An alternator belt for Yanmar fresh water (indirect) cooled GM models. Fresh water cooled models have the letter "F" in the model code - i.e. 2GM20F, and have a heat exchanger filled with antifreeze/coolant, and the belt passes around three pulleys.
Suitable for the following Yanmar engines:
14/30, 14/35, 15/30D, 15/35.