Jimbob,
Almost any dealer in the US will have a service manual--it will not be exactly for the YM1500, but will be for the closest model that was sold in the US. For my YM 1510D it is the YM 186. The parts manual is available on CD so it would be easy to send to you, the service manual is big and would be expensive--or very slow to send to you. However, in the mean time, if you have a particular area that you want to know something about, there may be some one who has a manual who could scan a few pages and send them to you via email.
I read about and saw pictures of the devastation with the flood in your area. Did it affect you?
Welcome to TBN. If you have a question just ask.
Mike