I hope I am not confused on what I am looking at. I have the M35 diesel and the pump that is leaking is belt driven. I looked at the website you directed me to Stu. It shows a belt driven pump high on the front of the engine that is labeled fesh water pump. I assume there is no shaft running inside from the engine. Water is coming from holes on the back/bottom side of this pump. I could not find a parts blowup of this pump on the website, although they have a fresh water pump listed on their parts catalog. I will pull it off and see what it looks like from behind. Thanks for the help.