As ss55 indicated there was a class-action lawsuit brought against engine manufacturers for over-stating their engine's power output. From what I understand the ratings were being taken at engine speeds that were not attainable in the real world, primarily because blade tip speed regulations limited the maximum engine speed to around 3000 rpm for walk-behind mowers. The old power ratings were generally taken at 3600 rpm. My thinking is that the companies didn't want to lose face by de-rating their engines to account for the reduced speed so Briggs and others started rating the "power" using torque instead. This is actually quite silly since torque is not a unit of power at all and it tells you nothing about the work capacity of an engine until it is combined with the rotational speed at which it is being delivered. The propaganda video that Briggs has out on YouTube trying convince us that torque is such a good "power" rating is really laughable.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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