Water Pump Rebuild Service for Mercury Mariner 9.9/15/18/20/25HP Outboard Engine

Water Pump Rebuild Service for Mercury Mariner

This water pump rebuild service for Mercury Mariner outboard engines restores the cooling system on 9.9, 15, 18, 20, and 25 HP models. The service rebuilds the water pump for Mercury Mariner outboards by replacing worn internal components and checking the housing for damage.

Overview

This water pump rebuild service for Mercury Mariner outboard engines provides a complete cooling system refresh for 9.9/15/18/20/25HP models. It is designed for boat owners who need a dependable water pump for Mercury Mariner outboards without replacing the entire pump assembly.

Built For Performance

• Complete disassembly and inspection of the water pump assembly
• Replacement of worn impeller, gaskets, and seals
• Cleaning of the housing and passages to restore cooling flow
• Bench test after assembly to confirm smooth operation
• Compatible with saltwater and freshwater cooled engines

Fits These Machines

• for Mercury Mariner 9.9HP outboard engine
• for Mercury Mariner 15HP outboard engine
• for Mercury Mariner 18HP outboard engine
• for Mercury Mariner 20HP outboard engine
• for Mercury Mariner 25HP outboard engine

On-The-Job Use

• For routine water pump maintenance on outboard engines
• For restoring water flow when the tell-tale stream weakens
• For pre-season preparation before launching a boat
• For addressing overheating issues on the water or at the dock

Specs At A Glance

Good To Know

Q: What does a water pump rebuild service include? A: The service includes disassembly, inspection, and replacement of worn water pump parts such as the impeller, gaskets, and seals. The pump is then reassembled and tested for smooth operation.

Q: When should this water pump service be performed? A: Outboard water pumps should be serviced every 1 to 3 years or after 100 hours of use, whichever comes first. Signs of weak water flow or overheating mean service should be done immediately.

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