Water Pump Impeller Kit for Mercury Outboard 9.9 10 15 20 HP 4 Str 98-8M0135821

Water Pump Impeller Kit for Mercury

This water pump impeller kit, part number 8M0135821, provides essential cooling system service for Mercury outboard engines rated 9.9, 10, 15, and 20 horsepower four-stroke models.

Overview

This water pump impeller kit is a complete replacement solution for Mercury outboard engines, ensuring the cooling system operates efficiently to prevent overheating. It is designed for 9.9, 10, 15, and 20 HP four-stroke models, delivering reliable water flow for extended engine life. The kit includes the impeller and necessary components to restore proper water pump function.

Built For Performance

• Replacement impeller ensures consistent water circulation
• Durable rubber compound resists wear and heat
• Precision-molded blades for maximum pumping efficiency
• Kit includes required gaskets and seals for a full service
• Engineered to meet or exceed OEM specifications

Fits These Machines

• for Mercury 9.9 HP 4 Str
• for Mercury 10 HP 4 Str
• for Mercury 15 HP 4 Str
• for Mercury 20 HP 4 Str

On-The-Job Use

• Used in routine water pump maintenance to prevent overheating
• Ideal for freshwater and saltwater boating applications
• Replaces worn impellers that cause reduced cooling flow
• Common service during seasonal engine tune-ups

Specs At A Glance

Good To Know

Q: How often should I replace the impeller? A: It is typically recommended every 1-2 seasons or every 100 hours of operation, whichever comes first.

Q: Does this kit include everything needed for installation? A: Yes, it contains the impeller and essential gaskets and seals for a complete water pump service.

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