Does anyone know where i can get pics or diagrams for my 51 super 10 it is having issues one of them being what type of oil and where to put it ..thanks

Your WG7 is based on Mercury's KG7. Although they aren't an exact match, you can get diagrams for the KG7 here that should help you out somewhat:

http://pub9.bravenet.com/photocenter/album.php?usernum=737212788&album=49288#bn-photocenter-1-1-737212788/49288/1/

As far as oil, are you referring to fuel mixture or lower unit lubrication?

JP

Thank you so much. I was referring to the lower unit.

The seals are known for not being great on those lower units. Oldmercs.com and a lot of guys would recommend using Lubriplate #105 grease, or you can substitute Cornhead grease (do not substitute white Lithium grease...it's not the same). Conventional lower unit oil is not considered sufficient by most for this vintage of lower units.

JP

Thankyou again, for the information and links. They will be very useful.