Sierra 18-3201 Impeller Repair Kit, Replaces 379763, for Johnson/Evinrude Outboard Motors

The Sierra 18-3201 Impeller Repair Kit is a water pump service kit built to replace the original equipment part 379763 on Johnson/Evinrude outboard motors. Losing water pump capacity is one of the most common causes of overheating in an outboard, and this kit gives you the components needed to restore proper cooling flow during a water pump rebuild. At the core of the kit is a Sierra impeller, part number 18-3001, which itself carries the O.E. Cross-reference numbers 277181 and 434424, so it directly replaces those factory impellers as well.

The kit is built from plastic components and is designed to meet or exceed the quality of the original equipment part it replaces. It ships as a single-piece kit (one unit count) intended for a single water pump service job, making it a straightforward, fit-specific purchase for owners who already know their pump housing accepts the 379763 replacement part. Because water pump impellers wear from heat and friction and can fail without warning, keeping a kit like this on hand or installing it proactively is a practical way to protect the engine's cooling system before a breakdown happens on the water.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3201
• Replaces (OEM): 379763
• Included Impeller Part Number: 18-3001
• Impeller OEM Cross-Reference Numbers: 277181, 434424
• Material: Plastic
• Color: White
• Weight: 0.14 pounds
• Unit Count: 1

Fitment

• Johnson/Evinrude outboard motors

Replaces (OEM)

• 379763

Frequently Asked Questions

What does the Sierra 18-3201 Impeller Repair Kit replace? This kit replaces OEM part number 379763 on Johnson/Evinrude outboard motors, giving you a direct service part when that original number is no longer available from the factory.

What is included in the box with part 18-3201? The kit contains a Sierra impeller, part number 18-3001, which carries the O.E. Cross-reference numbers 277181 and 434424, sold as a single unit count intended for one water pump service.

Is the impeller in the 18-3201 kit made of rubber or plastic? The kit's components are made of plastic, as listed in the product specifications for the Sierra 18-3201 Impeller Repair Kit.

What color are the parts in this kit? The components in the Sierra 18-3201 kit are white.

How much does the Sierra 18-3201 Impeller Repair Kit weigh? It weighs 0.14 pounds.

Will the 18-3001 impeller inside this kit also fit as a standalone replacement for O.E. Numbers 277181 or 434424? Yes, the impeller included in the 18-3201 kit, part number 18-3001, is cross-referenced to O.E. Numbers 277181 and 434424.

Does the Sierra 18-3201 kit meet original equipment quality? Sierra states this product meets or exceeds the original equipment quality of the part it replaces, in this case OEM 379763.

How many units come in one order of part 18-3201? One order of the Sierra 18-3201 Impeller Repair Kit contains a unit count of 1, intended for a single water pump service job.

What motors is the Sierra 18-3201 Impeller Repair Kit designed for? This kit is designed for Johnson/Evinrude outboard motors that use the OEM 379763 impeller kit.

Is this a genuine Sierra part or an aftermarket copy? The 18-3201 kit is a genuine Sierra-branded product, manufactured to meet or exceed the quality of the original Johnson/Evinrude 379763 part it replaces.