Yes you can. It takes two people who know what they are doing. It can be dangerous. My Grandfather pull started his model B with a model 60. He didn't think it through though. He was running the 60 and when the B started, it just happily pushed the 60 around. Since nobody was on the B, he rode around the farm for a few hours until it ran out of gas. :lol::lol::lol:
He laughed telling me the story. He said the brakes on the 60 wouldn't stop or stall the B. He wasn't going to jump. He said he shut the 60 off and just happily rode around like that was his plan all along.
The B had a metal bar attached from the front wheels straight to the drawbar on the 60. Here's the B years after this happened still with the bar attached.
I saw the bar and asked him what it was all about. He said it was a funny story. :mocking: