So the problems goes on. I got the waterpump out and took it to a Yamaha dealer and they confirm its was the mechanical water seal that has failed. So ordered a new one and it come in two parts. One is like the main housing made of metal and a spring (ill see about getting photos tomorrow) and the other is a small rubber seal. however when you look at the manual it shows these as one piece and there is no obvious way to make them one and to make it all seal to the impeller shaft.

has any one any photos of theres?

even after phoning my Yamaha dealer they hadn't a clue and even tried to get me to book it in through their service department to get one of their mechanics to look at it!!! hopefully if I turn up tomorrow they might be able to sort it!!

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Plough on