First question -
i have heard that cubs dont have waterpumps and was wondering how the water circleated
Cubs have a thermo-siphon cooling system and a little steam isn't much to worry about.
I would suggest the following.
You should go to http://www.binderbooks.com
and order the following:
Cub Owner's Manual
TC-37F Parts Manual
GSS-1411 Service Manual
These are invaluable and essential in using, maintaining and repairing your Cub. Until you have your own copy, I would suggest that you click the manual link below and have a read in the Owner's Manual. Many of these questions will be answered. Also you could go to the ATIS Cub FAQ's (frequently asked questions) at http://www.atis.net/CubFAQ/cub_faq.html
and there is tons of really good info there as well. Also, the Best of H.L. Chauvin is a good read as well and can be found on the home page of this forum.
Hope this helps