This is antique Cummins. This design was started in 1933 although this engine is probably a 1945 model mounted to a 100 K Onan generator.. the engine runs very good but I can’t get the generator to work. There’s probably 700 pounds of copper in the generator. I also have several other diesel engines for sale. The Volvo engine that is pictured I will sell for $600 for parts I’m doing nothing about the history of the surgeon except that it came out out of a freightliner truck