it has 2 belts one from engine to a double pulley then another belt from the double pulley to the transmission I needto know how to route the belt from the double pulley from the transmission the model number I go frm the back of it was 4-36516x57 thanks

Hi,
Your model number is a Murray number for an '84 model. See if this looks similar:
http://www.mymowerparts.com/pdf/Murray_Models_1968_Thru_1989/84-36508.pdf
Peace,
Clarke