I have a 38" Murray riding mower, yeah an old one, I put a new drive belt on it. I know I have it on right. However, now my clutch won't push down. I've adjusted it every way known to man. What is wrong. Someone said the belt was to small but it seems the same as my old one, which was pretty mangled. It was 30 years old.

What is your model number and what size belt did you install?

Model 38618x92A
belt 37x61

Still looking for your model but maybe you have your belt on the wrong side of the tensioner pulley.

Hi,
Right belt number and here is the link to the breakdown:
Murray lt Parts Diagram Index for 38618X92A (http://partsandservice.com/html/Murray/lt/lt38618x92a.html)
Peace,
Clarke