Engineered Marine Products Water Pump Kit with Housing 46-46502 for MerCruiser Alpha I Generation II & Vazer

The Engineered Marine Products 46-46502 Water Pump Kit with Housing is a complete cooling system rebuild kit built for MerCruiser Alpha I - Generation II & Vazer drives with serial number 0D494569 and above. The kit is constructed from stainless steel for corrosion resistance in raw-water cooling service and includes the water pump housing assembly, face plate, and base gasket needed to restore proper cooling flow to the engine. It is engineered and sourced to meet OEM standards, giving boat owners a direct, affordable path to replace a worn or failing water pump assembly without sourcing each component separately. This kit is the aftermarket equivalent of Quicksilver part number 18-3147, which is the water pump kit specified for this serial number range. Inside the kit, the face plate corresponds to Quicksilver 18-3122 (O.E. 817276), the housing assembly is a non-separately-sold component (O.E. 817275A1), and the base gasket corresponds to Quicksilver 18-2564 (O.E. 27-43033-1). Engineered Marine Products backs the kit with a 1 year manufacturer warranty. Confirm your drive's serial number falls within the 0D494569-and-above range before ordering, since earlier Alpha I units and other MerCruiser drive generations use different water pump part numbers.

Specifications

• Brand: Engineered Marine Products
• Manufacturer Part Number: 46-46502
• Material: Stainless Steel
• Weight: 1.389 pounds
• Item Type: Water Pump Kit with Housing
• Included Components: Water pump housing assembly, face plate, base gasket
• Fitment: MerCruiser Alpha I - Generation II & Vazer, serial number 0D494569 and above
• Replaces (Quicksilver): 18-3147
• Manufacturer Warranty: 1 year
• UPC: 840080428512

Fitment

• MerCruiser Alpha I - Generation II & Vazer drives, serial number 0D494569 and above

Replaces (OEM)

• Quicksilver 18-3147 (complete kit)
• Quicksilver 18-3122 / O.E. 817276 (face plate)
• O.E. 817275A1 (housing assembly)
• Quicksilver 18-2564 / O.E. 27-43033-1 (base gasket)

Frequently Asked Questions

What does the EMP 46-46502 water pump kit fit? It is built for MerCruiser Alpha I - Generation II & Vazer drives with serial number 0D494569 and above; earlier Alpha I serial ranges use a different water pump kit number.

Is 46-46502 the same as Quicksilver 18-3147? Yes, the Engineered Marine Products 46-46502 kit is the aftermarket equivalent of Quicksilver part number 18-3147, which is the water pump kit listed for the Alpha I Generation II & Vazer serial range.

What is included in the 46-46502 water pump kit? The kit includes the water pump housing assembly, a face plate, and a base gasket, which are the components needed to rebuild the Alpha I Generation II water pump.

Does the kit include the impeller? The 46-46502 kit is documented as a housing assembly, face plate, and base gasket set; an impeller is not listed among its included components in the source data.

What material is the 46-46502 water pump kit made from? The Engineered Marine Products 46-46502 kit is made of stainless steel, chosen for corrosion resistance in raw-water cooling systems.

How much does the 46-46502 water pump kit weigh? This kit weighs 1.389 pounds.

How can I tell if my drive is in the correct serial range for this kit? Check your MerCruiser Alpha I - Generation II & Vazer drive's serial number; the 46-46502 kit applies to units with serial number 0D494569 and above.

What is the OEM part number for the face plate in this kit? The face plate included in the 46-46502 kit corresponds to Quicksilver 18-3122, factory O.E. Number 817276.

Is the housing assembly sold separately? No, the housing assembly in the 46-46502 kit is listed as a non-separately-sold (N.S.S.) component, factory O.E. Number 817275A1, meaning it is only available as part of the kit.

What OEM number does the base gasket replace? The base gasket in the 46-46502 kit corresponds to Quicksilver 18-2564, factory O.E. Number 27-43033-1.

Is this a genuine Mercury part or aftermarket? The 46-46502 is an Engineered Marine Products aftermarket kit engineered to OEM standards as a replacement for Quicksilver 18-3147, not a genuine Mercury-branded part.

Does the 46-46502 kit come with a warranty? Engineered Marine Products backs the 46-46502 water pump kit with a 1 year manufacturer warranty.