Could be the Starter or the Transmission
If your tractor cannot start, check your safety switches.
It could be a dead battery.
i might be wrong but it could be the 'bendex'. this is the part of the starter motor that disengages it after the engine turns on. it might not be fully disengaged from the previous trip. sometimes all that is needed to get it to go is to rock the car foreward or back a little. hope that helps.
i need help with my car
It's sounds like your low on freon.
solenoid or relay switch
Dead battery? try jumping it off. bad starter solenoid? bad starter?
Answer 1 - Vehicle Will Start When "Jumped"There could be several causes, but based on "...clicks once won't start starts when jumped.." suggests that there is something wrong within the cables or terminal clamps or connectors [corrosion inside that can't be observed] between the battery and solenoid, OR possibly a defective solenoid.
because it must be the batteries might be working
clean the battery terminals with baking soda and water. them jump it
jump start the car and get a new battery and if it isn't the battery it could be the alternator or both, but try a new battery first
Have someone that you know that knows about cars check the starter cellanoid.