The exterior crankcase casting is not of the crisp standard we see from major manufacturers. Bearings (races and shaft) feel smooth and cold, it has excellent P/L and C/P fits.

I will partially disassemble it for cleaning and inspection. It has been run. There is much evidence of congealed castor inside and out. In my experience the real weakness is the conrod. Some are OK, some are atrocious. Crankshafts are also suspect on early Aurora Mills .75's as well.

The generic Aurora diesel instructions are shown below. There is no mention of a "K-700" in the range. It differs from the K-600 and K-650 engines in a number of respects. I suspect very few were made.