Small Engines (Lawn Mowers, etc.): J D L120 lawn tractor

Question
can not get the blades to ingage worked fine before what do i look for. belts look good.

Answer
Does your mower have an electric PTO clutch?  Do you have a switch to turn the blades on or do you have a lever you have to move to engage the blades?

If you have an electric PTO clutch, did you check to see if power is going to the clutch when you activate the blade switch?

Eric