UANOFCN
0 ratings
70941A3 Water Pump Impeller Kit for Mercury Marine Outboard Lower Units 4HP 4.5HP 7.5HP 9.8HP Sierra 18-3446
genuine image
70941A3 Water Pump Impeller Kit for Mercury Marine Outboard Lower Units 4HP 4.5HP 7.5HP 9.8HP Sierra 18-3446
Water Pump Impeller Kit for Mercury Mariner Outboards with 2-stroke engines. Includes all necessary components for installation. Compatible with 4, 4.5, 7.5, and 9.8 HP models.
70941A3 Water Pump Impeller Kit for Mercury Marine Outboard Lower Units 4HP 4.5HP 7.5HP 9.8HP Sierra 18-3446
Item #: 50942614

70941A3 Water Pump Impeller Kit for Mercury Marine Outboard Lower Units 4HP 4.5HP 7.5HP 9.8HP Sierra 18-3446

Item #: 50942614

ZMW 1040

Price Details

Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )

*All items will import from US

0 ratings Write a review
In stock
us Imported from USA store
Order now and get it around Sunday, July 19
Secured transactionsecured transaction

Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.

Our Top Logistics Partners
  • fedex
  • dhl
Water Pump Impeller Kit for Mercury Mariner Outboards with 2-stroke engines. Includes all necessary components for installation. Compatible with 4, 4.5, 7.5, and 9.8 HP models.
U-Care Warranty:
None
Select a Plan
fast shipping

Fast
Shipping

free return

Free
Return*

secure packaging

Secure Packaging

100% original products

100% Original Products

pci-dss

PCI DSS Compliance

iso certified

ISO 27001 Certified

paypal payment
visa payment
mastercard payment
mobile money payment
Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.

What Stands Out

Compatibility
Designed specifically for Mercury Marine Outboard lower units of various horsepower ratings, ensuring a perfect fit and reliable performance across multiple models.
Durable Material
Constructed with high-quality materials to withstand harsh marine environments, enhancing longevity and reducing maintenance costs for outboard users.
Easy Installation
Sierra's user-friendly design allows for quick and straightforward installation, enabling boat owners to efficiently replace their impeller without requiring professional help.

Product Details

Shop online for Replace 46-70941A3 Sierra 18-3446 Water Pump kit for Mercury Mercruiser 4HP, 4.5HP, 7.5HP, and 9.8HP at Ubuy Zambia. Get the best deals and fast shipping!
Brand NameUANOFCN
Model Number46-70941A3, 46-46893A6
Manufacturer Part Number46-70941A3, 46-46893A6
ManufacturerUANOFCN
UPC636946578831
Item Type NameOutboard Motor and Drives Lower Unit Cooling
Included Components1x Cover Assembly (93224A1), 1x Housing Assembly (46-70941A1, 46-70941T01), 1x Impeller (47-89981), 1x Impeller Plate (46895), 1x Seal Water Pump Cover (26-36558)
Part Interchange InfoAftermarket Sierra 18-3446, GLM 12122
Compatible with Vehicle TypeBoat, for Mercury Marine Outboard 4hp 4.5hp 6hp 7.5hp 9.8hp
OEM Equivalent Part Numberfor Mercury Marine 46-46893A6, for Mercury Marine 46-70941A3
Automotive Fit TypeVehicle Specific Fit
Material TypeNeoprene Marine Rubber Impeller and O-Ring, Nylon PA66 Plastic Water Pump Housing, Stainless Steel
Item Weight3 Ounces (85.05 grams)
Weight ClassLight Weight
BrandUANOFCN
MaterialNeoprene Marine Rubber Impeller and O-Ring, Nylon PA66 Plastic Water Pump Housing, Stainless Steel
Vehicle Service TypeBoat, for Mercury Marine Outboard 4hp 4.5hp 6hp 7.5hp 9.8hp
OEM Part Numberfor Mercury Marine 46-46893A6, for Mercury Marine 46-70941A3
Number of Items1

Who Should Buy?

Suitable For
  • Small Boat Owners

    Ideal for small boat owners with Mercury outboards needing reliable cooling system components for engines up to 9.8HP.

  • DIY Enthusiasts

    Perfect for DIY enthusiasts who prefer to service their boats at home, offering an easy installation experience.

  • Replacement Needs

    Great for users needing a replacement impeller kit to ensure optimal engine performance and prevent overheating issues.

Not Suitable For
  • High-Powered Boats

    Not suitable for high-powered boat engines, as this kit is specifically designed for smaller horsepower requirements only.

  • Professional Mechanics

    May not meet the specifications required by professional marine mechanics who demand OEM quality for demanding repairs.

  • Larger Outboards

    Inappropriate for users with larger outboard engines above 9.8HP, as this kit is not compatible with higher capacities.

Product Description

70941A3 Water Pump Impeller Kit for Mercury Marine Outboard Lower Units 4HP 4.5HP 7.5HP 9.8HP Sierra 18-3446

Have any Query? Chat with us

Customer Questions & Answers

  • Question: What is included in the 70941A3 Water Pump Impeller Kit?

    Answer: The 70941A3 Water Pump Impeller Kit includes a high-quality impeller designed specifically for replacing the existing unit in Mercury, Mariner, and Force Outboard Lower Units. This kit typically contains the impeller itself, gaskets, and relevant hardware needed for installation. These components are essential to ensure that your outboard motor maintains optimal cooling and efficiency. Upgrading this kit can enhance your motor's performance, especially during long outings when effective cooling is critical.
  • Question: What outboard motors are compatible with the 70941A3 kit?

    Answer: The 70941A3 Water Pump Impeller Kit is compatible with a range of outboard motors, specifically those with power ratings of 4HP, 4.5HP, 7.5HP, and 9.8HP, including models from Mercury, Mariner, and Force. Ensuring compatibility is vital to achieving the best operational efficiency, as mismatched parts may lead to overheating and performance issues. By using a kit designed for these specific models, you can expect reliable cooling during operation, especially while navigating warmer waters.
  • Question: How often should I replace the water pump impeller?

    Answer: It is generally recommended to replace the water pump impeller every 2 to 3 years or after a certain number of operational hours, depending on usage factors such as saltwater or freshwater environments and motor load. Regular inspections are crucial; if you notice any signs of wear, it’s best to replace the impeller. Regular replacement ensures your outboard motor avoids overheating, especially during extended use at higher RPMs. Keeping your water pump in optimal condition results in better performance and prolonged lifespan of your motor.
  • Question: What are the signs that my water pump impeller needs to be replaced?

    Answer: Common signs that your water pump impeller needs replacement include inconsistent water flow from the cooling outlets, an increase in engine temperature, or unusual noises coming from the water pump. If you notice a reduction in water pressure during operation or see overheating indicators on your outboard motor, these may also suggest a failing impeller. Being proactive in identifying these symptoms and replacing the impeller can protect your outboard from overheating and subsequent damage, ensuring reliable navigation during your outings.
  • Question: Can I install the 70941A3 kit myself?

    Answer: Yes, you can install the 70941A3 Water Pump Impeller Kit yourself if you have basic mechanical skills and tools. The process typically involves removing the lower unit and replacing the old impeller with the new one, following instructions from the service manual for your specific engine model. This do-it-yourself approach can save time and money, and gives you the satisfaction of maintaining your own equipment. However, if you're unsure, consulting a professional mechanic is advisable to ensure proper installation and avoid any potential damage.
  • Question: Why choose the Sierra 18-3446 as a replacement part?

    Answer: The Sierra 18-3446 is a trusted replacement part known for its high-quality materials and reliable performance. It is designed to meet or exceed OEM specifications, ensuring compatibility and efficiency for your outboard motor. Choosing Sierra means you are selecting a part that often exhibits superior durability compared to generic alternatives, which can lead to increased performance and longevity. With a quality impeller, you can enjoy smoother rides and reassurance that your outboard motor is working effectively.
  • Question: What maintenance should I perform after installing a new impeller?

    Answer: After installing a new impeller, monitor your motor’s cooling system performance by checking the water output regularly. Also, ensure the system is free of debris, and consider flushing the cooling system with fresh water after use, especially in saltwater conditions. Regular checks of the lubricant levels in the lower unit are also important to ensure everything is functioning properly. Proactively maintaining other components can prevent wear and extend the overall life of your outboard.
  • Question: How does the impeller work in my outboard motor?

    Answer: The impeller works by creating a flow of water through the cooling system of your outboard motor. As the engine runs, the impeller rotates, drawing in water from the surrounding source and pushing it through the cooling passages to maintain an optimal temperature. Proper function of the impeller is crucial, as it helps prevent overheating, which can lead to severe engine damage. Ensuring regular maintenance of the impeller can protect your engine and improve efficiency, maximizing your boating experience.
  • Question: Where can I buy the 70941A3 Water Pump Impeller Kit in Zambia?

    Answer: You can buy the 70941A3 Water Pump Impeller Kit from Ubuy in Zambia. Ubuy offers a wide selection of marine parts and accessories, including this specific kit. Their platform ensures that you can find the right parts for your outboard motor easily, with detailed product descriptions and customer reviews to guide your purchase decision. Shopping from Ubuy allows you to have confidence in the quality and compatibility of the parts you order.
  • Question: What should I do if I experience overheating after installing a new impeller?

    Answer: If you experience overheating after installing a new impeller, first check that the impeller was installed correctly and all connections are secure. Ensure there are no blockages in the cooling system, such as debris, that may be restricting water flow. Additionally, verify that the impeller is the correct model for your motor. If issues persist, consult a professional technician who can diagnose and resolve more complex problems within the cooling system to prevent further damage to your engine.

UANOFCN Water Pumps 46-70941A3, 46-46893A6 Editorial Review

The Replace 46-70941A3 Sierra 18-3446 Water Pump kit MercuryMercruiser is a highly rated product that is a perfect fit for various outboard motors. Customers have raved about the quality and durability of the product, saying that it is well made and not cheap. The water pump kit is easy to install in older outboard motors and comes with all the necessary parts. Customers have also expressed that it works great and should be changed every 2-3 years for low use fresh water engines and annually for saltwater or high use engines. Overall, this product is highly recommended for anyone looking to replace their old worn water pump in their outboard motor.

Customer Reviews & Ratings

5.0
1 customers ratings
  • 5 Star
    100%
  • 4 Star
    0%
  • 3 Star
    0%
  • 2 Star
    0%
  • 1 Star
    0%

Review this product

Share your thoughts with other customers

Pros

  • Fit perfectly
  • Well-made
  • Easy to install
  • Comes with all necessary parts
  • Works great
  • Durable

Platform Trust & Buyer Confidence

trustpilot logo
4.3/5 9,000 + reviews
Read reviews
MT
Mohd
Verified buyer

“The product received very good packaging & safe…Thank You”

16 June 2026 · via Trustpilot
SJ
Shawati
Verified buyer

“Accurate delivery timing given”

16 June 2026 · via Trustpilot
YB
Youcef
Verified buyer

“Not madly expensive like I thought, and much quicker than promised.”

15 June 2026 · via Trustpilot
LM
Leila
Verified buyer

“Never dealt with Ubuy before, but everything worked out great. Seamless cross border purchasing and shipping. Thanks!”

6/7/2026 · via Trustpilot
KA
Kwame
Verified buyer

“The process was smooth, with clear communication and timelines. This was my 1st purchase and I am really impressed. I will definitely be coming back.”

12 June 2026 · via Trustpilot
Secure Checkout Global Delivery Easy Returns Genuine Products

Product Price History

Important information

  • Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
  • Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.

ZMW 1040

Order now and get it around Sunday, July 19

QTY:

Secured transactionsecured transaction

PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.

Our Top Logistics Partners
  • fedex
  • dhl
Fastest cross-border delivery

Ubuy Assurance

Experience worry-free shopping with 100% original products, PCI DSS-compliant payment security, ISO 27001-certified data protection, the fastest cross-border delivery, free returns *, and secure packaging on every order.