| 摘要 |
A water-cooled internal combustion engine includes a water pump having a short pump drive shaft for reducing the weight and size thereof. In a water-cooled internal engine equipped with power transmission control means at the end of a crankshaft, a water pump having a water pump drive shaft parallel to the crankshaft is disposed on the axial inside of the power transmission control means, that is, on a central side of the crankshaft.
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