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Sierra 18-3422 Marine Water Pump Base for Mercury/Mariner Outboard Motors

Manufacturer

Picture for manufacturer Sierra

Part Number

18-3422
11 reviews
Sale Price

$35.91

1 left at this price

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Usually delivered within 2 days

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Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 18-3422 is a direct-replacement water pump base designed for Mercury and Mariner outboard motors. Engineered to meet or exceed OEM specifications, this replacement base provides the structural foundation for the outboard's raw water cooling system, ensuring reliable pump alignment and sealing for consistent engine temperature management.

Sierra International is a leading supplier of marine engine components, and this water pump base is built to the same tolerances as the original Mercury Marine part it replaces. It is a direct drop-in replacement that simplifies routine water pump service and rebuilds.

Key Features:

  • Meets or exceeds original equipment manufacturer (OEM) specifications
  • Direct replacement for Mercury Marine OEM part number 46-77516A1
  • Also replaces Mercury Marine part numbers: 46-73842A2, 46-68390A1, 46-65498A1, and 46-48745A1
  • Interchangeable with GLM 12380 and Mallory 9-43302
  • Backed by Sierra's industry-leading warranty

OEM Cross-Reference Numbers: Mercury 46-77516A1, 46-73842A2, 46-68390A1, 46-65498A1, 46-48745A1 | GLM 12380 | Mallory 9-43302

My only complaint is that the site couldn't identify the size wheel center caps I needed by vehicle type. I had to measure the center hole on my wheels, lucky I'm a tool junky.

Best price I could find, and free shipping. ..I am hoping to get the tank soon

Very easy

Was NICE AND EASY TO FIND IT.

I was hesitant to order from Autoplicity due to the perception that the price was too good to be real (and not some scam). However, I read a few reviews on the internet and decided to take a chance. Once I placed my order I was sent a tracking number and received my car parts within 2 weeks. I was happy that I got the parts I ordered and the price was really low. Simple and quick.

Name brand product was sold to me at a fraction of the local retailer's price. I will share with all my friends the value at this site!

Easy thanks!

I thought there was a 5% off by signing up at the beginning. It went away and I didn't get it. I may be wrong.

Excellent! Order some spark plugs from here and they got here in 3 days! Wow!

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Great business to deal with! Notifies location an status of orders timely and efficiently

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