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SKU:
ZZ3F03268
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76.5℃ Thermostat 129470-49801 Fit Yanmar 3JH 4JH 4JH2 4JH3 3JH2-E 3JH3-E 4JH3-E
$47.99
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
Thermostat for Yanmar
This 76.5℃ thermostat is a cooling system component for marine and industrial Yanmar diesel engines, referencing OEM cross-reference 129470-49801. It ensures the engine reaches and maintains its proper operating temperature for efficient combustion and reduced wear. This thermostat is designed to fit specific Yanmar 3JH and 4JH engine models.
Overview
This 76.5℃ thermostat for Yanmar engines regulates coolant temperature, ensuring optimal thermal conditions for combustion efficiency. It is a direct replacement part for Yanmar 3JH, 4JH, and related engine series, helping to maintain peak performance. This thermostat helps prevent engine damage caused by running at incorrect temperatures.
Built For Performance
- OEM reference number 129470-49801 for exact match compatibility
- Opens at 76.5 degrees Celsius for precise temperature control
- Constructed with corrosion-resistant materials for long service life
- Ensures rapid engine warm-up for reduced cold-start wear
- Maintains consistent operating temperature for efficient fuel combustion
Fits These Machines
- for Yanmar 3JH
- for Yanmar 4JH
- for Yanmar 4JH2
- for Yanmar 4JH3
- for Yanmar 3JH2-E
- for Yanmar 3JH3-E
- for Yanmar 4JH3-E
On-The-Job Use
- Replaces a faulty thermostat during routine marine engine maintenance
- Ensures proper coolant flow in sailboat or powerboat auxiliary engines
- Supports reliable operation in commercial or recreational marine applications
Specs At A Glance
| Part Number(s) | 129470-49801 |
| Opening Temperature | 76.5℃ |
| Type | Thermostat |
| Compatibility | Yanmar 3JH & 4JH Series |
Good To Know
Q: How do I know if my Yanmar thermostat needs replacing? A: Symptoms include slow engine warm-up, fluctuating temperature gauge, or the engine running cooler than normal. This 76.5℃ thermostat restores proper thermal regulation to prevent inefficient operation.
Q: Is this thermostat a direct OEM replacement? A: Yes, it is designed as a direct replacement for the OEM part number 129470-49801, ensuring it fits and functions like the original component in your Yanmar engine.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.