19300-ZY3-023 Thermostat Assembly – Overview

The 19300-ZY3-023 Thermostat Assembly is a vital component within the Honda marine engine cooling system. Its primary function is to regulate the engine’s operating temperature by controlling the flow of coolant. Maintaining the correct temperature ensures your engine runs efficiently, minimizes wear, and prevents overheating or undercooling. Designed exclusively for Honda 4-stroke outboard engines ranging from 9.9 HP up to 225 HP, this thermostat assembly seamlessly integrates into the cooling system, supporting optimal engine performance and durability.

Key Features

• OEM quality Honda Thermostat Assembly designed to meet or exceed factory specifications.
• Precisely regulates coolant flow to maintain engine temperature at approximately 60°C (140°F).
• Compatible with Honda outboard engines including BF8D, BF9.9D, BF15D, BF20D, BF115, BF130, BF150, BF175, BF200, and BF225 series.
• Durable construction ensures reliable operation in marine environments, resisting corrosion and wear.
• Designed for direct fitment, it integrates perfectly with existing hardware, seals, and housings.
• Helps maximize engine performance, fuel efficiency, and longevity by maintaining stable operating temperatures.

Why Choose Genuine OEM

Using original Honda parts like the 19300-ZY3-023 Thermostat Assembly preserves the integrity of your marine engine. OEM parts maintain the exact material quality, precision dimensions, and tolerances set by the manufacturer, which are crucial for preserving system reliability and performance. Genuine thermostats reduce the risk of improper fitment, coolant leaks, or engine overheating that can occur with aftermarket alternatives. Choosing Honda OEM ensures consistency in operation and protects your investment for years to come.

Why choose PartsVu?

As your Marine Parts and Outboards Superstore, PartsVu makes maintaining, repairing, and upgrading your boat easier. Founded by boaters for boaters, PartsVu offers complete catalogs of OEM parts and products for Honda outboards along with other leading marine brands. Our user-friendly Shop By Engine functionality, expert customer service, and extensive knowledge resources remove the guesswork from parts selection. With fast shipping and secure checkout, you get trusted parts delivered when you need them, helping you enjoy the water without worry.

• Engine Application
  Honda

  • 115hp pre 1997
  • 130hp 2002-2004
  • 140hp 2007 and later
  • 150hp 2004 and later