My father was so impressed by that engine, that he sought out a used more modern engine from the same company, got it refurbished and updated by this local custom shop and then he put it into the ship he and we built while I was young. That engine had service done to it each spring and it just worked, it wasn't the best fuel economy wise, but it never broke down unless there was an issue with cooling and even so, wait until it cooled back down and fix the water issue while you wait, and it started right back up. That's how mature engine tech had become in the past and most modern stuff is cleaner and more efficient, but where's the faultless running that almost never fails? That we don't see as such engines don't make the companies enough money over time.

It's about materials used, precision made parts with no un-need slack. The funny thing is, the core of an engine rarely fails if you treat it right and oils the right place, ask your self this, why don't the heart of an engine break, while the rest around it tend to fail after a few years? The heart, the cylinders are mature tech that need a certain level of tightness to work, but to get there it must be good workmanship and that lasts, the other stuff, oh that gets a more shoddy treatment so that it'll break faster than needed, just to keep up the pressure so that you keeps paying.