Water Pump Impeller for Nissan Tohatsu 9.9 15 18 HP 4-Stroke 18-8921 334-65021-0

Water Pump Impeller for Nissan Tohatsu 9.9 15 18 HP 4-Stroke

This water pump impeller, cross-referenced as 18-8921 and 334-65021-0, replaces the worn impeller inside the water pump assembly for Nissan and Tohatsu 9.9, 15, and 18 HP 4-stroke outboards.

Overview

This water pump impeller is designed to keep cooling water circulating through the pump for Nissan and Tohatsu outboards rated 9.9, 15, and 18 HP with 4-stroke engines. Replacing the water pump impeller during routine service helps maintain proper water flow and prevent overheating. The water pump impeller matches cross-reference numbers 18-8921 and 334-65021-0 for easy ordering.

Built For Performance

• Replacement water pump impeller for Nissan and Tohatsu 9.9, 15, and 18 HP 4-stroke outboards
• Cross-references to OEM part numbers 18-8921 and 334-65021-0
• Flexible impeller blades move water through the cooling system
• Designed for the water pump housing in lower-unit applications
• Supports dependable water flow for 4-stroke outboard cooling

Fits These Machines

• for Nissan/Tohatsu 9.9 HP 4-stroke
• for Nissan/Tohatsu 15 HP 4-stroke
• for Nissan/Tohatsu 18 HP 4-stroke

On-The-Job Use

• Replacing the water pump impeller during annual outboard service
• Repairing low water flow from the cooling system while on the water
• Rebuilding the water pump assembly in Nissan and Tohatsu 4-stroke outboards
• Performing preventative maintenance before the boating season

Specs At A Glance

Good To Know

Q: Will this impeller fit a 9.9 HP outboard for Nissan or Tohatsu? A: This water pump impeller is designed for Nissan and Tohatsu 9.9, 15, and 18 HP 4-stroke outboards. Verify the original part number 18-8921 or 334-65021-0 matches your pump assembly.

Q: How often should the water pump impeller be changed? A: Replacing the water pump impeller every year or after about 100 hours of use is a common marine maintenance interval. Always inspect the pump housing and wear plate when replacing the impeller.

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