To be honest, I never ever noticed the 100 hp part. If it truly develops l00 horsepower while running at rated engine speed you are pushing it too hard if actually using that horsepower. Too dam hot inside those cylinders. I'm with using same oil during break in as you intend to use after. A newly overhauled engine needs maximum protection during that period and a break in oil may not have that. Remember the days it was popular to use non detergent for break in. Well, that is called wear in, not break in. I worked at John Deere for a while and they did indeed use break in oil. I did what I was told, not what I felt. One more thing on those sleeves, besides checking piston to sleeve clearance, there have been ring sets showing up with too little end gap. I know one engine that siezed first time it was worked hard (John Deere). They determined too little end gap. I also found one ring in a set that had near zero end gap.
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Today's Featured Article - Choosin, Mounting and Using a Bush Hog Type Mower - by Francis Robinson. Looking around at my new neighbors, most of whom are city raised and have recently acquired their first mini-farms of five to fifteen acres and also from reading questions ask at various discussion sites on the web it is frighteningly apparent that a great many guys (and a few gals) are learning by trial and error and mostly error how to use a very dangerous piece of farm equipment. It is also very apparent that these folks are getting a lot of very poor and often very dangerous advice fro
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