My opinion is that the G series is the best ever built and I think Cat went backwards with the new K series. That engine is a great little engine, originating from the Mitsubishi-Cat joint venture. The hydrostatic drive is pretty much bullet proof in them. I can't think of anything that I didn't like about them. Even the rippers were an improvement over the old ones on the C series.
Is the engine a 6 cylinder 3046 like the owner said?
Yes, it is.