Sierra 18-3203 Impeller Repair Kit, Replaces Johnson/Evinrude 379766

The Sierra 18-3203 Impeller Repair Kit is a direct replacement kit for Johnson/Evinrude outboard motors, engineered to restore proper water pump function and cooling flow. This kit is built to meet or exceed the quality of the original equipment part it replaces, giving boat owners a reliable way to service their outboard's water pump without sourcing individual components separately.

The kit contains a Sierra 18-3002 impeller (O.E. #375638), the wear item most responsible for water pump failure, in the quantity needed to complete a single repair. Sierra manufactures its parts to stand up to the demands of high-horsepower engines and the harsh marine environment, and supplies OEM engine manufacturers and boat builders with quality parts as part of its regular production. Installing this kit at recommended service intervals helps prevent overheating caused by a worn or cracked impeller.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3203
• Product Type: Impeller Repair Kit
• Replaces (OEM): 379766
• Kit Contents: Impeller 18-3002 (O.E. #375638), Qty 1
• Material: Metal
• Item Dimensions: 0.39 x 0.39 x 0.39 inches
• Weight: 0.16 pounds
• UPC: 030999315656
• Fitment: Johnson/Evinrude outboard motors

Fitment

• Johnson/Evinrude outboard motors

Replaces (OEM)

• 379766

Frequently Asked Questions

What does the Sierra 18-3203 Impeller Repair Kit include? The kit includes one Sierra 18-3002 impeller (O.E. #375638), the single component needed to service the water pump on compatible Johnson/Evinrude outboard motors.

What OEM part number does the Sierra 18-3203 replace? This kit replaces Johnson/Evinrude OEM part number 379766.

Will this kit fit any Johnson or Evinrude outboard? The Sierra 18-3203 is designed for Johnson/Evinrude outboard motors; buyers should confirm their engine's original part number matches 379766 before ordering, since fit is part-number specific.

Is the Sierra 18-3203 an OEM part or an aftermarket replacement? It is an aftermarket replacement kit manufactured by Sierra, built to meet or exceed the quality of the original 379766 equipment it replaces.

What material is the impeller in the 18-3203 kit made from? The impeller included in the Sierra 18-3203 kit is made of metal.

How much does the Sierra 18-3203 Impeller Repair Kit weigh? The kit weighs 0.16 pounds.

What are the dimensions of the Sierra 18-3203 kit components? The impeller included in the kit measures 0.39 x 0.39 x 0.39 inches.

How do I know if I need this impeller kit? A worn, cracked, or hardened impeller reduces water flow and can cause overheating; replacing it with the Sierra 18-3203 kit at recommended service intervals restores proper cooling on compatible Johnson/Evinrude outboards.

Does the Sierra 18-3203 kit include gaskets or housing parts? No, the kit contains only the impeller (Sierra 18-3002, O.E. #375638) needed for the repair; it does not include housing or gasket components.

What is the UPC for the Sierra 18-3203 Impeller Repair Kit? The UPC for the Sierra 18-3203 is 030999315656.

How many impellers come in the Sierra 18-3203 kit? The kit contains one impeller, part number 18-3002, in a quantity of 1.

Does Sierra stand behind the 18-3203 kit with a warranty? Yes, the Sierra 18-3203 Impeller Repair Kit is covered by Sierra's limited warranty.