Sierra 18-3380 Water Pump Kit Without Housing - Fits Evinrude/Johnson 50, 55, 60 HP 1979-85 (Replaces OMC 390770)

The Sierra 18-3380 Water Pump Kit Without Housing is a complete rebuild kit for the water pump on select Evinrude/Johnson outboards, supplying the wear components that fail first as an impeller ages and the pump loses its cooling flow. The kit includes an 18-2705 oil seal, 18-2709 wear plate gasket, 18-3055 impeller, 18-3136 bolt, 18-3337 grommet, 18-3343 wear plate, 18-3365 bolt, and 18-7134 O-ring, giving an installer everything needed to renew the pump's sealing and impeller surfaces in one job. Because it is supplied without the pump housing, it is intended for pumps where the housing itself is still serviceable and only the wear parts need replacing.

This kit fits 50 HP (1979-85), 55 HP (1979-85), and 60 HP (1980-85) Evinrude/Johnson outboards. It is built to be interchangeable with GLM 12211 and Evinrude/Johnson 0390770 and 0439077, and is an equivalent for OMC 390770, so it can be used as a direct replacement during a routine water pump service or impeller change.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3380
• Product Type: Water Pump Kit, without housing
• Weight: 0.73 pounds
• Color: White
• Kit Contents: 18-2705 Oil Seal, 18-2709 Wear Plate Gasket, 18-3055 Impeller, 18-3136 Bolt, 18-3337 Grommet, 18-3343 Wear Plate, 18-3365 Bolt, 18-7134 O-Ring
• Number of Items: 1
• UPC: 030999753571

Fitment

• Evinrude/Johnson 50 HP, 1979-85
• Evinrude/Johnson 55 HP, 1979-85
• Evinrude/Johnson 60 HP, 1980-85

Replaces (OEM)

• GLM 12211
• Evinrude/Johnson 0390770
• Evinrude/Johnson 0439077
• OMC 390770

Frequently Asked Questions

What does the Sierra 18-3380 water pump kit include? It includes an 18-2705 oil seal, 18-2709 wear plate gasket, 18-3055 impeller, 18-3136 bolt, 18-3337 grommet, 18-3343 wear plate, 18-3365 bolt, and 18-7134 O-ring, one of each, for a single pump rebuild.

Does the Sierra 18-3380 come with a pump housing? No, the 18-3380 is the kit version without housing, so the existing pump housing on the outboard is reused and only the wear parts and gasket set are replaced.

Which outboards does the Sierra 18-3380 fit? It fits Evinrude/Johnson 50 HP models from 1979-85, 55 HP models from 1979-85, and 60 HP models from 1980-85.

Is the 18-3380 an OEM Evinrude/Johnson part? It is an aftermarket kit built to be interchangeable with OMC 390770 and Evinrude/Johnson part numbers 0390770 and 0439077, as well as GLM 12211.

What is the weight of the Sierra 18-3380 kit? The Sierra 18-3380 Water Pump Kit Without Housing weighs 0.73 pounds.

How many impellers are in the 18-3380 kit? One 18-3055 impeller is included in the 18-3380 kit, along with the wear plate, gasket, seal, grommet, O-ring, and two bolts needed for the rebuild.

Can the 18-3380 be used on a 60 HP Evinrude/Johnson from the mid-1980s? Yes, the 18-3380 kit covers 60 HP Evinrude/Johnson outboards for model years 1980-85.

What is the UPC for the Sierra 18-3380 kit? The UPC for the Sierra 18-3380 Water Pump Kit Without Housing is 030999753571.

Is the 18-3380 the right kit if I also need a new pump housing? No, the 18-3380 does not include a housing; a kit with housing is a separate part number for outboards where the housing itself needs replacement.

What color are the components in the 18-3380 kit? The Sierra 18-3380 Water Pump Kit Without Housing is finished in white.