PTO belt running off

I have a cub cadet m 72 zero turn and when engaging the blades the pto belt runs off if the throttle is med to high open, if its in low it does not come off, any reasoning for this

inspect belt & pulleys visually & by hand for wear.

I agree with the above but to add to that, some mowers are just funny that way. My Bob-Cat likes to throw the belt if I engage the blades with the engine rpms too low.

One thing that can make a difference is your cutting height and the resulting angle from the engine to the deck. Mid cutting heights usually have the least angle between the 2 and will result in less chance of throwing the belt.

Yeah, ideally it's best to resolve an issue but sometimes working around it is the practical route.

Edit:. Make sure that the spring-loaded idler arm that tensions the belt is lubricated and moving freely.

My belts kept runnin off 2... got me sum sUSpenders, fixed that schitt in a hurry !! .. :laughing:..:laughing:

Found a bad pulley and replaced works good now Thanks guys