Sierra 18-3327 Water Pump Kit with Housing - Replaces 394711, 386697, 391698, 389112, 387610

The Sierra 18-3327 Water Pump Kit with Housing is a complete cooling system rebuild kit designed to restore proper raw water circulation. The kit is built around a housing assembly and includes a stainless steel bolt (qty. 2, part 319126) along with a dedicated impeller (Sierra 18-3050, O.E. #386084), giving installers everything needed to replace a worn or failed water pump in one package rather than sourcing individual components separately.

Stainless steel hardware is used for corrosion resistance in the marine environment, and the kit is engineered to meet or exceed the quality of the original equipment part it replaces. This makes the 18-3327 a direct, drop-in solution for outboards originally fitted with any of the OEM water pump components it cross-references, helping restore consistent engine cooling and prevent overheating caused by a degraded pump housing or impeller.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3327
• Product Type: Water Pump Kit
• Housing Included: Yes
• Impeller Included: Sierra 18-3050 (O.E. #386084)
• Bolt Included: Stainless Steel Bolt, part 319126, quantity 2
• Material: Stainless Steel
• Weight: 0.42 pounds
• UPC: 030999875433
• OEM Cross Reference: 394711, 386697, 391698, 389112, 387610

Fitment

Fits applications originally equipped with a water pump using OEM part numbers 394711, 386697, 391698, 389112, or 387610.

Replaces (OEM)

• 394711
• 386697
• 391698
• 389112
• 387610

Frequently Asked Questions

What does the Sierra 18-3327 Water Pump Kit include? The kit includes a water pump housing, a Sierra 18-3050 impeller (O.E. #386084), and a stainless steel bolt (part 319126, quantity 2), giving you the complete set of components to rebuild the water pump in one package.

Which OEM part numbers does the 18-3327 replace? Sierra 18-3327 replaces OEM numbers 394711, 386697, 391698, 389112, and 387610.

Is the impeller included in this kit, or sold separately? Yes, the impeller is included as part of the 18-3327 kit; it is the Sierra 18-3050 impeller, cross-referenced to O.E. #386084.

What material is the hardware in this kit made from? The bolt included with the 18-3327 kit (part 319126) is made of stainless steel for corrosion resistance in marine use.

How much does the Sierra 18-3327 Water Pump Kit weigh? The Sierra 18-3327 Water Pump Kit weighs 0.42 pounds.

How many bolts come with the 18-3327 kit? Two stainless steel bolts (part 319126) are included with the Sierra 18-3327 Water Pump Kit.

Does this kit come with a housing? Yes, the Sierra 18-3327 is a water pump kit with housing included, not just an impeller replacement.

Will this kit work as a genuine replacement or is it aftermarket? The Sierra 18-3327 is manufactured to meet or exceed the quality of the original equipment components it replaces, including OEM numbers 394711, 386697, 391698, 389112, and 387610.

What is the UPC for the Sierra 18-3327 Water Pump Kit? The UPC for the Sierra 18-3327 Water Pump Kit is 030999875433.

How is the 18-3327 different from buying the impeller alone (18-3050)? The 18-3327 is the full kit that includes the housing and mounting bolts along with the 18-3050 impeller, whereas the impeller alone does not include the housing or hardware.

What part number should I reference when ordering this kit? Order using Sierra part number 18-3327 for the complete water pump kit with housing.