Water Pump Impeller for Mercury Mariner 6~15HP Outboard 47-420382 47-42038Q02

Water Pump Impeller for Mercury Mariner

This water pump impeller for Mercury Mariner outboards is designed for 6 to 15 HP models, replacing OEM part numbers 47-420382 and 47-42038Q02.

Overview

The water pump impeller for Mercury Mariner is a critical component that circulates cooling water through the outboard engine. This water pump impeller fits 6 to 15 HP Mercury Mariner outboards and ensures the engine operates at safe temperatures. Made from high-quality rubber, this water pump impeller provides reliable water flow to prevent overheating.

Built For Performance

• Precision-molded impeller blades for efficient water circulation
• Constructed from durable, oil-resistant rubber
• Replaces OEM part numbers 47-420382 and 47-42038Q02
• Ensures consistent water flow to cool the engine under load
• Easy to install with basic tools

Fits These Machines

• for Mercury Mariner 6HP
• for Mercury Mariner 8HP
• for Mercury Mariner 9.9HP
• for Mercury Mariner 15HP

On-The-Job Use

• Transfers cooling water from the lower unit to the engine block
• Essential for preventing overheating during extended runs
• Commonly replaced as part of annual outboard maintenance
• Used in fresh and saltwater applications

Specs At A Glance

Good To Know

Q: How often should I replace the water pump impeller? A: Most manufacturers recommend replacing the impeller every 2 to 3 years or after 100 hours of operation. If you notice a drop in water pressure from the tell-tale, inspect the impeller.

Q: What happens if the impeller fails? A: A worn or broken impeller can cause the engine to overheat, leading to severe damage. Replacing it proactively ensures reliable cooling and extends engine life.

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