Yes, the Schnaubel kid learned something from his old man --how to resuscitate a diesel engine after you run it out of fuel. I thought "burning off the waste" was novel; I've never owned a diesel engine of any sort, so I was learning as much as he was.
However, I thought his father nailed the interpersonal dynamic pretty well, saying something to the effect, "He was embarrassed, and I made it worse by digging him (about running out of fuel mid-way through his shift) --it (my digging) was instinctual." The interpersonal relationships amongst the Schnaubel clan are interesting.
As Mike Frade is quick to point out, we only see what they want us to see; but in the case of "the Schnaubel kid" we see the world through the eyes of a teenager, who is more concerned about being embarrassed than fixing a piece of equipment. And who is caught up in an "enterprise" to which "homework" looms as a major distraction. (You remember those days, don't you?) A lot of this world's "hard *****" are formed by such teenage concerns and experiences as depicted on the Gold Rush show. The producers should be appreciated and commended for selecting episodes that "tell a story" as incomplete as it might be.
What is clear about "the Schnaubel kid" is that he loves/fears/respects his old man (his father), and that he loves/loves/loves his grand-father. We are not shown much about the relationship of the Grandfather to the father; we are shown the Grandfather-to-Grandson bond.
From the actions of the mother and the father, though, one suspects that they feel their son's working his Grandfather's claim is "playing around." There seems to be a lot of judgementalism, sarcasm, and "summary actions" in the Schnaubel family; yet the old man (grandfather) seems to serenely survey the carnage much of the time.
What intrigues me is that the grandfather seems to be very much aware of the toxic nature of many of the family relations, and he is at great pains to rescue and/or buffer "the kid" from them. I wonder what role, if any, he had in creating the toxic nature of the family's behavior.
So, bottom-line, I don't see the "Schnaubel kid" as a zero; I see him acting heroically at times --look at what he's attempting-- and humanly at times. I feel for him. I hope that he finds something after he "keeps on digging." Because, if what he takes away from his gold-mining experience is to "keep on digging" (in life) the experience will have been worthwhile.