New Water Pump Impeller Mercury Mariner 47-89981 4HP 4.5HP 7.5HP Outboard Motor

Water Pump Impeller for Mercury Mariner

This water pump impeller for Mercury Mariner outboard motors replaces OEM reference number 47-89981, ensuring reliable coolant flow for 4HP, 4.5HP, and 7.5HP models.

Overview

This water pump impeller is a direct replacement component for Mercury Mariner outboard engines in the listed power range. It keeps the cooling system flowing to prevent overheating during operation. Designed for small outboards, this water pump impeller fits multiple horsepower ratings.

Built For Performance

• Precision-molded rubber vanes for consistent water flow
• Corrosion-resistant polymer hub
• Reinforced structure for extended service life
• Direct replacement for OEM part number 47-89981
• Maintains proper cooling at low and high RPM

Fits These Machines

• for Mercury Mariner 4HP Outboard
• for Mercury Mariner 4.5HP Outboard
• for Mercury Mariner 7.5HP Outboard

On-The-Job Use

• Routine replacement to prevent overheating
• On small aluminum fishing boats
• As an auxiliary engine on larger vessels
• In saltwater and freshwater environments

Specs At A Glance

Good To Know

Q: What does an impeller do? A: It pumps water through the cooling system to prevent the engine from overheating.

Q: When should it be replaced? A: Typically every 100 hours or once a season, whichever comes first, to maintain reliable cooling.

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