Water Pump Impeller Kit 8M0135821 8M0137849 FIT Mercury Outboard 9.9 10 15 20 HP

Water Pump Impeller Kit for Mercury

This water pump impeller kit, with OEM cross-reference numbers 8M0135821 and 8M0137849, delivers reliable cooling for Mercury outboard engines.

Overview

This water pump impeller kit is a direct replacement for Mercury outboard engines. It includes the impeller and necessary gaskets to keep your cooling system running efficiently. Designed for Mercury outboard models from 9.9 to 20 HP, this water pump impeller kit ensures proper water flow to prevent overheating.

Built For Performance

• Precision-molded impeller for consistent water flow
• Includes all necessary gaskets and seals
• Engineered for Mercury outboard cooling systems
• Replaces OEM part numbers 8M0135821 and 8M0137849
• Direct fit for 9.9, 10, 15, and 20 HP Mercury outboards

Fits These Machines

• for Mercury 9.9 HP
• for Mercury 10 HP
• for Mercury 15 HP
• for Mercury 20 HP

On-The-Job Use

• Restores cooling performance on small Mercury outboards
• Ideal for routine maintenance of freshwater and saltwater engines
• Ensures reliable water pump operation during long fishing trips
• Useful for replacing worn impellers during annual service

Specs At A Glance

Good To Know

Q: How often should I replace the water pump impeller? A: It is generally recommended to replace the impeller every 100 hours or annually, whichever comes first. This kit provides the necessary parts for a straightforward replacement.

Q: What causes impeller failure? A: Impeller blades can crack or wear out due to heat, dry running, or debris. Replacing the impeller with this kit restores proper water flow and prevents overheating.

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