I took the Beaver on the same 230 mile round trip again this weekend. It was raining when we were getting ready to take off and the wipers weren't working so a buddy and myself looked into it and determined the motor was burned out. So we took that out and rigged up some rope to the wiper blades and took it into town to get a replacement. We put the new one in and it worked, the only bad thing, it doesn't have a low/high any more. It only has super crazy fast now so I need to look into how to change that or get my low/high option back but it works now and I dont need to pull ropes to run the wipers anymore so I'll be happy for a while.
Still haven't had a chance to get any lp gas to try it out...