Sierra 18-3056 Water Pump Impeller for MerCruiser Alpha One Generation II and Vazer, S/N 0D494569 and Above

The Sierra 18-3056 is a replacement water pump impeller built for the MerCruiser Alpha One Generation II and Vazer sterndrive water pump assembly, covering units with serial number 0D494569 and above. The impeller is the wear component inside the drive's water pump that circulates raw water through the cooling system, and it is one of the parts most commonly replaced during routine water pump service or when cooling flow drops off. Each unit is sold individually as a single impeller for use in the Generation II / MR Alpha water pump assembly.

Sierra cross-references this impeller to OEM numbers from Chrysler Force, Honda, and Mercury Marine, making it a straightforward equivalent when you know your engine's original part number but want a Sierra-branded replacement. Confirm your drive's serial number against the 0D494569-and-above range before ordering, since earlier Alpha One serial ranges use different Sierra impeller part numbers.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3056
• Product Type: Water Pump Impeller
• Fitment: MerCruiser Alpha One Generation II and Vazer, serial number 0D494569 and above
• OEM Cross Reference: Chrysler Force 47-43026-2, Honda 19210-ZW1-003, Mercury Marine 47-43026-T2
• Weight: 0.13 pounds
• UPC: 030999315120
• Quantity: 1 impeller

Fitment

• MerCruiser Alpha One Generation II and Vazer, serial number 0D494569 and above

Replaces (OEM)

• Chrysler Force 47-43026-2
• Honda 19210-ZW1-003
• Mercury Marine 47-43026-T2

Frequently Asked Questions

What does the Sierra 18-3056 impeller fit? It is built for the MerCruiser Alpha One Generation II and Vazer water pump assembly, specifically units with serial number 0D494569 and above.

Will 18-3056 work on an earlier Alpha One serial number? No. The 18-3056 impeller is designated for serial number 0D494569 and above; earlier Alpha One serial ranges use different Sierra part numbers within the same water pump family.

What OEM part numbers does the Sierra 18-3056 cross-reference? It cross-references Chrysler Force 47-43026-2, Honda 19210-ZW1-003, and Mercury Marine 47-43026-T2.

How much does this impeller weigh? The Sierra 18-3056 impeller weighs 0.13 pounds.

How many impellers come in the package? One 18-3056 impeller is included per package.

Is the Sierra 18-3056 an OEM or aftermarket part? It is a Sierra-branded aftermarket replacement, cross-referenced to equivalent OEM numbers from Chrysler Force, Honda, and Mercury Marine.

What is the UPC for the Sierra 18-3056 impeller? The UPC for the Sierra 18-3056 impeller is 030999315120.

Is 18-3056 part of a larger water pump kit? The 18-3056 impeller is a component used in the Generation II / MR Alpha water pump assembly on MerCruiser Alpha One Generation II and Vazer drives.

How do I know if my drive uses the 0D494569-and-above serial range? Check the serial number stamped on your MerCruiser Alpha One Generation II or Vazer drive; the 18-3056 impeller applies only to units serial number 0D494569 and above.

Can I use the Chrysler Force or Honda OEM number to confirm this is the right part? Yes, if your original impeller is marked Chrysler Force 47-43026-2, Honda 19210-ZW1-003, or Mercury Marine 47-43026-T2, the Sierra 18-3056 is the cross-referenced equivalent.