76.5℃ Thermostat 129470-49801 Fit for Yanmar 3JH 4JH Marine Diesel Engine 3TNV88
$47.99
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$47.99
Regular price
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SKU:
ZZ3F03269
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76.5℃ Thermostat 129470-49801 Fit for Yanmar 3JH 4JH Marine Diesel Engine 3TNV88
$47.99
In Stock
$47.99
Sale price
$47.99
Regular price
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Compatible equipment / model
76.5℃ Thermostat for Yanmar 129470-49801
This 76.5℃ thermostat, referencing Yanmar part number 129470-49801, is a direct replacement cooling component engineered to maintain optimal engine operating temperature for Yanmar marine diesel engines. It is designed to replace the original thermostat in Yanmar 3JH and 4JH series engines, ensuring reliable thermal regulation. This 76.5℃ thermostat for Yanmar is a critical part for maintaining efficient combustion and preventing engine overheating or running too cool.
Overview
This 76.5℃ thermostat for Yanmar is a vital cooling system component that regulates coolant flow to keep the engine at its ideal temperature. It is specifically designed for use in Yanmar 3JH and 4JH marine diesel engines, as well as the 3TNV88 industrial engine. By maintaining a consistent 76.5°C operating temperature, this thermostat for Yanmar ensures efficient fuel burn and reduced engine wear.
Built For Performance
- Precisely calibrated to open at 76.5°C for optimal engine temperature control
- Direct replacement for Yanmar part number 129470-49801
- Constructed with corrosion-resistant materials for long-lasting marine durability
- Engineered to meet OEM specifications for reliable performance
- Includes a robust wax pellet element for accurate and consistent operation
Fits These Machines
- for Yanmar 3JH
- for Yanmar 4JH
- for Yanmar 3JH2-E
- for Yanmar 4JH3-E
- for Yanmar 3TNV88
On-The-Job Use
- Replaces a faulty or stuck thermostat during routine marine engine maintenance
- Essential for repowering or rebuilding a Yanmar 3JH or 4JH diesel engine
- Used by boat owners and mechanics to restore proper engine cooling system function
- Commonly installed when an engine runs too hot or fails to reach operating temperature
Specs At A Glance
| Opening Temperature | 76.5°C |
| Part Number(s) | 129470-49801 |
| Engine Type | Marine Diesel |
Good To Know
Q: How does this thermostat work? A: This thermostat contains a wax pellet that expands when the coolant reaches 76.5°C, opening the valve to allow coolant to flow to the radiator. When the engine cools, the pellet contracts, closing the valve to help the engine warm up quickly.
Q: What are signs of a failing thermostat? A: Common symptoms include the engine overheating, running too cool, or taking an excessively long time to reach operating temperature. Replacing a worn thermostat with this 76.5℃ unit helps ensure consistent engine performance.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.