I recently went to start the tractor the other day and there was just a spark that came from the left side of thetractor. I did not see exaclty where it came from. I thought it might have been the solenoid. I had an extra and I replaced it. I had my son stand next to the tractor while I attempted to start it. Once again it just sparked. My son said it came from the connection to the starter. Could there be an issue with the starter or the cable connecting to the starter. The connection does look alitte corroded but prior to this problem the tractor has started up right away. The other problem I have is wit the pto. I can not shift the pto lever to engage the pto. Any thoughts would be great. I need to brush hog the back field.