I changed the deck drive belt on 1998 mtd yard machine with 13 hp and 38 inch deck with 754-0329A belt and now the blades say engaged all the time .how do I adjust the tension so they will disengage

james with bad luck, July 2008

First of all, you may want to double check the belts part number to make sure you have the right belt.
If you have the right belt then you must do the following. remove the engaging rod and turn the pin head ( that's what it is really called) counter clock wise two or three turns and reinstall it. And start the mower to see if that has fixed your problem. if not the idler pulley spring is installed wrong. you should invest in a manual for your paticular machine so you will be more able to do maintenance on your yard equipment yourself.

Mickey-G TN, July 2008