Sierra 18-3391 Water Pump Kit with Housing - Replaces Evinrude/Johnson 395072

The Sierra 18-3391 Water Pump Kit with Housing is a complete outboard water pump rebuild kit designed for Evinrude and Johnson outboard applications. Rather than a single impeller, this kit supplies the full set of components needed to rebuild the pump assembly in one job, including the housing, impeller cup and plate assembly, O-ring, gaskets, grommet, impeller key, and mounting hardware. Sierra builds the kit to meet or exceed original equipment quality, so the rebuilt pump delivers the cooling flow the outboard was designed around.

Because it is packaged as a kit rather than a standalone impeller, the 18-3391 is suited to a full water pump service rather than a quick impeller-only swap, helping ensure worn housing and seal components are replaced at the same time as the impeller. It is built as a direct equivalent to Evinrude/Johnson OEM part number 395072, so it installs in place of the original pump kit without modification.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3391
• Product Type: Water Pump Kit with Housing
• Color: White
• Material: Rubber
• Fit Type: Universal Fit
• Weight: 1.08 pounds
• UPC: 030999621597
• Kit Contents: Housing, 18-3346 Cup and Plate Assembly (O.E. 435027), 18-2769 O-Ring (O.E. 332000)
• Replaces (OEM): 395072

Fitment

Built for Evinrude and Johnson outboard engines that use the OEM 395072 water pump kit; fit type is universal within that application.

Replaces (OEM)

• 395072

Frequently Asked Questions

What does the Sierra 18-3391 water pump kit include? The kit includes the water pump housing along with a cup and plate assembly (18-3346, O.E. 435027), an O-ring (18-2769, O.E. 332000), and the other gaskets and hardware needed to rebuild the pump.

Does the 18-3391 kit include the housing or just internal parts? Yes, the 18-3391 is a full kit that includes the water pump housing itself, not just the internal rebuild components.

Is Sierra 18-3391 the same as OEM part 395072? Yes, the 18-3391 is built as a direct equivalent to Evinrude/Johnson OEM part number 395072 and installs in its place.

What outboard brands is this water pump kit designed for? This kit is designed for Evinrude and Johnson outboard engines that use the 395072 water pump kit.

What color is the Sierra 18-3391 water pump kit? The kit is white.

What material is the water pump kit made from? The pump components in the 18-3391 kit are made of rubber.

How much does the 18-3391 water pump kit weigh? The Sierra 18-3391 weighs 1.08 pounds.

Is this a universal-fit kit or vehicle-specific? Sierra lists the 18-3391 as a universal fit kit for its applicable Evinrude/Johnson outboards.

Does the 18-3391 kit come with a new O-ring and gaskets? Yes, an 18-2769 O-ring (O.E. 332000) is included along with the other gaskets and hardware in the kit.

What is the UPC for the Sierra 18-3391 water pump kit? The UPC for the Sierra 18-3391 water pump kit is 030999621597.

Is the 18-3391 genuine Sierra or aftermarket? The 18-3391 is a genuine Sierra-branded water pump kit, built to meet or exceed original equipment quality as a replacement for OEM part 395072.