Yamaha 684 maintenance manual

Hi,
My name is Tomislav and i just got an yamaha outboard to have a little fun this summer.
But i am not sure of model or year of the engine.
Can someone also please help me to find the maintenance manual for the model.
All i could in papers is Yamaha 684CS00060.
ANY INFO WOULD BE APRICIATED.

[boats.net]

684CS is a 2 stroke 15hp short shaft model but the serial number(00060) is missing a number.

thanks for that, can you tell me where to get an manual for such a model.i tryed on amazon, e bay but all manuals start at 1984.

[boats.net]

No Yamaha started selling motors in USA in 1984, there is no information motors older than that in USA.

thank you again.you have been very helpfull.
best regards , tomislav

[jb123]

looks like 1978

http://www.marinshopen.se/Hj%C3%A4lp...0/Default.aspx