If you've got a 3-speed, then the neighbor probably got the 1st--reverse shifter a little messed up. Under the hood it's the shifter lever closest to the engine manifold. You might have to disconnect the shifter arm from the lever, and work the rod up or down till it hits neutral (mid-travel). Then, using the shifter, try to get 2nd and 3rd in neutral. Hook it all back up and you should be OK. Not a good idea to force anything. Good Luck, Tom