Yamaha Motor Company 6R3-44322-40 Cartridge Insert

Description:

The Yamaha 6R3-44322-40-00 Cartridge Insert is a cooling system component used in marine outboard engine water pump and lower unit assemblies. Commonly installed in Yamaha outboard motors (115HP–250HP range) to direct and regulate cooling water flow through the engine. Maintenance teams and marine technicians use this part for replacement, repair, and restoration of worn or restricted cooling system components.

Applications:

The Yamaha 6R3-44322-40-00 Cartridge Insert is used in Yamaha marine outboard engines where controlled water flow is critical for maintaining proper engine temperature. It is commonly found in Yamaha 2-stroke outboards and high-horsepower marine engines, functioning within the water pump housing or cooling passages to guide water efficiently through the system. This component ensures stable cooling performance, prevents overheating, and supports long-term engine reliability under marine operating conditions.

Technical Specifications:

• Brand: Yamaha
• Part Number: 6R3-44322-40-00
• Product Type: Cartridge insert / water pump housing liner
• Function: Directs and regulates cooling water flow
• Application: Marine outboard engine cooling system
• Fitment: Yamaha outboards (approx. 115HP–250HP models, model-specific)
• Mounting Location: Water pump housing / lower unit cooling passage
• Material: Corrosion-resistant composite or metal alloy
• System Role: Maintains proper coolant flow and engine temperature
• Design: Precision-fit insert for water channel control
• OEM Status: Genuine Yamaha replacement component

Common Replacements:

• Yamaha 6R3-44322-42-00
• Yamaha 663-44322-40-00
• Yamaha 682-44322-40-00