Sierra 18-3067 Impeller - Replaces 47-84797M - Mercury/Mariner and Yamaha Outboard

The Sierra 18-3067 Impeller is a replacement water pump impeller designed for use with Mercury/Mariner and Yamaha outboard engines. This part is sold as a single impeller per package and is built to meet or exceed the specifications of the original equipment part it replaces. The impeller is white in color and is a precision-fit component, so buyers should confirm part numbers against their engine before ordering to ensure proper fit.

The water pump impeller is a critical wear item in an outboard's cooling system, drawing raw water through the pump housing to cool the engine. Because impeller blades flex and wear with use, periodic replacement helps maintain proper cooling flow and can help prevent overheating. The Sierra 18-3067 is listed under Sierra's Yamaha Outboard Water Pumps and Impellers, 2 Stroke category, and replaces Mercury Marine part number 47-84797M.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3067
• Type: Impeller
• Color: White
• Weight: 0.04 pounds
• UPC: 030999315199
• Unit Count: 1 impeller per package
• Fits: Mercury/Mariner and Yamaha outboard engines
• Category: Yamaha Outboard Water Pumps and Impellers, 2 Stroke
• Replaces (OEM): 47-84797M

Fitment

Designed for use with Mercury/Mariner and Yamaha outboard engines.

Replaces (OEM)

• 47-84797M

Frequently Asked Questions

What engines does the Sierra 18-3067 impeller fit? The Sierra 18-3067 is designed for use with Mercury/Mariner and Yamaha outboard engines. Because fit is specific, buyers should check part numbers against their engine before ordering.

What OEM part number does the 18-3067 replace? It replaces Mercury Marine part number 47-84797M. Sierra part 18-3067 is built to meet or exceed the specifications of the original part it replaces.

How many impellers come in the package? One impeller is included per package of the Sierra 18-3067.

What color is the Sierra 18-3067 impeller? This impeller is white.

How much does the Sierra 18-3067 impeller weigh? The Sierra 18-3067 weighs 0.04 pounds.

Is the Sierra 18-3067 a genuine OEM part or an aftermarket replacement? The 18-3067 is a Sierra-brand replacement part, not an OEM Mercury or Yamaha part, though Sierra states it meets or exceeds the original equipment part it replaces.

What is the UPC for the Sierra 18-3067 impeller? The UPC for this impeller is 030999315199.

What category does the 18-3067 impeller fall under? Sierra lists the 18-3067 under Yamaha Outboard Water Pumps and Impellers, 2 Stroke.

Why does an outboard water pump impeller need to be replaced? An impeller's rubber blades flex and wear with use, and a worn impeller can reduce cooling flow. The Sierra 18-3067 is a replacement impeller intended to restore proper water pump function in compatible Mercury/Mariner and Yamaha outboards.

How do I know if the 18-3067 is the correct impeller for my engine? Because fit is engine specific, confirm your engine's original part number matches 47-84797M or cross-reference your existing impeller before ordering the Sierra 18-3067.