first off an 1800 rpm generator will ALWAYS be much better than a 3600 rpm generator. SO THAT is the real answer.
Second... for emission purposes, and more power in the same form factor, is why most went to overhead valves. Met that a smaller engine, less weight could be used, with mostly aluminum/potmetal parts, cheaper and faster to make, but basically a throw away engine.
The are still thousands of great onan and Kohler flat head 1800 rpm generators running today and will still be running long after the ohv engines are dust. This is why you are rebuilding the Kohler engine, as it can be rebuilt, and will be around for your great grand kids.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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