Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Hello, are you changing the blade belt? I found a parts manual and site. http://partsandservice.com/html/Murray/lt/lt40507x8c.html
The belt may not be routed properly. Does the deck in the parts view the same as the deck on the tractor?
I couldn't find a service manual and can't do anymore so I am opting out.
The proper belt size is 1/2" X 86" What belt did you purchase?
Is the idler pulley working like it should. It will move and spring back under pressure.
Not a problem. Have a Happy 4th.
That is the correct belt for that model mower. I will include another Deck Diagram. I am beginning to wonder if someone may have installed the wrong pulleys on the machine at some time. Do any of the pulleys look newer? I have seen people install wrong pulleys and then a new bel will not work due to change in pulley size.
Not sure how they do this. I have only been on here approx. 3 weeks. I uploaded a Parts Manual from Murray for you. It is pretty clear to see. I will see what I can do about a Service Manual for you.