6.2L MPI MIE | - | 4-Stroke | Up to 2001 | 47-59362T1 | 0L302200 THRU 0M299999 |
| Mercury Racing | 525 EFI | - | 4-Stroke | Up to 2013 | 47-59362T1 | 0M900146 THRU 0M962885 & Up |
| Mercury Racing | 565 EFI | - | 4-Stroke | 2013 & Up | 47-59362T1 | 0M967821 & Up |
| Mercury Racing | 575 SCi | - | 4-Stroke | 1999–2001 | 47-59362T1 | Multiple serial ranges |
| Mercury Racing | 600 SCi | - | 4-Stroke | Up to 2013 | 47-59362T1 | 0M952908 THRU 0M962885 & Up |
| Mercury Racing | 662 SCi | - | 4-Stroke | Up to 2013 | 47-59362T1 | 0M956580 THRU 0M962885 & Up |
| Mercury Racing | 700 SCi | - | 4-Stroke | Up to 2013 | 47-59362T1 | 0M954560 THRU 0M962885 & Up |
| Mercury Racing | 850 SCi | - | 4-Stroke | Up to 2013 | 47-59362T1 | Multiple serial ranges |
| Mercury Racing | 900 SC | - | 4-Stroke | 1997–1999 | 47-59362T1 | 0K000858 THRU 0L602069 |
| Mercury Racing | 900 SC Dry Sump | - | 4-Stroke | 2000 | 47-59362T1 | 0L306805 & Up |
| Mercury Racing | 1025SCi | - | 4-Stroke | 2013 & Up | 47-59362T1 | 0M962886 & Up |
| Mercury Racing | 1075 SCi | - | 4-Stroke | Up to 2013 | 47-59362T1 | Multiple serial ranges |
| Mercury Racing | 1100 QC4V | - | 4-Stroke | 2013 & Up | 47-59362T1 | 0M965965 & Up | Mercury Racing | 1200 SCi | - | 4-Stroke | Up to 2013 | 47-59362T1 | 0M956534 THRU 0M962885 & Up |
| Mercury Racing | 1350 QC4V | - | 4-Stroke | 2013 & Up | 47-59362T1 | 0M965309 & Up |
| Mercury Racing | 1650 QC4V | - | 4-Stroke | 2013 & Up | 47-59362T1 | 0M965309 & Up |
| Mercury Racing | Scorpion 377 Sterndrive | - | 4-Stroke | Up to 2001 | 47-59362T1 | 0L416146 THRU 0M907201 |
Technical Specs
- Product Type
- Water Pump Impeller
- Installation
- Engine-mounted sea water pump
- Housing Material
- Neoprene with brass core
- Housing Color
- Black
- Dimensions
- 70 mm (2.75 in) x 70 mm (2.75 in) x 51 mm (2.0 in)
- Weight
- 0.1 kg (0.23 lbs)
- Other Technical Attributes
- For use with one-piece pump housing and serpentine belt
What’s in the Box
- 1 x Impeller (47-59362T1)
Installation Notes
- Disconnect the battery and close the seacock to prevent water ingress.
- Locate the engine-mounted sea water pump assembly.
- Drain any remaining water from the pump by loosening the drain plug or hoses.
- Remove the serpentine belt from the pump pulley.
- Unscrew the pump housing cover to expose the impeller. Note the orientation of the old impeller blades.
- Remove the old impeller using needle-nose pliers or an impeller puller. Clean the housing interior.
- Lightly lubricate the new impeller and housing with a suitable marine lubricant (e.g., glycerin or dish soap).
- Install the new impeller with a twisting motion, ensuring the blades are oriented in the same direction as the old ones.
- Re-install the pump housing cover with a new gasket if required (not included).
- Re-attach the serpentine belt, open the seacock, and reconnect the battery.
- Start the engine and immediately check for proper water flow and leaks.
Troubleshooting & FAQ
How do I know if this impeller fits my engine?
Confirm your engine model, year, and serial number against the compatibility table provided. This impeller fits specific MerCruiser and Mercury Racing models from 1998–2003 with engine-mounted sea water pumps, one-piece housings, and serpentine belts.
What are the signs of a failing water pump impeller?
Common symptoms include the engine running hotter than normal or overheating, a weak or non-existent stream of water from the exhaust, and visible cracks, stiffness, or missing blades on the old impeller upon inspection.
What is a typical replacement interval?
For preventative maintenance, it is recommended to inspect your impeller annually and replace it every 1-2 years or every 100-200 hours of operation, whichever comes first. Usage in saltwater or silty/sandy conditions may require more frequent replacement.
Does this impeller come with a gasket or o-ring?
No, this package contains the impeller only, as listed in the "What's in the Box" section. Gaskets and o-rings should be purchased separately if needed for your specific pump housing.
Why is my engine overheating after installing the new impeller?
This could be due to several reasons: incorrect installation (e.g., blades bent in the wrong direction), residual broken blades from the old impeller blocking water passages, an airlock in the cooling system, or a faulty thermostat. Always ensure the housing is clean and the impeller is installed correctly.
Is this a genuine OEM part?
This listing is an aftermarket replacement (not OEM). It has been built to OEM-level specifications with comparable materials. Our parts are manufactured in an ISO 9002 facility and are batch-inspected for consistency and quality.
How quickly do you ship and what are the costs?
We ship worldwide quickly—typical transit time is 5–15 days. Standard shipping is free for most orders, with expedited options available at checkout where offered.
What is your warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. See our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part. If anything differs—even if your model appears on the compatibility list—do not purchase.
- This is an aftermarket replacement part, not an OEM component.
- Professional installation is highly recommended for safety and optimal performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world conditions.
- Fast Global Fulfillment — We offer free standard delivery to most regions, with typical transit times of 5–15 days.
- Manufacturer-Direct Value — By working directly with manufacturers, we provide fair pricing without compromising on materials or quality control.
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