4TNE94 Thermostat 121850-49810 for Yanmar Engines – Diesel Engine Cooling System Repair Parts

Product Details

Product Overview

This is a high-quality replacement thermostat, specifically designed for the Yanmar 4TNE94 diesel engine. The part number 121850-49810 is a critical component for regulating engine coolant temperature, ensuring optimal operating conditions and preventing overheating. This thermostat is a direct-fit replacement part, ideal for maintenance and repair of construction, industrial, agricultural, genset, marine, and material handling equipment powered by the Yanmar 4TNE94 engine.

Manufactured to meet OEM size specifications, this thermostat ensures reliable opening and closing temperatures, promoting efficient engine warm-up and stable temperature control. It is a key component for maintaining engine performance, fuel efficiency, and longevity. This part is a common service item for diesel engine rebuilds and routine cooling system maintenance.

Key Features & Benefits

• Precise Temperature Control: Engineered to open and close at the correct temperature, ensuring the engine reaches and maintains its ideal operating range for optimal combustion and efficiency.
• OEM-Spec Fitment: Manufactured to OEM size and design specifications for the Yanmar 4TNE94 engine, guaranteeing a direct, hassle-free installation without modifications.
• Durable Construction: Built with corrosion-resistant materials to withstand the harsh conditions of diesel engine operation, providing long service life and reliable performance.
• Enhanced Engine Protection: Prevents engine overheating and overcooling, reducing thermal stress and protecting critical components like the cylinder head, gaskets, and water pump.
• Improved Fuel Economy: Helps the engine reach operating temperature quickly and maintain it, leading to more complete fuel combustion and reduced fuel consumption.
• Wide Application: Suitable for a variety of equipment types including construction machinery, agricultural tractors, industrial pumps, marine generators, and material handling vehicles using the 4TNE94 engine.

Technical Specifications

OEM Cross-Reference

This thermostat is a direct replacement for the following OEM part numbers:

• Yanmar: 121850-49810

Note: This part is designed to be a direct replacement for the listed OEM number. While we strive for accuracy, please verify your original part number against the listing before purchase.

Compatibility

This thermostat is specifically designed for the Yanmar 4TNE94 diesel engine. It is commonly used for the following applications:

• Construction: Mini excavators, compact track loaders, backhoe loaders
• Industry: Forklifts, aerial work platforms, industrial pumps
• Agriculture: Tractors, harvesters, tillers
• Genset: Industrial and marine generator sets
• Marine: Small to medium marine propulsion engines
• Handling: Material handling equipment, skid steer loaders

Please confirm your specific engine model and application to ensure compatibility.

Global Supply & Distribution

We offer worldwide shipping capabilities to meet the needs of international B2B buyers. Our parts are exported to major markets including North America, Europe, Asia-Pacific, the Middle East, Africa, and South America. We ensure fast and reliable delivery to major ports and industrial centers globally.

With extensive experience in international trade and export documentation, we provide seamless logistics for wholesale orders. We understand the demands of the global aftermarket and are committed to providing timely and cost-effective shipping solutions for our clients.

Quality Assurance

Our thermostat is manufactured under strict quality control standards to ensure reliable performance and durability. Each unit undergoes rigorous testing to verify its opening temperature and seal integrity.

• Manufacturing Standards: Produced in an ISO-certified facility with advanced production technology.
• Warranty: Backed by a 6-month warranty against manufacturing defects.
• Testing: Machinery test reports and video outgoing inspections are provided upon request to ensure quality consistency.

FAQ

Q: What is the opening temperature of this thermostat for the Yanmar 4TNE94 engine?
A: While the specific opening temperature is not listed, this thermostat is designed to match the OEM specifications for the 4TNE94 engine. Typically, diesel engine thermostats for this model open around 82°C (180°F). Please consult your service manual for the exact temperature specification for your application.

Q: How do I know if my 4TNE94 engine needs a new thermostat?
A: Common signs of a failing thermostat include: the engine taking too long to warm up, the engine overheating quickly, fluctuating temperature gauge readings, or coolant leaks near the thermostat housing. If you experience any of these symptoms, replacing the thermostat is a recommended first step in troubleshooting the cooling system.

Q: Is this thermostat a direct replacement, and does it come with a gasket?
A: Yes, this thermostat is a direct-fit replacement for the OEM part number 121850-49810. It is designed to be installed without modifications. The product is typically packed in a plastic bag and box. It is recommended to purchase a new thermostat housing gasket separately to ensure a proper seal during installation.