Yanmar Thermostat | 3JH & 4JH Series | 129470-49801

Description

The Yanmar Thermostat Ø76.5 mm (129470-49801) is designed to regulate engine operating temperature by controlling coolant flow in Yanmar 3JH and 4JH series marine diesel engines. Proper thermostat operation is essential for efficient combustion, reduced engine wear, and stable cooling system performance.

Manufactured to precise OEM specifications, this thermostat ensures accurate opening temperature, reliable operation, and correct fitment. It is suitable for routine maintenance, cooling system servicing, or replacement of a faulty thermostat to prevent overheating or overcooling.

Product Type

Engine thermostat

Part Number

129470-49801
(replaces / supersedes 129470-4980)

Diameter

Ø 76.5 mm

Compatibility

3JH Series

• Yanmar 3JH25

• Yanmar 3JH30

• Yanmar 3JH2 (B)E

• Yanmar 3JH2 T(B)E

• Yanmar 3JH3 E

• Yanmar 3JH4 E

• Yanmar 3JH5 E

• Yanmar 3JH40-CR

4JH Series

• Yanmar 4JH E

• Yanmar 4JH TE

• Yanmar 4JH HTE

• Yanmar 4JH DTE

• Yanmar 4JH2 (B)E

• Yanmar 4JH2 T(B)E

• Yanmar 4JH2 HT(B)E

• Yanmar 4JH2 DT(B)E

• Yanmar 4JH2 UT(B)E

• Yanmar 4JH3E EU

• Yanmar 4JH3 TE

• Yanmar 4JH3 HTE

• Yanmar 4JH3 DTE

• Yanmar 4JH4 E

• Yanmar 4JH4 AE

• Yanmar 4JH4 TE

• Yanmar 4JH4 HTE

• Yanmar 4JH5 E

• Yanmar 4JH45-CR

• Yanmar 4JH57-CR

• Yanmar 4JH110-CR