Is there any way i can get the rancher 420 service manuel on the internet? If not where can i get one, and how much do they usually cost? \n\n\nWhat would commonly couse a gear(4th) to not catch. all the other gears work fine. in 4th all u hear is a grinding sound and the motor will rev as in nutral. 5th 3rd 2nd and 1st work fine.