I have the same generator, although that one looks to be in better shape. I have found the manual for the engine (a military variant of the quite common wisconsin vg4d engine). I have not found a manual for the complete unit unfortunately. Buying it can be risky, the unit has an electronic choke and governor, which might be tough to replace if it goes bad. I like mine, but don't know all of the capabilities of it as I don't have a manual. I've heard that Consolidated Diesel was absorbed by Cummins, so they may or may not have information...I have not given them a call yet to check, did e-mail them and they didn't recognize the EMU-10 name, they suggested calling a local Cummins dealer with the Consolidated Diesel model number.