Engineered Marine Products Water Pump Impeller 47-01814, Replaces 18-3056, for MerCruiser Alpha One Generation II & Vazer

The Engineered Marine Products 47-01814 is a water pump impeller built for the cooling system of MerCruiser Alpha One Generation II and Vazer sterndrives, covering units with serial number 0D494569 and above. The impeller is the wear component inside the water pump assembly that circulates raw water through the engine's cooling system, and it is the part most commonly replaced during routine water pump service or when overheating or reduced water flow is observed.

This part is manufactured to match OEM specifications and is a direct equivalent to part number 18-3056, allowing it to be installed in place of that number without modification. Engineered Marine Products has supplied both OEM and marine aftermarket channels for over 40 years, engineering and sourcing components to meet original equipment standards.

Because water pump impellers are model- and serial-range specific on MerCruiser drives, confirm your unit's serial number falls within the 0D494569-and-above range for Alpha One Generation II and Vazer applications before ordering, since earlier serial ranges and other drive types (MR/Alpha I, Bravo) use different impeller part numbers.

Specifications

• Brand: Engineered Marine Products
• Manufacturer Part Number: 47-01814
• OEM Cross Reference: 18-3056
• Product Dimensions: 8 x 5 x 0.5 inches
• Weight: 0.157 pounds
• Finish: Machined
• UPC: 840080473048
• Fitment: MerCruiser Alpha One Generation II and Vazer, serial number 0D494569 and above

Fitment

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

Replaces (OEM)

• 18-3056

Frequently Asked Questions

What does part number 47-01814 fit? Part number 47-01814 is a water pump impeller for MerCruiser Alpha One Generation II and Vazer sterndrives with serial number 0D494569 and above.

Is 47-01814 the same as OEM part 18-3056? Yes, the Engineered Marine Products 47-01814 impeller is a direct equivalent to OEM part number 18-3056 and can be installed in its place.

How much does this impeller weigh? The 47-01814 water pump impeller weighs 0.157 pounds.

What are the dimensions of the 47-01814 impeller? The 47-01814 impeller measures 8 x 5 x 0.5 inches.

Will this impeller fit an Alpha I water pump from an earlier serial range? No, 47-01814 is designated for serial number 0D494569 and above on Alpha One Generation II and Vazer drives; earlier MR/Alpha I serial ranges use different impeller part numbers.

Does this part fit Bravo sterndrives? No, 47-01814 is specified for Alpha One Generation II and Vazer applications, not Bravo drives, which use separate impeller part numbers.

What finish does the 47-01814 impeller have? The 47-01814 impeller has a machined finish.

Is this a genuine or aftermarket impeller? The 47-01814 is manufactured by Engineered Marine Products to OEM specifications as an aftermarket equivalent to OEM part 18-3056.

When should the 47-01814 impeller be replaced? This impeller should be replaced as part of routine water pump service or when reduced cooling water flow or overheating is noticed on applicable MerCruiser Alpha One Generation II and Vazer drives.

What is the UPC for part 47-01814? The UPC for the Engineered Marine Products 47-01814 impeller is 840080473048.

How do I confirm my drive uses the 47-01814 impeller? Check that your MerCruiser Alpha One Generation II or Vazer drive has a serial number of 0D494569 or above, which is the fitment range for part 47-01814.

Can 18-3056 and 47-01814 be used interchangeably? Yes, since 47-01814 is a direct equivalent to OEM part 18-3056, either number identifies the same impeller for Alpha One Generation II and Vazer drives serial 0D494569 and above.