Water Pump Impeller for Mercury Mariner 40-250 HP 18-3056 47-43026-2 47-43026T2

Water Pump Impeller for Mercury Mariner

This water pump impeller for Mercury Mariner outboards is a direct replacement for OEM part numbers 18-3056, 47-43026-2, and 47-43026T2, designed to circulate cooling water in engines from 40 to 250 HP. It maintains proper engine temperature and prevents overheating.

Overview

The water pump impeller for Mercury Mariner systems moves coolant through the engine block, ensuring efficient heat dissipation. It is a critical component for any outboard motor's cooling system, and this replacement matches OEM quality for reliable performance.

Built For Performance

• Premium rubber and composite construction for durability
• Precise blade geometry for maximum water flow
• Replaces multiple OEM numbers: 18-3056, 47-43026-2, 47-43026T2
• Resists wear from sand and debris
• Includes necessary gasket and key for installation

On-The-Job Use

• Essential for outboards used in fresh or saltwater
• Common in fishing, cruising, and commercial vessels
• Prevents engine damage from overheating during extended runs
• Swapped during routine water pump service

Specs At A Glance

Good To Know

Q: How do I know if my water pump impeller needs replacement? A: Check for reduced water flow from the tell-tale or overheating. Typically replace every 2-3 seasons or 300 hours.

Q: Is this impeller identical to the original Mercury Mariner part? A: It is engineered to match OEM dimensions and performance, so it fits and functions just like the factory part.

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