toro workman belt problems and acceleration

[beachbumtroy]

please let me know also i got this in right forum...just bought my 1st ever cart, year still unknown but its a toro workman (i believe) 2110 model#07277, i bought it the other day and the little old man :) told me the belt was stretched out, and he showed me it ran started it up and we drove around for a few minutes before the belt started slipping......so i bought it ordered a new belt came in today put on and backed out of garage, and that was it wouldnt go forward or backward p.s this is gas, seemed like the engine wasnt running i mean it started but when u gave gas it didnt throttle up? same speed? anyway put the old belt back on and nothing again? belts old and new seem identical in size old belt has alot of cracks in it, is there a way to adjust pulleys to tighten belt? should i get a smaller belt,just unsure of what to do next...motor revved up fine at sellers house now it starts but doesnt seem to accelerate? was wondering if its motor,or is it suppose to be like that if belt to loose? would appreciate some direction as to what to do next, sorry so long but wanted to try and give u guys an idea of what was what...im printing up manuals and trying to find all info on net i have the serial number or any other info u need to help me figure this out just holler. thnx bb