19313-ZVL-020 Honda Thermostat Spacer | Genuine Used Part

🔧 Product Description

Genuine Honda Thermostat Cover Spacer - Part Number: 19313-ZVL-020

A genuine used Honda thermostat-cover spacer for selected BF175D, BF200D, BF225D and BF250D four-stroke outboards.

The spacer sits between the exhaust-manifold thermostat cavity and the outer thermostat cover. It provides the required depth and coolant passage geometry for the thermostat, sealing ring and cover assembly.

⚙️ Key Features

• Genuine Honda Marine OEM thermostat-cover spacer
• Correct current Honda part number 19313-ZVL-020
• Used on D-series BF175D through BF250D outboards
• Unpainted service alternative to the unavailable dark-gray suffix version
• Maintains thermostat alignment and cooling-water passage shape

🚤 Compatibility

Commonly used on

• Honda BF175D, BF200D, BF225D and BF250D exhaust-manifold thermostat assemblies
• Honda ZVL-family V6 cooling systems

Typically suits

• Engine models:
• Honda BF175D
• Honda BF200D - BBRJ-1000001 and above
• Honda BF200DK1 - BBRJ-1100001 and above
• Honda BF225D - BBPJ-1000001 and above
• Honda BF225D regional models - BBPJ-8000001 and above
• Honda BF225DK1 later-production models
• Honda BF250D - BBNJ-1000001 and above
• Honda BF250D regional models - BBNJ-8000001 and above
• Honda BF250DK1 - BBNJ-1100001 / 8100001 and above
• HP Range: 175HP - 250HP
• Engine Type: Honda V6 four-stroke outboard
• Year Range: Approximately 2018 onward

🔌 Function

The spacer forms the thermostat chamber between the exhaust manifold and outer cover. It keeps the thermostat and sealing ring correctly positioned and directs cooling water through the intended passages.

⚠️ Common Signs of Failure

• Spacer is cracked, warped or corroded
• Gasket or sealing-ring surfaces are pitted
• Cooling water leaks around the thermostat housing
• Thermostat does not seat at the correct depth
• Bolt holes or mounting bosses are damaged

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 19313-ZVL-020 current unpainted service replacement
• 19313-ZVL-020ZA later NH8 dark-gray version; use 19313-ZVL-020 where unavailable
• 19313-ZVL-010ZA earlier dark-gray spacer version
• 19313-ZVL-000ZA earlier catalogued spacer reference

OEM / Related Numbers

• 19313-ZVL-020
• 19313ZVL020
• 19313-ZVL-020ZA
• 19313-ZVL-010ZA
• 19313-ZVL-000ZA
• 19315-ZVL-010ZA related thermostat cover
• 19300-ZX2-003 related thermostat assembly
• 19303-ZX2-003 related thermostat sealing ring

Aftermarket / Verified Equivalents

• No aftermarket equivalent

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated