I'm having problems with my John Deere mower

[b.wilso]

There are 600 hours on mower and the problem is that the mower will start and mow, but after about 5 minutes it won't pull hills. I was wondering if any of you all could give me an idea of whats wrong.

 

[Benny R.]

There are 600 hours on mower and the problem is that the mower will start and mow, but after about 5 minutes it won't pull hills. I was wondering if any of you all could give me an idea of whats wrong.

It is always helpful to include more info about the mower; make , model , etc!

 

[EngineMan]

If the engine runs OK then check the drive belt.