MERCURY MARINER 25 30 40 50 HP WATER PUMP IMPELLER REPAIR KIT REPL 821354A2 3219

Water Pump Impeller Repair Kit for Mercury Mariner

This water pump impeller repair kit for Mercury Mariner 25 30 40 50 HP outboards replaces OEM 821354A2 and 3219 to restore cooling flow and prevent overheating.

Overview

The water pump impeller repair kit for Mercury Mariner outboards delivers the parts needed to rebuild a worn cooling pump. This water pump impeller repair kit keeps 25 30 40 50 HP engines running cool on the water. Boaters and marine mechanics use this kit to restore proper water circulation in Mercury Mariner outboards.

Built For Performance

• Replaces OEM 821354A2 and 3219 part numbers
• Flexible molded impeller blades maintain prime for steady water flow
• Corrosion-resistant construction suits saltwater and freshwater use
• Kit includes sealing components needed for a complete repair
• Engineered to match Mercury Mariner water pump housing dimensions

Fits These Machines

• for Mercury Mariner 25 HP outboard
• for Mercury Mariner 30 HP outboard
• for Mercury Mariner 40 HP outboard
• for Mercury Mariner 50 HP outboard

On-The-Job Use

• Replaces a worn impeller during routine water pump service
• Restores cooling flow for fishing boats and runabouts
• Supports rental fleet and commercial outboard maintenance
• Prepares a Mercury Mariner outboard for a new season

Specs At A Glance

Good To Know

Q: How often should a water pump impeller repair kit be installed? A: Most outboard manufacturers recommend replacing the impeller every one to three seasons or about every 100 operating hours. A worn impeller reduces cooling flow and can lead to engine overheating.

Q: What does the kit include? A: The kit includes the impeller and the seals, gaskets, or washers needed for a basic water pump rebuild. Confirm the contents against the service manual before assembly.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.