Sierra 18-3390 Water Pump Repair Kit without Housing for Evinrude/Johnson 140-175 HP Outboards

The Sierra 18-3390 is a water pump repair kit without housing, built to restore cooling system performance on qualifying Evinrude/Johnson outboard motors. This kit contains the internal wear components of the water pump assembly, allowing you to rebuild the pump using your existing housing rather than replacing the entire unit. Each part in the kit is constructed with precision and is designed to meet or exceed the quality of the original equipment part it replaces.

The 18-3390 is intended for outboards where the water pump housing is still serviceable and only the internal components -- such as the impeller, plate, and cup -- need renewal. Sierra also offers a version of this kit with housing included (part number 18-3392) and a standalone housing kit (18-3391) for boaters whose housing is worn or damaged, so the correct part can be selected based on the condition of the existing pump housing.

This kit fits a range of Evinrude/Johnson outboard motors spanning 140 HP, 150 HP, and 175 HP, across multiple production years and shaft-length configurations, including SL, EL, and DI variants. Refer to the Fitment section below to confirm compatibility with your specific outboard before ordering.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3390
• Product Type: Water Pump Kit (without Housing)
• OEM Part Number: OMC 395060
• UPC: 030999621580
• Weight: 1.3 pounds
• Included Components: Water Pump Kit
• Number of Items: 1
• Vehicle Service Type: Boat
• Housing Included: No

Fitment

• Evinrude/Johnson 140 HP, 1979-Up
• Evinrude/Johnson 140 HP, 25 inch shaft, 1993
• Evinrude/Johnson 140 HP, 25 inch shaft, 1994-2000
• Evinrude/Johnson 150 HP, 1979-Up
• Evinrude/Johnson 150 HP, 20 inch shaft, 1993 & Up
• Evinrude/Johnson 150 SL HP, 20 inch shaft, 1994-98
• Evinrude/Johnson 150 EL HP, 20 inch shaft, 1996-98
• Evinrude/Johnson 150 HP, 25 inch shaft, 1993 & Up
• Evinrude/Johnson 150 DI HP, 1997 & Up
• Evinrude/Johnson 150 HP, 2000 & Up
• Evinrude/Johnson 175 SL HP, 20 inch shaft, 1994-98
• Evinrude/Johnson 175 EL HP, 20 inch shaft, 1996-98
• Evinrude/Johnson 175 HP, 25 inch shaft, 1993 & Up

Replaces (OEM)

• GLM 12104
• Evinrude/Johnson 0395060
• 0435447
• 0434421
• 5001594
• Mallory 9-48210
• OMC 395060

Frequently Asked Questions

What outboards does the Sierra 18-3390 water pump kit fit? The 18-3390 fits Evinrude/Johnson outboards including 140 HP (1979-Up and 25 inch shaft 1993-2000), 150 HP (1979-Up, 20 inch and 25 inch shaft 1993 & Up, SL and EL 20 inch shaft 1994-98, DI 1997 & Up, and 2000 & Up), and 175 HP (SL and EL 20 inch shaft 1994-98, and 25 inch shaft 1993 & Up).

Does this kit include the water pump housing? No, part number 18-3390 is the water pump kit without housing. If your housing needs replacement, Sierra offers the same internal kit with housing included under part number 18-3392, or a standalone housing kit under part number 18-3391.

What OEM part numbers does the Sierra 18-3390 replace? The 18-3390 is interchangeable with GLM 12104, Evinrude/Johnson 0395060, 0435447, 0434421, and 5001594, Mallory 9-48210, and OMC 395060.

How much does the 18-3390 water pump kit weigh? The Sierra 18-3390 water pump kit weighs 1.3 pounds.

Is the Sierra 18-3390 a genuine OEM part or aftermarket? The 18-3390 is a Sierra-manufactured aftermarket replacement kit, built to meet or exceed the quality of the original equipment parts it replaces on qualifying Evinrude/Johnson outboards.

How many of these kits come in one package? One Sierra 18-3390 water pump kit is included per package, containing the water pump kit components without housing.

Will the 18-3390 fit a 150 HP Evinrude with a 20 inch shaft from 1993? Yes, the 18-3390 water pump kit fits Evinrude/Johnson 150 HP outboards with a 20 inch shaft for 1993 & Up.

What is the difference between the 18-3390 and the 18-3392 kits? The 18-3390 is the water pump kit without housing, while the 18-3392 is the same style kit that includes the housing, for the same range of Evinrude/Johnson 140-175 HP applications.

Does the 18-3390 fit a 175 HP outboard from 1976-78? No, the 1976-78 model years for 150 and 175 HP Evinrude/Johnson outboards use a different repair kit (18-3393), not the 18-3390.

What is the UPC for the Sierra 18-3390 water pump kit? The UPC for the Sierra 18-3390 water pump kit is 030999621580.

Does the 18-3390 fit the 150 DI outboard? Yes, the Sierra 18-3390 water pump kit fits Evinrude/Johnson 150 DI outboards for 1997 & Up.

Is a separate housing kit available if mine is worn out? Yes, Sierra part number 18-3391 is the standalone housing kit that pairs with the 18-3390 water pump internals if the existing housing needs replacement.