Blink;
To be on the safe side, I think I would take off the sump and end covers along with the side cover to have a look at everything. As I said, most of the engines are fine but we have found some significant problems with a couple. I wouldn't feel comfortable telling someone to run it out-of-the-box. I don't think there is a need to completely disassemble unless you find some problems.
The engines come with a flat pulley, but you can also run off the drive side flywheel. In my case I run at 1200 rpm using a 13" pulley.
You can always idle back, but it is not a good idea. With a single speed engine the governor dictates how much fuel the engine consumes - if there is no load it is just idling anyway, slowing it down would not save much and would result in a lower voltage output. You don't really want to be running a diesel engine for long periods without load - they just get lazy and coke up on you. They like to work, my 6/1's are usually running at 80% of capacity.
